nih-gov/www.ncbi.nlm.nih.gov/omim/612309

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<title>
Entry
- *612309 - COAGULATION FACTOR V; F5
- OMIM
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<span class="h4">*612309</span>
<br />
<strong>Table of Contents</strong>
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<a href="#title"><strong>Title</strong></a>
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<a href="#geneMap"><strong>Gene-Phenotype Relationships</strong></a>
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<a href="#text"><strong>Text</strong></a>
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<li role="presentation" style="margin-left: 1em">
<a href="#description">Description</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#cloning">Cloning and Expression</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#geneStructure">Gene Structure</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#mapping">Mapping</a>
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<a href="#geneFunction">Gene Function</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#biochemicalFeatures">Biochemical Features</a>
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<a href="#molecularGenetics">Molecular Genetics</a>
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<a href="#history">History</a>
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<a href="#animalModel">Animal Model</a>
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<a href="#allelicVariants"><strong>Allelic Variants</strong></a>
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<a href="#seeAlso"><strong>See Also</strong></a>
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<a href="#references"><strong>References</strong></a>
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<a href="#contributors"><strong>Contributors</strong></a>
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<a href="#creationDate"><strong>Creation Date</strong></a>
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</div>
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<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimProtein">
<span class="panel-title">
<span class="small">
<a href="#mimProteinLinksFold" id="mimProteinLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<span id="mimProteinLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9658;</span> Protein
</a>
</span>
</span>
</div>
<div id="mimProteinLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://hprd.org/summary?hprd_id=01964&isoform_id=01964_1&isoform_name=Isoform_1" class="mim-tip-hint" title="The Human Protein Reference Database; manually extracted and visually depicted information on human proteins." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HPRD', 'domain': 'hprd.org'})">HPRD</a></div>
<div><a href="https://www.proteinatlas.org/search/F5" class="mim-tip-hint" title="The Human Protein Atlas contains information for a large majority of all human protein-coding genes regarding the expression and localization of the corresponding proteins based on both RNA and protein data." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HumanProteinAtlas', 'domain': 'proteinatlas.org'})">Human Protein Atlas</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/protein/182315,182412,182798,488110,6958266,11095907,17426605,17426607,20146844,23296277,33867367,62183712,68137679,85718563,86451091,86451092,86451093,87128527,105990535,119611255,158256658,194390858,256956273,256956275,256956277,256956279,256956281,308153653,330370706,1632385531,1632385533,1632385535,1632385537,1632385539,1632385541,1632385543,1632385545,1632385547,1632385549" class="mim-tip-hint" title="NCBI protein data." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NCBI Protein', 'domain': 'ncbi.nlm.nih.gov'})">NCBI Protein</a></div>
<div><a href="https://www.uniprot.org/uniprotkb/P12259" class="mim-tip-hint" title="Comprehensive protein sequence and functional information, including supporting data." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'UniProt', 'domain': 'uniprot.org'})">UniProt</a></div>
</div>
</div>
</div>
<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimGeneInfo">
<span class="panel-title">
<span class="small">
<a href="#mimGeneInfoLinksFold" id="mimGeneInfoLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<div style="display: table-row">
<div id="mimGeneInfoLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Gene Info</div>
</div>
</a>
</span>
</span>
</div>
<div id="mimGeneInfoLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="http://biogps.org/#goto=genereport&id=2153" class="mim-tip-hint" title="The Gene Portal Hub; customizable portal of gene and protein function information." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'BioGPS', 'domain': 'biogps.org'})">BioGPS</a></div>
<div><a href="https://www.ensembl.org/Homo_sapiens/Gene/Summary?db=core;g=ENSG00000198734;t=ENST00000367797" class="mim-tip-hint" title="Orthologs, paralogs, regulatory regions, and splice variants." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Ensembl', 'domain': 'ensembl.org'})">Ensembl</a></div>
<div><a href="https://www.genecards.org/cgi-bin/carddisp.pl?gene=F5" class="mim-tip-hint" title="The Human Genome Compendium; web-based cards integrating automatically mined information on human genes." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GeneCards', 'domain': 'genecards.org'})">GeneCards</a></div>
<div><a href="http://amigo.geneontology.org/amigo/search/annotation?q=F5" class="mim-tip-hint" title="Terms, defined using controlled vocabulary, representing gene product properties (biologic process, cellular component, molecular function) across species." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GeneOntology', 'domain': 'amigo.geneontology.org'})">Gene Ontology</a></div>
<div><a href="https://www.genome.jp/dbget-bin/www_bget?hsa+2153" class="mim-tip-hint" title="Kyoto Encyclopedia of Genes and Genomes; diagrams of signaling pathways." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'KEGG', 'domain': 'genome.jp'})">KEGG</a></div>
<dd><a href="http://v1.marrvel.org/search/gene/F5" class="mim-tip-hint" title="Model organism Aggregated Resources for Rare Variant ExpLoration." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MARRVEL', 'domain': 'marrvel.org'})">MARRVEL</a></dd>
<dd><a href="https://monarchinitiative.org/NCBIGene:2153" class="mim-tip-hint" title="Monarch Initiative." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Monarch', 'domain': 'monarchinitiative.org'})">Monarch</a></dd>
<div><a href="https://www.ncbi.nlm.nih.gov/gene/2153" class="mim-tip-hint" title="Gene-specific map, sequence, expression, structure, function, citation, and homology data." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NCBI Gene', 'domain': 'ncbi.nlm.nih.gov'})">NCBI Gene</a></div>
<div><a href="https://genome.ucsc.edu/cgi-bin/hgGene?db=hg38&hgg_chrom=chr1&hgg_gene=ENST00000367797.9&hgg_start=169511951&hgg_end=169586481&hgg_type=knownGene" class="mim-tip-hint" title="UCSC Genome Bioinformatics; gene-specific structure and function information with links to other databases." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'UCSC', 'domain': 'genome.ucsc.edu'})">UCSC</a></div>
</div>
</div>
</div>
<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimClinicalResources">
<span class="panel-title">
<span class="small">
<a href="#mimClinicalResourcesLinksFold" id="mimClinicalResourcesLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<div style="display: table-row">
<div id="mimClinicalResourcesLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Clinical Resources</div>
</div>
</a>
</span>
</span>
</div>
<div id="mimClinicalResourcesLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel" aria-labelledby="clinicalResources">
<div class="panel-body small mim-panel-body">
<div><a href="https://search.clinicalgenome.org/kb/gene-dosage/HGNC:3542" class="mim-tip-hint" title="A ClinGen curated resource of genes and regions of the genome that are dosage sensitive and should be targeted on a cytogenomic array." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'ClinGen Dosage', 'domain': 'dosage.clinicalgenome.org'})">ClinGen Dosage</a></div>
<div><a href="https://search.clinicalgenome.org/kb/genes/HGNC:3542" class="mim-tip-hint" title="A ClinGen curated resource of ratings for the strength of evidence supporting or refuting the clinical validity of the claim(s) that variation in a particular gene causes disease." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'ClinGen Validity', 'domain': 'search.clinicalgenome.org'})">ClinGen Validity</a></div>
<div><a href="https://medlineplus.gov/genetics/gene/f5" class="mim-tip-hint" title="Consumer-friendly information about the effects of genetic variation on human health." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MedlinePlus Genetics', 'domain': 'medlineplus.gov'})">MedlinePlus Genetics</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=612309[mim]" class="mim-tip-hint" title="Genetic Testing Registry." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GTR', 'domain': 'ncbi.nlm.nih.gov'})">GTR</a></div>
</div>
</div>
</div>
<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimVariation">
<span class="panel-title">
<span class="small">
<a href="#mimVariationLinksFold" id="mimVariationLinksToggle" class=" mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<span id="mimVariationLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9660;</span> Variation
</a>
</span>
</span>
</div>
<div id="mimVariationLinksFold" class="panel-collapse collapse in mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.ncbi.nlm.nih.gov/clinvar?term=612309[MIM]" class="mim-tip-hint" title="ClinVar aggregates information about sequence variation and its relationship to human health." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">ClinVar</a></div>
<div><a href="https://www.deciphergenomics.org/gene/F5/overview/clinical-info" class="mim-tip-hint" title="DECIPHER" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'DECIPHER', 'domain': 'DECIPHER'})">DECIPHER</a></div>
<div><a href="https://gnomad.broadinstitute.org/gene/ENSG00000198734" class="mim-tip-hint" title="The Genome Aggregation Database (gnomAD), Broad Institute." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'gnomAD', 'domain': 'gnomad.broadinstitute.org'})">gnomAD</a></div>
<div><a href="https://www.ebi.ac.uk/gwas/search?query=F5" class="mim-tip-hint" title="GWAS Catalog; NHGRI-EBI Catalog of published genome-wide association studies." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GWAS Catalog', 'domain': 'gwascatalog.org'})">GWAS Catalog&nbsp;</a></div>
<div><a href="https://www.gwascentral.org/search?q=F5" class="mim-tip-hint" title="GWAS Central; summary level genotype-to-phenotype information from genetic association studies." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GWAS Central', 'domain': 'gwascentral.org'})">GWAS Central&nbsp;</a></div>
<div><a href="http://www.hgmd.cf.ac.uk/ac/gene.php?gene=F5" class="mim-tip-hint" title="Human Gene Mutation Database; published mutations causing or associated with human inherited disease; disease-associated/functional polymorphisms." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HGMD', 'domain': 'hgmd.cf.ac.uk'})">HGMD</a></div>
<div><a href="https://evs.gs.washington.edu/EVS/PopStatsServlet?searchBy=Gene+Hugo&target=F5&upstreamSize=0&downstreamSize=0&x=0&y=0" class="mim-tip-hint" title="National Heart, Lung, and Blood Institute Exome Variant Server." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NHLBI EVS', 'domain': 'evs.gs.washington.edu'})">NHLBI EVS</a></div>
<div><a href="https://www.pharmgkb.org/gene/PA159" class="mim-tip-hint" title="Pharmacogenomics Knowledge Base; curated and annotated information regarding the effects of human genetic variations on drug response." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PharmGKB', 'domain': 'pharmgkb.org'})">PharmGKB</a></div>
</div>
</div>
</div>
<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimAnimalModels">
<span class="panel-title">
<span class="small">
<a href="#mimAnimalModelsLinksFold" id="mimAnimalModelsLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<div style="display: table-row">
<div id="mimAnimalModelsLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Animal Models</div>
</div>
</a>
</span>
</span>
</div>
<div id="mimAnimalModelsLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.alliancegenome.org/gene/HGNC:3542" class="mim-tip-hint" title="Search Across Species; explore model organism and human comparative genomics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Alliance Genome', 'domain': 'alliancegenome.org'})">Alliance Genome</a></div>
<div><a href="https://www.mousephenotype.org/data/genes/MGI:88382" class="mim-tip-hint" title="International Mouse Phenotyping Consortium." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'IMPC', 'domain': 'knockoutmouse.org'})">IMPC</a></div>
<div><a href="http://v1.marrvel.org/search/gene/F5#HomologGenesPanel" class="mim-tip-hint" title="Model organism Aggregated Resources for Rare Variant ExpLoration." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MARRVEL', 'domain': 'marrvel.org'})">MARRVEL</a></div>
<div><a href="http://www.informatics.jax.org/marker/MGI:88382" class="mim-tip-hint" title="Mouse Genome Informatics; international database resource for the laboratory mouse, including integrated genetic, genomic, and biological data." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MGI Mouse Gene', 'domain': 'informatics.jax.org'})">MGI Mouse Gene</a></div>
<div><a href="https://www.mmrrc.org/catalog/StrainCatalogSearchForm.php?search_query=" class="mim-tip-hint" title="Mutant Mouse Resource & Research Centers." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MMRRC', 'domain': 'mmrrc.org'})">MMRRC</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gene/2153/ortholog/" class="mim-tip-hint" title="Orthologous genes at NCBI." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NCBI Orthologs', 'domain': 'ncbi.nlm.nih.gov'})">NCBI Orthologs</a></div>
<div><a href="https://www.orthodb.org/?ncbi=2153" class="mim-tip-hint" title="Hierarchical catalogue of orthologs." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'OrthoDB', 'domain': 'orthodb.org'})">OrthoDB</a></div>
<div><a href="https://zfin.org/ZDB-GENE-030131-5531" class="mim-tip-hint" title="The Zebrafish Model Organism Database." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'ZFin', 'domain': 'zfin.org'})">ZFin</a></div>
</div>
</div>
</div>
<div class="panel panel-default" style="margin-top: 0px; border-radius: 0px">
<div class="panel-heading mim-panel-heading" role="tab" id="mimCellularPathways">
<span class="panel-title">
<span class="small">
<a href="#mimCellularPathwaysLinksFold" id="mimCellularPathwaysLinksToggle" class="collapsed mimSingletonTriangleToggle" role="button" data-toggle="collapse" data-parent="#mimExternalLinksAccordion">
<div style="display: table-row">
<div id="mimCellularPathwaysLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Cellular Pathways</div>
</div>
</a>
</span>
</span>
</div>
<div id="mimCellularPathwaysLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.genome.jp/dbget-bin/get_linkdb?-t+pathway+hsa:2153" class="mim-tip-hint" title="Kyoto Encyclopedia of Genes and Genomes; diagrams of signaling pathways." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'KEGG', 'domain': 'genome.jp'})">KEGG</a></div>
<div><a href="https://reactome.org/content/query?q=F5&species=Homo+sapiens&types=Reaction&types=Pathway&cluster=true" class="definition" title="Protein-specific information in the context of relevant cellular pathways." target="_blank" onclick="gtag('event', 'mim_outbound', {{'name': 'Reactome', 'domain': 'reactome.org'}})">Reactome</a></div>
</div>
</div>
</div>
</div>
</div>
</div>
<span>
<span class="mim-tip-bottom" qtip_title="<strong>Looking for this gene or this phenotype in other resources?</strong>" qtip_text="Select a related resource from the dropdown menu and click for a targeted link to information directly relevant.">
&nbsp;
</span>
</span>
</div>
<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>SNOMEDCT:</strong> 4320005<br />
">ICD+</a>
</div>
<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Gene description">
<span class="text-danger"><strong>*</strong></span>
612309
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
COAGULATION FACTOR V; F5
</span>
</h3>
</div>
<div>
<br />
</div>
<div>
<a id="alternativeTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
<div>
<h4>
<span class="mim-font">
PROTEIN C COFACTOR; PCCF<br />
ACTIVATED PROTEIN C COFACTOR<br />
APC COFACTOR<br />
LABILE FACTOR
</span>
</h4>
</div>
</div>
<div>
<br />
</div>
<div>
<a id="includedTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
Other entities represented in this entry:
</span>
</p>
</div>
<div>
<span class="h3 mim-font">
FACTOR V LEIDEN, INCLUDED
</span>
</div>
</div>
<div>
<br />
</div>
</div>
<div>
<a id="approvedGeneSymbols" class="mim-anchor"></a>
<p>
<span class="mim-text-font">
<strong><em>HGNC Approved Gene Symbol: <a href="https://www.genenames.org/tools/search/#!/genes?query=F5" class="mim-tip-hint" title="HUGO Gene Nomenclature Committee." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HGNC', 'domain': 'genenames.org'})">F5</a></em></strong>
</span>
</p>
</div>
<div>
<a id="cytogeneticLocation" class="mim-anchor"></a>
<p>
<span class="mim-text-font">
<strong>
<em>
Cytogenetic location: <a href="/geneMap/1/1404?start=-3&limit=10&highlight=1404">1q24.2</a>
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : <a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&position=chr1:169511951-169586481&dgv=pack&knownGene=pack&omimGene=pack" class="mim-tip-hint" title="UCSC Genome Browser; reference sequences and working draft assemblies for a large collection of genomes." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'UCSC Genome Browser', 'domain': 'genome.ucsc.edu'})">1:169,511,951-169,586,481</a> </span>
</em>
</strong>
<a href="https://www.ncbi.nlm.nih.gov/" target="_blank" class="small"> (from NCBI) </a>
</span>
</p>
</div>
<div>
<br />
</div>
<div>
<a id="geneMap" class="mim-anchor"></a>
<div style="margin-bottom: 10px;">
<span class="h4 mim-font">
<strong>Gene-Phenotype Relationships</strong>
</span>
</div>
<div>
<table class="table table-bordered table-condensed table-hover small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
<span class="hidden-sm hidden-xs pull-right">
<a href="/clinicalSynopsis/table?mimNumber=600880,614389,601367,188055,227400,188055" class="label label-warning" onclick="gtag('event', 'mim_link', {'source': 'Entry', 'destination': 'clinicalSynopsisTable'})">
View Clinical Synopses
</a>
</span>
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="6">
<span class="mim-font">
<a href="/geneMap/1/1404?start=-3&limit=10&highlight=1404">
1q24.2
</a>
</span>
</td>
<td>
<span class="mim-font">
{Budd-Chiari syndrome}
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600880"> 600880 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known">3</abbr>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
{Pregnancy loss, recurrent, susceptibility to, 1}
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614389"> 614389 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known">3</abbr>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
{Stroke, ischemic, susceptibility to}
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601367"> 601367 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Multifactorial">Mu</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known">3</abbr>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
{Thrombophilia, susceptibility to, due to factor V Leiden}
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/188055"> 188055 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known">3</abbr>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
Factor V deficiency
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/227400"> 227400 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known">3</abbr>
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Thrombophilia 2 due to activated protein C resistance
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<a href="/entry/188055"> 188055 </a>
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<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
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<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known">3</abbr>
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<strong>TEXT</strong>
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<a id="description" class="mim-anchor"></a>
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<strong>Description</strong>
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<p>The F5 gene encodes coagulation factor V, a large 330-kD plasma glycoprotein that circulates with little or no activity. Factor V is converted to the active form, factor Va, by thrombin (F2; <a href="/entry/176930">176930</a>), which generates a heavy chain and a light chain held together by calcium ions. Activated factor V serves as an essential protein in the coagulation pathway and acts as a cofactor for the conversion of prothrombin to thrombin by factor Xa (F10; <a href="/entry/613872">613872</a>). Factor Va is inactivated by activated protein C (PROC; <a href="/entry/612283">612283</a>) (<a href="#34" class="mim-tip-reference" title="Kane, W. H., Davie, E. W. &lt;strong&gt;Cloning of a cDNA coding for human factor V, a blood coagulation factor homologous to factor VIII and ceruloplasmin.&lt;/strong&gt; Proc. Nat. Acad. Sci. 83: 6800-6804, 1986.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3092220/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;3092220&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.83.18.6800&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="3092220">Kane and Davie, 1986</a>; <a href="#13" class="mim-tip-reference" title="Cripe, L. D., Moore, K. D., Kane, W. H. &lt;strong&gt;Structure of the gene for human coagulation factor V.&lt;/strong&gt; Biochemistry 31: 3777-3785, 1992.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1567832/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;1567832&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1021/bi00130a007&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="1567832">Cripe et al., 1992</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=1567832+3092220" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<div>
<a id="cloning" class="mim-anchor"></a>
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<strong>Cloning and Expression</strong>
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<p><a href="#35" class="mim-tip-reference" title="Kane, W. H., Ichinose, A., Hagen, F. S., Davie, E. W. &lt;strong&gt;Cloning of cDNAs coding for the heavy chain region and connecting region of human factor V, a blood coagulation factor with four types of internal repeats.&lt;/strong&gt; Biochemistry 26: 6508-6514, 1987.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/2827731/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;2827731&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1021/bi00394a033&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="2827731">Kane et al. (1987)</a> isolated clones corresponding to a portion of the F5 gene from a human hepatocellular carcinoma (Hep G2) cDNA library. The deduced 938-residue partial protein was composed of a 651-residue light chain and a 287-residue connecting region. The amino acid sequence of the light chain region was about 40% identical to the corresponding region of factor VIII (F8; <a href="/entry/300841">300841</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2827731" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#32" class="mim-tip-reference" title="Jenny, R. J., Pittman, D. D., Toole, J. J., Kriz, R. W., Aldape, R. A., Hewick, R. M., Kaufman, R. J., Mann, K. G. &lt;strong&gt;Complete cDNA and derived amino acid sequence of human factor V.&lt;/strong&gt; Proc. Nat. Acad. Sci. 84: 4846-4850, 1987.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3110773/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;3110773&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.84.14.4846&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="3110773">Jenny et al. (1987)</a> isolated a complete cDNA for factor V from a human fetal liver cDNA library and determined that the deduced amino acid sequence consists of 2,224 residues including a 28-residue leader peptide. The triplicated A domain and duplicated C domain showed approximately 40% identity with the corresponding domains in factor VIII. Factor V contains 37 potential N-linked glycosylation sites, 25 of which are in the B domain, and a total of 19 cysteine residues. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3110773" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="geneStructure" class="mim-anchor"></a>
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<strong>Gene Structure</strong>
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<p><a href="#13" class="mim-tip-reference" title="Cripe, L. D., Moore, K. D., Kane, W. H. &lt;strong&gt;Structure of the gene for human coagulation factor V.&lt;/strong&gt; Biochemistry 31: 3777-3785, 1992.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1567832/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;1567832&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1021/bi00130a007&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="1567832">Cripe et al. (1992)</a> determined that the F5 gene contains 25 exons. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1567832" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="mapping" class="mim-anchor"></a>
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<strong>Mapping</strong>
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<p><a href="#51" class="mim-tip-reference" title="Riddell, D. C., Wang, H., Royle, N. J., Nigli, M., Guinto, E., Kochinsky, M. L., Irwin, D. M., Cool, D., MacGillivray, R. T. A., Hamerton, J. L. &lt;strong&gt;Regional assignment for the human genes encoding FII, FV, FXIII, ceruloplasmin and pseudoceruloplasmin. (Abstract)&lt;/strong&gt; Cytogenet. Cell Genet. 46: 682, 1987."None>Riddell et al. (1987)</a> and <a href="#61" class="mim-tip-reference" title="Wang, H., Riddell, D. C., Guinto, E. R., MacGillivray, R. T. A., Hamerton, J. L. &lt;strong&gt;Localization of the gene encoding human factor V to chromosome 1q21-25.&lt;/strong&gt; Genomics 2: 324-328, 1988.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3220473/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;3220473&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/0888-7543(88)90021-3&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="3220473">Wang et al. (1988)</a> mapped the F5 gene to chromosome 1 by Southern hybridization to somatic cell hybrid DNAs. By in situ hybridization, F5 was regionalized to 1q21-q25. <a href="#16" class="mim-tip-reference" title="Dahlback, B., Hansson, C., Islam, M. Q., Szpirer, J., Szpirer, C., Lundwall, A., Levan, G. &lt;strong&gt;Assignment of gene for coagulation factor V to chromosome 1 in man and to chromosome 13 in rat.&lt;/strong&gt; Somat. Cell Molec. Genet. 14: 509-514, 1988.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3175767/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;3175767&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/BF01534716&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="3175767">Dahlback et al. (1988)</a> confirmed the assignment of F5 to human chromosome 1 by hybridization studies of a panel of human-rodent somatic cell hybrids, and mapped the rat gene to chromosome 13. Combining linkage data with the physical assignment of the F5 locus, <a href="#47" class="mim-tip-reference" title="McAlpine, P. J., Coopland, G., Guy, C., James, S., Komarnicki, L., MacDonald, M., Stranc, L., Lewis, M., Philipps, S., Coghlan, G., Kaita, H., Cox, D. W., Guinto, E. R., MacGillivray, R. &lt;strong&gt;Mapping the genes for erythrocytic alpha-spectrin 1 (SPTA1) and coagulation factor V (F5). (Abstract)&lt;/strong&gt; Cytogenet. Cell Genet. 51: 1042, 1989."None>McAlpine et al. (1989)</a> concluded that F5 lies in the 1q23 band. They found that F5 and AT3 (<a href="/entry/107300">107300</a>) are closely linked, with F5 located distal to AT3. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=3220473+3175767" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p><a href="#2" class="mim-tip-reference" title="Bauer, K. A. &lt;strong&gt;Hypercoagulability--a new cofactor in the protein C anticoagulant pathway.&lt;/strong&gt; New Eng. J. Med. 330: 566-567, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8302325/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8302325&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM199402243300810&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8302325">Bauer (1994)</a> reviewed the significance of the APC cofactor in the protein C anticoagulant pathway and illustrated it with a useful diagram. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8302325" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>Biochemical Features</strong>
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<p><strong><em>Crystal Structure</em></strong></p><p>
<a href="#42" class="mim-tip-reference" title="Macedo-Ribeiro, S., Bode, W., Huber, R., Quinn-Allen, M. A., Kim, S. W., Ortel, T. L., Bourenkov, G. P., Bartunik, H. D., Stubbs, M. T., Kane, W. H., Fuentes-Prior, P. &lt;strong&gt;Crystal structures of the membrane-binding C2 domain of human coagulation factor V.&lt;/strong&gt; Nature 402: 434-439, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10586886/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10586886&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/46594&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10586886">Macedo-Ribeiro et al. (1999)</a> determined 2 crystal structures of the C2 domain of human factor Va. The conserved beta-barrel framework provides a scaffold for 3 protruding loops, one of which adopts markedly different conformations in the 2 crystal forms. <a href="#42" class="mim-tip-reference" title="Macedo-Ribeiro, S., Bode, W., Huber, R., Quinn-Allen, M. A., Kim, S. W., Ortel, T. L., Bourenkov, G. P., Bartunik, H. D., Stubbs, M. T., Kane, W. H., Fuentes-Prior, P. &lt;strong&gt;Crystal structures of the membrane-binding C2 domain of human coagulation factor V.&lt;/strong&gt; Nature 402: 434-439, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10586886/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10586886&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/46594&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10586886">Macedo-Ribeiro et al. (1999)</a> proposed a mechanism of calcium-independent, stereospecific binding of factors Va and VIIIa to phospholipid membranes on the basis of (1) immersion of hydrophobic residues at the apices of these loops in the apolar membrane core; (2) specific interactions with phosphatidylserine head groups in the groove enclosed by these loops; and (3) favorable electrostatic contacts of basic side chains with negatively charged membrane phosphate groups. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10586886" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="molecularGenetics" class="mim-anchor"></a>
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<strong>Molecular Genetics</strong>
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<span class="mim-text-font">
<p>In discussing the good and bad aspects of factor V functionality and durability, <a href="#45" class="mim-tip-reference" title="Mann, K. G., Kalafatis, M. &lt;strong&gt;Factor V: a combination of Dr Jekyll and Mr Hyde.&lt;/strong&gt; Blood 101: 20-30, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12393635/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;12393635&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood-2002-01-0290&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="12393635">Mann and Kalafatis (2003)</a> referred to factor V as a combination of Dr. Jekyll and Mr. Hyde. Mutations resulting in the absence or dysfunction of activated factor V lead to hemorrhagic disease, whereas mutations resulting in excessive longevity of the active species are associated with thrombosis. Factor V is thus required for a good outcome (Dr. Jekyll) but also is a potential source of disaster (Mr. Hyde). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12393635" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Factor V Deficiency</em></strong></p><p>
In a patient with mild bleeding due to factor V deficiency (<a href="/entry/227400">227400</a>), <a href="#24" class="mim-tip-reference" title="Guasch, J. F., Cannegieter, S., Reitsma, P. H., van&#x27;t Veer-Korthof, E. T., Bertina, R. M. &lt;strong&gt;Severe coagulation factor V deficiency caused by a 4 bp deletion in the factor V gene.&lt;/strong&gt; Brit. J. Haemat. 101: 32-39, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9576178/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9576178&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1998.00664.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9576178">Guasch et al. (1998)</a> identified a homozygous mutation in the F5 gene (<a href="#0004">612309.0004</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9576178" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In a Korean woman with bleeding due to factor V deficiency, <a href="#59" class="mim-tip-reference" title="van Wijk, R., Nieuwenhuis, K., van den Berg, M., Huizinga, E. G., van der Meijden, B. B., Kraaijenhagen, R. J., van Solinge, W. W. &lt;strong&gt;Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency.&lt;/strong&gt; Blood 98: 358-367, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11435304/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11435304&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood.v98.2.358&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11435304">van Wijk et al. (2001)</a> identified compound heterozygosity for 2 mutations in the F5 gene (<a href="#0006">612309.0006</a>; <a href="#0007">612309.0007</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11435304" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Thrombophilia Due to Activated Protein C Resistance</em></strong></p><p>
In affected members of a family with thrombophilia due to APC resistance (THPH2; <a href="/entry/188055">188055</a>), <a href="#4" class="mim-tip-reference" title="Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H. &lt;strong&gt;Mutation in blood coagulation factor V associated with resistance to activated protein C.&lt;/strong&gt; Nature 369: 64-67, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164741&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369064a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164741">Bertina et al. (1994)</a> identified a heterozygous R506Q mutation (<a href="#0001">612309.0001</a>) in the F5 gene. This variant was referred to as factor V Leiden, named after the town in the Netherlands where <a href="#4" class="mim-tip-reference" title="Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H. &lt;strong&gt;Mutation in blood coagulation factor V associated with resistance to activated protein C.&lt;/strong&gt; Nature 369: 64-67, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164741&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369064a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164741">Bertina et al. (1994)</a> discovered the defect. <a href="#4" class="mim-tip-reference" title="Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H. &lt;strong&gt;Mutation in blood coagulation factor V associated with resistance to activated protein C.&lt;/strong&gt; Nature 369: 64-67, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164741&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369064a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164741">Bertina et al. (1994)</a> identified the same R506Q mutation in 56 of 64 patients with APC-resistant thrombosis from a larger cohort of 301 consecutive patients with a first episode of deep vein thrombosis. The mutation was homozygous in 6 patients. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8164741" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#60" class="mim-tip-reference" title="Voorberg, J., Roelse, J., Koopman, R., Buller, H., Berends, F., ten Cate, J. W., Mertens, K., van Mourik, J. A. &lt;strong&gt;Association of idiopathic venous thromboembolism with single point-mutation at arg506 of factor V.&lt;/strong&gt; Lancet 343: 1535-1536, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7911872/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7911872&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0140-6736(94)92939-4&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7911872">Voorberg et al. (1994)</a> found the R506Q mutation in 10 of 27 consecutive patients with recurrent thromboembolism. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7911872" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#44" class="mim-tip-reference" title="Majerus, P. W. &lt;strong&gt;Bad blood by mutation.&lt;/strong&gt; Nature 369: 14-15, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164730/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164730&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369014a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164730">Majerus (1994)</a> quoted estimates that 2 to 4% of the Dutch population and 7% of the Swedish population carried the mutant R506Q allele. The high frequency of a single factor V mutation in diverse groups of people raised the question of whether positive selection pressure was involved in maintaining it in the population. <a href="#44" class="mim-tip-reference" title="Majerus, P. W. &lt;strong&gt;Bad blood by mutation.&lt;/strong&gt; Nature 369: 14-15, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164730/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164730&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369014a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164730">Majerus (1994)</a> suggested that a slight thrombotic tendency may confer some advantage in fetal implantation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8164730" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In a patient with thrombophilia due to APC resistance, <a href="#63" class="mim-tip-reference" title="Williamson, D., Brown, K., Luddington, R., Baglin, C., Baglin, T. &lt;strong&gt;Factor V Cambridge: a new mutation (arg306-to-thr) associated with resistance to activated protein C.&lt;/strong&gt; Blood 91: 1140-1144, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9454742/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9454742&lt;/a&gt;]" pmid="9454742">Williamson et al. (1998)</a> identified a heterozygous R306T mutation in the F5 gene (<a href="#0003">612309.0003</a>). The mutation was also present in a first-degree relative with APC resistance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9454742" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In 2 Caucasian brothers with thrombophilia due to APC resistance, <a href="#50" class="mim-tip-reference" title="Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B. &lt;strong&gt;Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.&lt;/strong&gt; Brit. J. Haemat. 123: 496-501, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14617013/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14617013&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.2003.04624.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14617013">Mumford et al. (2003)</a> identified compound heterozygosity for 2 mutations in the F5 gene: a missense mutation (I359T; <a href="#0013">612309.0013</a>) and a nonsense mutation (E119X; <a href="#0014">612309.0014</a>). Both brothers developed spontaneous venous thromboses in the second decade of life. One presented at the age of 14 years with thrombosis of the right femoral vein and inferior vena cava; an older brother had recurrent episodes of femoral vein thrombosis from the age of 18 years and was managed with long-term warfarin therapy. Heterozygous family members were asymptomatic. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14617013" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Pseudohomozygosity for Factor V Leiden</em></strong></p><p>
<a href="#8" class="mim-tip-reference" title="Castaman, G., Lunghi, B., Missiaglia, E., Bernardi, F., Rodeghiero, F. &lt;strong&gt;Phenotypic homozygous activated protein C resistance associated with compound heterozygosity for arg506-to-gln (factor V Leiden) and his1299-to-arg substitutions in factor V.&lt;/strong&gt; Brit. J. Haemat. 99: 257-261, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9375735/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9375735&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1997.3993213.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9375735">Castaman et al. (1997)</a> and <a href="#10" class="mim-tip-reference" title="Castoldi, E., Kalafatis, M., Lunghi, B., Simioni, P., Ioannou, P. A., Petio, M., Girolami, A., Mann, K. G., Bernardi, F. &lt;strong&gt;Molecular bases of pseudo-homozygous APC resistance: the compound heterozygosity for FV R506Q and a FV null mutation results in the exclusive presence of FV Leiden molecules in plasma.&lt;/strong&gt; Thromb. Haemost. 80: 403-406, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9759618/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9759618&lt;/a&gt;]" pmid="9759618">Castoldi et al. (1998)</a> described patients with thrombosis who were compound heterozygous for factor V Leiden and a factor V deficiency allele. The patients were referred to as having 'pseudohomozygosity' for factor V Leiden, since they presented with venous thromboembolic events. Although the resistance to APC is in the range of factor V Leiden homozygotes, genotyping demonstrated heterozygosity for the factor V Leiden mutation. Those with F5 null mutations showed only factor V Leiden molecules, and those with deficient mutations show decreased levels of F5 that were insufficient to protect against thrombosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=9759618+9375735" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#64" class="mim-tip-reference" title="Zehnder, J. L., Hiraki, D. D., Jones, C. D., Gross, N., Grumet, F. C. &lt;strong&gt;Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford.&lt;/strong&gt; Thromb. Haemost. 82: 1097-1099, 1999. Note: Erratum: Thromb. Haemost. 82: XII only, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10494770/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10494770&lt;/a&gt;]" pmid="10494770">Zehnder et al. (1999)</a> identified a man with thrombophilia who was compound heterozygous for factor V Leiden and a null allele of the F5 gene (<a href="#0005">612309.0005</a>). The patient had 50% of normal levels of F5, all of which was of the Leiden type; hence he was pseudohomozygous for factor V Leiden. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10494770" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Among 7 families with 11 pseudohomozygotes and 45 relatives, <a href="#9" class="mim-tip-reference" title="Castaman, G., Tosetto, A., Ruggeri, M., Rodeghiero, F. &lt;strong&gt;Pseudohomozygosity for activated protein C resistance is a risk factor for venous thrombosis.&lt;/strong&gt; Brit. J. Haemat. 106: 232-236, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10444192/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10444192&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1999.01502.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10444192">Castaman et al. (1999)</a> found that 16 relatives were heterozygous factor V Leiden carriers, 9 showed partial factor V deficiency, and 20 had no abnormalities. Deep vein thrombosis occurred in 4 of 11 (36.3%) pseudohomozygous patients, in 6 of 16 (37.4%) factor V Leiden carriers, and in 1 of 20 (5%) normal relatives. <a href="#9" class="mim-tip-reference" title="Castaman, G., Tosetto, A., Ruggeri, M., Rodeghiero, F. &lt;strong&gt;Pseudohomozygosity for activated protein C resistance is a risk factor for venous thrombosis.&lt;/strong&gt; Brit. J. Haemat. 106: 232-236, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10444192/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10444192&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1999.01502.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10444192">Castaman et al. (1999)</a> concluded that pseudohomozygosity for APC resistance carries a significantly higher risk for venous thromboembolism in comparison to normal subjects, but probably not in comparison to heterozygous FV Leiden carriers. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10444192" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Other Disease Associations</em></strong></p><p>
<a href="#20" class="mim-tip-reference" title="Faisel, F., Romppanen, E.-L., Hiltunen, M., Helisalmi, S., Laasanen, J., Punnonen, K., Salonen, J. T., Heinonen, S. &lt;strong&gt;Susceptibility to pre-eclampsia in Finnish women is associated with R485K polymorphism in the factor V gene, not with Leiden mutation.&lt;/strong&gt; Europ. J. Hum. Genet. 12: 187-191, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14673478/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14673478&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/sj.ejhg.5201124&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14673478">Faisel et al. (2004)</a> analyzed the allele and genotype frequencies of 2 F5 polymorphisms, M385T, R485K, and the R506Q Leiden mutation in 133 Finnish women with preeclampsia (<a href="/entry/189800">189800</a>) and 112 controls. There were statistically significant differences in R485K allele (p = 0.003) and genotype (p = 0.03) frequencies between patients and controls. The A allele of R485K was overrepresented among the patients (12%) compared to the controls (4%), with an odds ratio (OR) of 2.8 (95% CI, 1.2-6.2) for combined A genotypes. <a href="#20" class="mim-tip-reference" title="Faisel, F., Romppanen, E.-L., Hiltunen, M., Helisalmi, S., Laasanen, J., Punnonen, K., Salonen, J. T., Heinonen, S. &lt;strong&gt;Susceptibility to pre-eclampsia in Finnish women is associated with R485K polymorphism in the factor V gene, not with Leiden mutation.&lt;/strong&gt; Europ. J. Hum. Genet. 12: 187-191, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14673478/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14673478&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/sj.ejhg.5201124&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14673478">Faisel et al. (2004)</a> concluded that genetic variations in the factor V gene other than the Leiden mutation may play a role in disease susceptibility. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14673478" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#28" class="mim-tip-reference" title="Hao, K., Wang, X., Niu, T., Xu, X., Li, A., Chang, W., Wang, L., Li, G., Laird, N., Xu., X. &lt;strong&gt;A candidate gene association study on preterm delivery: application of high-throughput genotyping technology and advanced statistical methods.&lt;/strong&gt; Hum. Molec. Genet. 13: 683-691, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14976157/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14976157&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddh091&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14976157">Hao et al. (2004)</a> conducted a large-scale case-control study exploring the associations of 426 single-nucleotide polymorphisms (SNPs) with preterm delivery in 300 mothers with preterm delivery and 458 mothers with term deliveries. Twenty-five candidate genes were included in the final haplotype analysis, and there was a significant association between a F5 gene haplotype and preterm delivery. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14976157" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="history" class="mim-anchor"></a>
<h4 href="#mimHistoryFold" id="mimHistoryToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>History</strong>
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<p><a href="#30" class="mim-tip-reference" title="Hayward, C. P. M., Rivard, G. E., Kane, W. H., Drouin, J., Zheng, S., Moore, J. C., Kelton, J. G. &lt;strong&gt;An autosomal dominant, qualitative platelet disorder associated with multimerin deficiency, abnormalities in platelet factor V, thrombospondin, von Willebrand factor, and fibrinogen and an epinephrine aggregation defect.&lt;/strong&gt; Blood 87: 4967-4978, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8652809/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8652809&lt;/a&gt;]" pmid="8652809">Hayward et al. (1996)</a> described an autosomal dominant bleeding disorder in a Quebec family that was associated with reduced to normal platelet counts, defective epinephrine aggregation, and multiple glycoprotein abnormalities. This disorder had been previously designated 'factor V (Quebec)' by <a href="#57" class="mim-tip-reference" title="Tracy, P. B., Giles, A. R., Mann, K. G., Eide, L. L., Hoogendoorn, H., Rivard, G. E. &lt;strong&gt;Factor V (Quebec): a bleeding diathesis associated with a qualitative platelet factor V deficiency.&lt;/strong&gt; J. Clin. Invest. 74: 1221-1228, 1984.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/6480825/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;6480825&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1172/JCI111531&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="6480825">Tracy et al. (1984)</a> because of abnormalities in platelet factor V. However, Hayward et al. (<a href="#30" class="mim-tip-reference" title="Hayward, C. P. M., Rivard, G. E., Kane, W. H., Drouin, J., Zheng, S., Moore, J. C., Kelton, J. G. &lt;strong&gt;An autosomal dominant, qualitative platelet disorder associated with multimerin deficiency, abnormalities in platelet factor V, thrombospondin, von Willebrand factor, and fibrinogen and an epinephrine aggregation defect.&lt;/strong&gt; Blood 87: 4967-4978, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8652809/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8652809&lt;/a&gt;]" pmid="8652809">1996</a>, <a href="#29" class="mim-tip-reference" title="Hayward, C. P. M., Cramer, E. M., Kane, W. H., Zheng, S., Bouchard, M., Masse, J.-M., Rivard, G. E. &lt;strong&gt;Studies of a second family with the Quebec platelet disorder: evidence that the degradation of the alpha-granule membrane and its soluble contents are not secondary to a defect in targeting proteins to alpha-granules.&lt;/strong&gt; Blood 89: 1243-1253, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9028947/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9028947&lt;/a&gt;]" pmid="9028947">1997</a>) and <a href="#31" class="mim-tip-reference" title="Janeway, C., Rivard, G. E., Tracy, P. B., Mann, K. G. &lt;strong&gt;Factor V Quebec revisited.&lt;/strong&gt; Blood 87: 3571 only, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8611679/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8611679&lt;/a&gt;]" pmid="8611679">Janeway et al. (1996)</a> determined that, although platelet factor V was indeed deficient in this disorder, several other platelet alpha-granular proteins were also deficient. The findings indicated that this was not a primary defect of factor V, but rather a distinct entity, now referred to as the Quebec platelet disorder (<a href="/entry/601709">601709</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=8652809+8611679+9028947+6480825" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="animalModel" class="mim-anchor"></a>
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<strong>Animal Model</strong>
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<p><a href="#15" class="mim-tip-reference" title="Cui, J., O&#x27;Shea, K. S., Purkayastha, A., Saunders, T. L., Ginsburg, D. &lt;strong&gt;Fatal haemorrhage and incomplete block to embryogenesis in mice lacking coagulation factor V.&lt;/strong&gt; Nature 384: 66-68, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8900278/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8900278&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/384066a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8900278">Cui et al. (1996)</a> found that approximately half of homozygous factor V-null mouse embryos died at embryonic days 9 to 10, possibly as a result of an abnormality in the yolk-sac vasculature. The remaining homozygous deficient mice progressed normally to term, but died from massive hemorrhage within 2 hours of birth. Considered together with the milder phenotypes generally associated with deficiencies of other clotting factors, the findings demonstrated the primary role of the common coagulation pathway and the absolute requirement for functional factor V for prothrombinase activity. The results also provided direct evidence for the existence of other critical hemostatic functions for thrombin in addition to fibrin clot formation, and identified a previously unrecognized role for the coagulation system in early mammalian development. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8900278" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#14" class="mim-tip-reference" title="Cui, J., Eitzman, D. T., Westrick, R. J., Christie, P. D., Xu, Z. J., Yang, A. Y., Purkayastha, A. A., Yang, T. L., Metz, A. L., Gallagher, K. P., Tyson, J. A., Rosenberg, R. D., Ginsburg, D. &lt;strong&gt;Spontaneous thrombosis in mice carrying the factor V Leiden mutation.&lt;/strong&gt; Blood 96: 4222-4226, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11110695/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11110695&lt;/a&gt;]" pmid="11110695">Cui et al. (2000)</a> found that mice carrying the R504Q mutation, homologous to human factor V Leiden (R506Q), were viable and fertile and exhibited normal survival. Compared with wildtype mice, adult homozygous mice demonstrated a marked increase in spontaneous tissue fibrin deposition. On a mixed genetic background, homozygous mice developed disseminated intravascular thrombosis in the perinatal period, resulting in significant mortality shortly after birth. <a href="#14" class="mim-tip-reference" title="Cui, J., Eitzman, D. T., Westrick, R. J., Christie, P. D., Xu, Z. J., Yang, A. Y., Purkayastha, A. A., Yang, T. L., Metz, A. L., Gallagher, K. P., Tyson, J. A., Rosenberg, R. D., Ginsburg, D. &lt;strong&gt;Spontaneous thrombosis in mice carrying the factor V Leiden mutation.&lt;/strong&gt; Blood 96: 4222-4226, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11110695/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11110695&lt;/a&gt;]" pmid="11110695">Cui et al. (2000)</a> suggested that these results may explain the high degree of conservation of the R504/R506 activated protein C cleavage site within factor V among mammalian species. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11110695" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="allelicVariants" class="mim-anchor"></a>
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<span href="#mimAllelicVariantsFold" id="mimAllelicVariantsToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>ALLELIC VARIANTS (<a href="/help/faq#1_4"></strong>
</span>
<strong>14 Selected Examples</a>):</strong>
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<a href="/allelicVariants/612309" class="btn btn-default" role="button"> Table View </a>
&nbsp;&nbsp;<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=612309[MIM]" class="btn btn-default mim-tip-hint" role="button" title="ClinVar aggregates information about sequence variation and its relationship to human health." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">ClinVar</a>
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<a id="0001" class="mim-anchor"></a>
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<strong>.0001&nbsp;THROMBOPHILIA DUE TO FACTOR V LEIDEN</strong>
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<span class="mim-text-font">
STROKE, ISCHEMIC, SUSCEPTIBILITY TO, INCLUDED<br />
BUDD-CHIARI SYNDROME, SUSCEPTIBILITY TO, INCLUDED<br />
PREGNANCY LOSS, RECURRENT, SUSCEPTIBILITY TO, 1, INCLUDED
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F5, ARG506GLN
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&nbsp;&nbsp;
<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs6025 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs6025;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs6025?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs6025" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs6025" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
<span class="mim-text-font">
<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000675 OR RCV000000676 OR RCV000023935 OR RCV000205002 OR RCV000454249 OR RCV000616414 OR RCV001095681 OR RCV001806997 OR RCV002399305 OR RCV003227589 OR RCV003493407 OR RCV003764502 OR RCV005049305" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000675, RCV000000676, RCV000023935, RCV000205002, RCV000454249, RCV000616414, RCV001095681, RCV001806997, RCV002399305, RCV003227589, RCV003493407, RCV003764502, RCV005049305" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000675...</a>
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<span class="mim-text-font">
<p>This mutation is commonly referred to as 'factor V Leiden.'</p><p><strong><em>Thrombophilia</em></strong></p><p>
In affected members of a family with thrombophilia due to APC resistance (<a href="/entry/188055">188055</a>), <a href="#4" class="mim-tip-reference" title="Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H. &lt;strong&gt;Mutation in blood coagulation factor V associated with resistance to activated protein C.&lt;/strong&gt; Nature 369: 64-67, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164741&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369064a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164741">Bertina et al. (1994)</a> identified a heterozygous 1691G-A transition in exon 10 of the F5 gene, resulting in an arg506-to-gln (R506Q) substitution. The R506Q substitution prevented inactivation of activated factor V by activated protein C (<a href="/entry/612283">612283</a>), resulting in a tendency to thrombosis. Of note, this family came to attention because of symptomatic protein C deficiency (<a href="/entry/176860">176860</a>). <a href="#4" class="mim-tip-reference" title="Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H. &lt;strong&gt;Mutation in blood coagulation factor V associated with resistance to activated protein C.&lt;/strong&gt; Nature 369: 64-67, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164741&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369064a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164741">Bertina et al. (1994)</a> identified the R506Q mutation in 56 of 64 patients with APC-resistant thrombosis from a larger cohort of 301 consecutive patients with a first episode of deep vein thrombosis. The mutation was homozygous in 6 patients. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8164741" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#22" class="mim-tip-reference" title="Greengard, J. S., Sun, X., Xu, X., Fernandez, J. A., Griffin, J. H., Evatt, B. &lt;strong&gt;Activated protein C resistance caused by arg506gln mutation in factor Va. (Letter)&lt;/strong&gt; Lancet 343: 1361-1362, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7910348/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7910348&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0140-6736(94)92497-x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7910348">Greengard et al. (1994)</a> identified a heterozygous R506Q mutation in 8 patients with APC resistance; 2 were Ashkenazi Jews, 5 were Europeans of varying origins, and 1 was African American. <a href="#60" class="mim-tip-reference" title="Voorberg, J., Roelse, J., Koopman, R., Buller, H., Berends, F., ten Cate, J. W., Mertens, K., van Mourik, J. A. &lt;strong&gt;Association of idiopathic venous thromboembolism with single point-mutation at arg506 of factor V.&lt;/strong&gt; Lancet 343: 1535-1536, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7911872/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7911872&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0140-6736(94)92939-4&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7911872">Voorberg et al. (1994)</a> found the R506Q mutation in 10 of 27 consecutive patients with recurrent thromboembolism. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7910348+7911872" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#3" class="mim-tip-reference" title="Beauchamp, N. J., Daly, M. E., Hampton, K. K., Cooper, P. C., Preston, E., Peake, I. R. &lt;strong&gt;High prevalence of a mutation in the factor V gene within the U.K. population: relationship to activated protein C resistance and familial thrombosis.&lt;/strong&gt; Brit. J. Haemat. 88: 219-222, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7803250/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7803250&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1111/j.1365-2141.1994.tb05005.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7803250">Beauchamp et al. (1994)</a> found the R506Q mutation in all affected members of 2 English families with inherited APC resistance associated with thrombosis. The molecular studies confirmed suspected homozygosity in 2 individuals. The mutation in heterozygous form was also found in approximately 3.5% of the normal population. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7803250" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Among 14,916 apparently healthy men in the Physicians' Health Study, including 121 with deep venous thrombosis, <a href="#52" class="mim-tip-reference" title="Ridker, P. M., Hennekens, C. H., Lindpaintner, K., Stampfer, M. J., Eisenberg, P. R., Miletich, J. P. &lt;strong&gt;Mutation in the gene coding for coagulation factor V and the risk of myocardial infarction, stroke, and venous thrombosis in apparently healthy men.&lt;/strong&gt; New Eng. J. Med. 332: 912-917, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7877648/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7877648&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM199504063321403&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7877648">Ridker et al. (1995)</a> found that the R506Q mutation of the F5 gene was present in 25.8% of men over the age of 60 in whom primary venous thrombosis developed. There was no increased risk for secondary venous thrombosis. The presence of the mutation was not associated with an increased risk of myocardial infarction or stroke. In a follow-up study, of 77 study participants who had a first idiopathic venous thromboembolism, <a href="#53" class="mim-tip-reference" title="Ridker, P. M., Miletich, J. P., Stampfer, M. J., Goldhaber, S. Z., Lindpaintner, K., Hennekens, C. H. &lt;strong&gt;Factor V Leiden and risks of recurrent idiopathic venous thromboembolism.&lt;/strong&gt; Circulation 92: 2800-2802, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7586244/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;7586244&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1161/01.cir.92.10.2800&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="7586244">Ridker et al. (1995)</a> found that factor V Leiden was associated with a 4- to 5-fold increased risk of recurrent thrombosis. The data raised the possibility that patients with idiopathic venous thromboembolism and factor V Leiden may require more prolonged anticoagulation to prevent recurrent disease compared to those without the mutation. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7586244+7877648" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Among 7 families with 11 pseudohomozygotes and 45 relatives, <a href="#6" class="mim-tip-reference" title="Brenner, B., Lanir, N., Thaler, I. &lt;strong&gt;HELLP syndrome associated with factor V R506Q mutation.&lt;/strong&gt; Brit. J. Haemat. 92: 999-1001, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8616100/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8616100&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1996.410947.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8616100">Brenner et al. (1996)</a> observed 2 patients with the HELLP (hemolysis, elevated liver enzymes, and low platelet count) syndrome who were found to be heterozygous for the R506Q mutation. The HELLP syndrome is a severe presentation of preeclampsia (see <a href="/entry/189800">189800</a>). The finding of the R506Q mutation suggested that the pathogenesis of HELLP syndrome may be associated with a thrombotic process. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8616100" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In 50 patients with meningococcal disease and thrombotic complications, <a href="#62" class="mim-tip-reference" title="Westendorp, R. G. J., Reitsma, P. H., Bertina, R. M. &lt;strong&gt;Inherited prethrombotic disorders and infectious purpura.&lt;/strong&gt; Thromb. Haemost. 75: 899-901, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8822583/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8822583&lt;/a&gt;]" pmid="8822583">Westendorp et al. (1996)</a> found no increase in prevalence of the factor V Leiden mutation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8822583" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#17" class="mim-tip-reference" title="de Bruijn, S. F. T. M., Stam, J., Koopman, M. M. W., Vandenbroucke, J. P. &lt;strong&gt;Case-control study of risk of cerebral sinus thrombosis in oral contraceptive users and in carriers of hereditary prothrombotic conditions.&lt;/strong&gt; Brit. Med. J. 316: 589-592, 1998. Note: Erratum: J. Biol. Chem. 264: 21433 only, 1989.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9518910/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9518910&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/bmj.316.7131.589&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9518910">De Bruijn et al. (1998)</a> studied risk factors in cerebral venous sinus thrombosis in women. They found a clear and significant excess of both hereditary prothrombotic conditions, including factor V Leiden, and oral contraceptive use in 40 prospectively ascertained patients compared to 2,248 randomly sampled controls. The authors concluded that the presence of prothrombotic conditions like the factor V Leiden mutation and the use of oral contraceptives increase the risk of this rare condition in a multiplicative fashion. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9518910" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#21" class="mim-tip-reference" title="Gerhardt, A., Scharf, R. E., Beckmann, M. W., Struve, S., Bender, H. G., Pillny, M., Sandmann, W., Zotz, R. B. &lt;strong&gt;Prothrombin and factor V mutations in women with a history of thrombosis during pregnancy and the puerperium.&lt;/strong&gt; New Eng. J. Med. 342: 374-380, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10666427/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10666427&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM200002103420602&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10666427">Gerhardt et al. (2000)</a> studied 119 women with a history of venous thromboembolism during pregnancy and the puerperium and 233 age-matched normal women. Among the women with a history of venous thromboembolism, a prevalence of factor V Leiden was 43.7%, as compared with 7.7% among the normal women (relative risk of venous thromboembolism, 9.3). The prevalence of the 20210G-A prothrombin mutation (<a href="/entry/176930#0009">176930.0009</a>) was 16.9% in the thromboembolism group as compared with 1.3% in the control group. The frequency of both factor V Leiden and the 20210G-A prothrombin mutation was 9.3% in the thromboembolism group as compared with 0 in the control group (estimated OR, 107). Assuming an overall risk of 1 in 1,500 pregnancies, the risk of thrombosis among carriers of factor V Leiden was 0.2%, among carriers of the 20210G-A prothrombin mutation, 0.5%, and among carriers of both defects, 4.6%, as calculated in a multivariate analysis. Thus, the risk among women with both mutations was disproportionately higher than that among women with only 1 mutation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10666427" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In a population-based cohort study of 9,253 Danish adults, <a href="#33" class="mim-tip-reference" title="Juul, K., Tybjaerg-Hansen, A., Schnohr, P., Nordestgaard, B. G. &lt;strong&gt;Factor V Leiden and the risk for venous thromboembolism in the adult Danish population.&lt;/strong&gt; Ann. Intern. Med. 140: 330-337, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14996674/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14996674&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.7326/0003-4819-140-5-200403020-00008&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14996674">Juul et al. (2004)</a> found that heterozygotes and homozygotes for factor V Leiden had 2.7 and 18 times higher risk for venous thromboembolism, respectively, than noncarriers. Absolute 10-year risks for thromboembolism among heterozygote and homozygote nonsmokers younger than age 40 years who were not overweight were 0.7% and 3%, respectively. The 10-year risks in heterozygotes and homozygotes older than age 60 years who smoked and were overweight were 10% and 51%, respectively. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14996674" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#36" class="mim-tip-reference" title="Kemkes-Matthes, B., Matthes, K. J., Souri, M., Koseki-Kuno, S., Ichinose, A. &lt;strong&gt;R225H amino acid substitution of protein Z identified in patients with factor V Leiden mutation.&lt;/strong&gt; Brit. J. Haemat. 128: 248-252, 2005.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/15638861/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;15638861&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1111/j.1365-2141.2004.05297.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="15638861">Kemkes-Matthes et al. (2005)</a> found that presence of a heterozygous or homozygous arg225-to-his (R225H) substitution in exon 8 of the protein Z gene (PROZ; <a href="/entry/176895">176895</a>) was associated with a higher frequency of thromboembolic complications in patients carrying the factor V Leiden mutation, although plasma levels of protein Z were not different between those with or without the R225H substitution. In a study of 134 carriers of factor V Leiden, the R225H mutation was found in 11 (14.4%) of 76 patients with thromboembolic events and in only 3 (5.1%) of 58 patients who did not have thromboembolic events. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15638861" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Stroke</em></strong></p><p>
In a comprehensive metaanalysis of 26 case-control studies including 4,588 white adult patients, <a href="#7" class="mim-tip-reference" title="Casas, J. P., Hingorani, A. D., Bautista, L. E., Sharma, P. &lt;strong&gt;Meta-analysis of genetic studies in ischemic stroke: thirty-two genes involving approximately 18000 cases and 58000 controls.&lt;/strong&gt; Arch. Neurol. 61: 1652-1662, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/15534175/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;15534175&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1001/archneur.61.11.1652&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="15534175">Casas et al. (2004)</a> found a statistically significant association between ischemic stroke (<a href="/entry/601367">601367</a>) and the R506Q substitution (OR, 1.33). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15534175" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Budd-Chiari Syndrome</em></strong></p><p>
<a href="#43" class="mim-tip-reference" title="Mahmoud, A. E. A., Elias, E., Beauchamp, N., Wilde, J. T. &lt;strong&gt;Prevalence of the factor V Leiden mutation in hepatic and portal vein thrombosis.&lt;/strong&gt; Gut 40: 798-800, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9245936/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9245936&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/gut.40.6.798&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9245936">Mahmoud et al. (1997)</a> reported the incidence of the factor V Leiden mutation in Budd-Chiari syndrome (<a href="/entry/600880">600880</a>) and portal vein thrombosis. The R506Q mutation was seen in 7 (23%) of 30 patients with Budd-Chiari syndrome (6 heterozygotes and 1 homozygote), 3 of whom had coexistent myeloproliferative disease. Only 1 (3%) of 32 patients with portal vein thrombosis was found to have the R506Q mutation. The mutation was found in 3 (6%) of the 54 controls, who had liver disease but no history of thrombophilia. <a href="#43" class="mim-tip-reference" title="Mahmoud, A. E. A., Elias, E., Beauchamp, N., Wilde, J. T. &lt;strong&gt;Prevalence of the factor V Leiden mutation in hepatic and portal vein thrombosis.&lt;/strong&gt; Gut 40: 798-800, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9245936/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9245936&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/gut.40.6.798&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9245936">Mahmoud et al. (1997)</a> concluded that the R506Q mutation seems to be an important factor in the pathogenesis of Budd-Chiari syndrome but not of portal vein thrombosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9245936" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#38" class="mim-tip-reference" title="Leebeek, F. W. G., Lameris, J. S., van Buuren, H. R., Gomez, E., Madretsma, S., Sonneveld, P. &lt;strong&gt;Budd-Chiari syndrome, portal vein and mesenteric vein thrombosis in a patient homozygous for factor V Leiden mutation treated by TIPS and thrombolysis.&lt;/strong&gt; Brit. J. Haemat. 102: 929-931, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9734642/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9734642&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1998.00860.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9734642">Leebeek et al. (1998)</a> described a 27-year-old woman, homozygous for factor V Leiden, who developed Budd-Chiari syndrome caused by hepatic vein thrombosis in association with portal and mesenteric vein thrombosis. <a href="#26" class="mim-tip-reference" title="Gurakan, F., Gurgey, A., Bakkaloglu, A., Kocak, N. &lt;strong&gt;Homozygous factor V Leiden mutation in a child with Budd-Chiari syndrome.&lt;/strong&gt; J. Pediat. Gastroent. Nutr. 28: 516-517, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10328130/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10328130&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1097/00005176-199905000-00016&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10328130">Gurakan et al. (1999)</a> described a child with Budd-Chiari syndrome who was homozygous for the factor V Leiden mutation. The authors noted that Budd-Chiari syndrome is rare in children. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=9734642+10328130" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Recurrent Pregnancy Loss</em></strong></p><p>
In a study of 67 women with a first episode of unexplained late fetal loss (fetal death after 20 weeks or more of gestation; <a href="/entry/614389">614389</a>) and 232 women who had had 1 or more normal pregnancies with no late fetal loss, <a href="#46" class="mim-tip-reference" title="Martinelli, I., Taioli, E., Cetin, I., Marinoni, A., Gerosa, S., Villa, M. V., Bozzo, M., Mannucci, P. M. &lt;strong&gt;Mutations in coagulation factors in women with unexplained late fetal loss.&lt;/strong&gt; New Eng. J. Med. 343: 1015-1018, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11018168/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11018168&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM200010053431405&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11018168">Martinelli et al. (2000)</a> found that both factor V Leiden and a 20210G-A mutation in prothrombin (<a href="/entry/176930#0009">176930.0009</a>) were associated with an approximate tripling of the risk of late fetal loss. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11018168" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Evolution</em></strong></p><p>
<a href="#66" class="mim-tip-reference" title="Zivelin, A., Mor-Cohen, R., Kovalsky, V., Kornbrot, N., Conard, J., Peyvandi, F., Kyrle, P. A., Bertina, R., Peyvandi, F., Emmerich, J., Seligsohn, U. &lt;strong&gt;Prothrombin 20210G-A is an ancestral prothrombotic mutation that occurred in whites approximately 24,000 years ago.&lt;/strong&gt; Blood 107: 4666-4668, 2006.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16493002/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;16493002&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood-2005-12-5158&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="16493002">Zivelin et al. (2006)</a> estimated the age of the factor V Leiden mutation to be 21,340 years. Like the prothrombin 20210G-A mutation (<a href="/entry/176930#0009">176930.0009</a>), the mutation occurred in whites toward the end of the last glaciation and their wide distribution in whites suggested selective evolutionary advantages. A selective disadvantage (i.e., thrombosis) is unlikely because until recent centuries humans did not live long enough to manifest a meaningful incidence of thrombosis. On the other hand, augmented hemostasis conceivably conferred a selective advantage by reducing mortality from postpartum hemorrhage, hemorrhagia associated with severe iron deficiency anemia, and posttraumatic bleeding. For example, <a href="#40" class="mim-tip-reference" title="Lindqvist, P. G., Svensson, P. J., Dahlback, B., Marsal, K. &lt;strong&gt;Factor V Q-506 mutation (activated protein C resistance) associated with reduced intrapartum blood loss: a possible evolutionary selection mechanism.&lt;/strong&gt; Thromb. Haemost. 79: 69-73, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9459326/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9459326&lt;/a&gt;]" pmid="9459326">Lindqvist et al. (1998)</a> found that the amount of blood lost during labor was significantly smaller in heterozygotes with factor V Leiden than in women not carrying the mutation, and <a href="#41" class="mim-tip-reference" title="Lindqvist, P. G., Zoller, B., Dahlback, B. &lt;strong&gt;Improved hemoglobin status and reduced menstrual blood loss among female carriers of factor V Leiden: an evolutionary advantage? (Letter)&lt;/strong&gt; Thromb. Haemost. 86: 1122-1123, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11686338/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11686338&lt;/a&gt;]" pmid="11686338">Lindqvist et al. (2001)</a> found that profuse menstrual bleeding was significantly less common in factor V heterozygotes. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=9459326+16493002+11686338" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Among 122 pregnant women with preeclampsia or intrauterine growth retardation, <a href="#40" class="mim-tip-reference" title="Lindqvist, P. G., Svensson, P. J., Dahlback, B., Marsal, K. &lt;strong&gt;Factor V Q-506 mutation (activated protein C resistance) associated with reduced intrapartum blood loss: a possible evolutionary selection mechanism.&lt;/strong&gt; Thromb. Haemost. 79: 69-73, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9459326/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9459326&lt;/a&gt;]" pmid="9459326">Lindqvist et al. (1998)</a> found a significantly reduced risk of intrapartum bleeding complications in the APC-resistant subgroup compared to non-APC-resistant subgroup, as indicated by reduced intrapartum blood loss and pre- and postpartum hemoglobin measurements. <a href="#40" class="mim-tip-reference" title="Lindqvist, P. G., Svensson, P. J., Dahlback, B., Marsal, K. &lt;strong&gt;Factor V Q-506 mutation (activated protein C resistance) associated with reduced intrapartum blood loss: a possible evolutionary selection mechanism.&lt;/strong&gt; Thromb. Haemost. 79: 69-73, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9459326/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9459326&lt;/a&gt;]" pmid="9459326">Lindqvist et al. (1998)</a> speculated that the remarkably high prevalence of a potentially harmful factor V gene mutation in the general population may be the result of an evolutionary selection mechanism conferring such survival advantages as reduction in the risk of intrapartum bleeding. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9459326" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Pseudohomozygosity for Factor V Leiden</em></strong></p><p>
<a href="#64" class="mim-tip-reference" title="Zehnder, J. L., Hiraki, D. D., Jones, C. D., Gross, N., Grumet, F. C. &lt;strong&gt;Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford.&lt;/strong&gt; Thromb. Haemost. 82: 1097-1099, 1999. Note: Erratum: Thromb. Haemost. 82: XII only, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10494770/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10494770&lt;/a&gt;]" pmid="10494770">Zehnder et al. (1999)</a> identified a man with thrombophilia who was found to be compound heterozygous for factor V Leiden and a null allele of the F5 gene (<a href="#0005">612309.0005</a>). The patient had 50% of normal levels of F5, all of which was of the Leiden type; hence he was 'pseudohomozygous' for factor V Leiden. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10494770" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Digenic Inheritance</em></strong></p><p>
<a href="#37" class="mim-tip-reference" title="Koeleman, B. P. C., Reitsma, P. H., Allaart, C. F., Bertina, R. M. &lt;strong&gt;Activated protein C resistance as an additional risk factor for thrombosis in protein C-deficient families.&lt;/strong&gt; Blood 84: 1031-1035, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8049422/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8049422&lt;/a&gt;]" pmid="8049422">Koeleman et al. (1994)</a> found that heterozygous carriers of both the R506Q and a mutation in the protein C gene were at higher risk of thrombosis than were patients with either defect alone. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8049422" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#55" class="mim-tip-reference" title="Talmon, T., Scharf, J., Mayer, E., Lanir, N., Miller, B., Brenner, B. &lt;strong&gt;Retinal arterial occlusion in a child with factor V Leiden and thermolabile methylene tetrahydrofolate reductase mutations.&lt;/strong&gt; Am. J. Ophthal. 124: 689-691, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9372726/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9372726&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0002-9394(14)70910-9&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9372726">Talmon et al. (1997)</a> described retinal arterial occlusion in a child heterozygous for the factor V R506Q mutation and homozygous for thermolabile methylene tetrahydrofolate reductase (<a href="/entry/236250#0003">236250.0003</a>). Thus, the coexistence of 2 mild hereditary thrombophilic states can result in severe thrombotic manifestations in young people. Although factor V Leiden had been associated clearly with venous thrombosis, most studies had failed to demonstrate an association between isolated factor V Leiden and arterial thrombosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9372726" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#18" class="mim-tip-reference" title="De Stefano, V., Martinelli, I., Mannucci, P. M., Paciaroni, K., Chiusolo, P., Casorelli, I., Rossi, E., Leone, G. &lt;strong&gt;The risk of recurrent deep venous thrombosis among heterozygous carriers of both factor V Leiden and the G20210A prothrombin mutation.&lt;/strong&gt; New Eng. J. Med. 341: 801-806, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10477778/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10477778&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1056/NEJM199909093411104&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="10477778">De Stefano et al. (1999)</a> examined the relative risk of recurrent deep venous thrombosis using a proportional-hazards model. The authors found that whereas patients who were heterozygous for factor V Leiden alone had a risk of recurrent deep venous thrombosis that was similar to that among patients who had neither mutation, patients who were heterozygous for both factor V Leiden and prothrombin 20210G-A (<a href="/entry/176930#0009">176930.0009</a>) had a 2.6-fold higher risk of recurrent thrombosis than did carriers of factor V Leiden alone. <a href="#48" class="mim-tip-reference" title="Meinardi, J. R., Pelsma, P. M., Koning, H., van der Meer, J., Middeldorp, S., Buller, H. R., Hamulyak, K. &lt;strong&gt;Double-homozygosity for factor V Leiden and the prothrombin gene G20210A variant in a young patient with idiopathic venous thrombosis. (Letter)&lt;/strong&gt; Blood 94: 1828-1829, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10507841/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10507841&lt;/a&gt;]" pmid="10507841">Meinardi et al. (1999)</a> described double homozygosity for factor V Leiden and prothrombin 20210G-A in a 34-year-old man with idiopathic venous thrombosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=10477778+10507841" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#49" class="mim-tip-reference" title="Meyer, M., Kutscher, G., Vogel, G. &lt;strong&gt;Simultaneous genotyping for factor V Leiden and prothrombin G20210A variant by a multiplex PCR-SSCP assay on whole blood. (Letter)&lt;/strong&gt; Thromb. Haemost. 81: 162-163, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10348711/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10348711&lt;/a&gt;]" pmid="10348711">Meyer et al. (1999)</a> described a method for simultaneously genotyping for factor V Leiden and the prothrombin 20210G-A variant by a multiplex PCR-SSCP assay on whole blood. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10348711" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><strong><em>Population Studies</em></strong></p><p>
<a href="#44" class="mim-tip-reference" title="Majerus, P. W. &lt;strong&gt;Bad blood by mutation.&lt;/strong&gt; Nature 369: 14-15, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164730/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164730&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369014a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164730">Majerus (1994)</a> quoted estimates that 2 to 4% of the Dutch population and 7% of the Swedish population carried the factor V Leiden allele (R506Q; <a href="#0001">612309.0001</a>). The high frequency of a single factor V mutation in diverse groups of people raised the question of whether positive selection pressure was involved in maintaining it in the population. <a href="#44" class="mim-tip-reference" title="Majerus, P. W. &lt;strong&gt;Bad blood by mutation.&lt;/strong&gt; Nature 369: 14-15, 1994.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8164730/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8164730&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/369014a0&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8164730">Majerus (1994)</a> suggested that a slight thrombotic tendency may confer some advantage in fetal implantation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8164730" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In a population study in southern Germany, <a href="#5" class="mim-tip-reference" title="Braun, A., Muller, B., Rosche, A. A. &lt;strong&gt;Population study of the G1691A mutation (R506Q, FV Leiden) in the human factor V gene that is associated with resistance to activated protein C.&lt;/strong&gt; Hum. Genet. 97: 263-264, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8566967/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;8566967&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/BF02265279&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="8566967">Braun et al. (1996)</a> found that 7.8% of 180 unrelated individuals were heterozygous for the factor V Leiden mutation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8566967" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In a multiethnic survey of 602 Americans, <a href="#23" class="mim-tip-reference" title="Gregg, J. P., Yamane, A. J., Grody, W. W. &lt;strong&gt;Prevalence of the factor V-Leiden mutation in four distinct American ethnic populations.&lt;/strong&gt; Am. J. Med. Genet. 73: 334-336, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9415695/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9415695&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/(sici)1096-8628(19971219)73:3&lt;334::aid-ajmg20&gt;3.0.co;2-j&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9415695">Gregg et al. (1997)</a> found that Hispanic Americans had the highest frequency of the Leiden mutant allele, 1.65%, while African Americans had a somewhat lower frequency, 0.87%. No instances of the Leiden mutation were found in 191 Asian Americans or 54 Native Americans tested. These results indicated that the Leiden mutation segregates in populations with significant Caucasian admixture and is rare in genetically distant non-European groups. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9415695" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#27" class="mim-tip-reference" title="Gurgey, A., Mesci, L. &lt;strong&gt;The prevalence of factor V Leiden (1691G-A) mutation in Turkey.&lt;/strong&gt; Turk. J. Pediat. 39: 313-315, 1997.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9339109/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9339109&lt;/a&gt;]" pmid="9339109">Gurgey and Mesci (1997)</a> determined that the F5 Leiden allele has a frequency of 8% in the Turkish population. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9339109" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#12" class="mim-tip-reference" title="Chan, W. P., Lee, C. K., Kwong, Y. L., Lam, C. K., Liang, R. &lt;strong&gt;A novel mutation of arg306 of factor V gene in Hong Kong Chinese.&lt;/strong&gt; Blood 91: 1135-1139, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9454741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9454741&lt;/a&gt;]" pmid="9454741">Chan et al. (1998)</a> found that the R506Q mutation was rare among Hong Kong Chinese, as it was not detected among 83 unrelated Hong Kong Chinese, 43 of whom had deep venous thromboses. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9454741" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0002&nbsp;FACTOR V HONG KONG</strong>
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F5, ARG306GLY
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs118203905 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203905;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs118203905?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203905" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203905" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000677 OR RCV001753395 OR RCV002269817 OR RCV003761734" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000677, RCV001753395, RCV002269817, RCV003761734" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000677...</a>
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<p>In 2 patients with deep vein thrombosis and 1 nonthrombotic individual, <a href="#12" class="mim-tip-reference" title="Chan, W. P., Lee, C. K., Kwong, Y. L., Lam, C. K., Liang, R. &lt;strong&gt;A novel mutation of arg306 of factor V gene in Hong Kong Chinese.&lt;/strong&gt; Blood 91: 1135-1139, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9454741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9454741&lt;/a&gt;]" pmid="9454741">Chan et al. (1998)</a> identified a 1090A-G sequence change in exon 7 of the F5 gene, resulting in an arg306-to-gly (R306G) substitution. Fresh blood samples available from 1 of them showed no resistance to activated protein C. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9454741" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#39" class="mim-tip-reference" title="Liang, R., Lee, C. K., Wat, M. S., Kwong, Y. L., Lam, C. K., Liu, H. W. &lt;strong&gt;Clinical significance of arg306 mutations of factor V gene. (Letter)&lt;/strong&gt; Blood 92: 2599-2600, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9746807/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9746807&lt;/a&gt;]" pmid="9746807">Liang et al. (1998)</a> found that the mutant R306G protein retained susceptibility to cleavage by activated protein C. In contrast, the R306T substitution (<a href="#0003">612309.0003</a>) conferred resistance to protein C cleavage. In Hong Kong, R306G was found in 4 of 89 (4.5%) healthy blood donors and 8 of 260 (3.1%) diabetic subjects. There was no statistically significant difference between these 2 figures and the incidence rate of 2 in 43 (4.7%) previously reported by <a href="#12" class="mim-tip-reference" title="Chan, W. P., Lee, C. K., Kwong, Y. L., Lam, C. K., Liang, R. &lt;strong&gt;A novel mutation of arg306 of factor V gene in Hong Kong Chinese.&lt;/strong&gt; Blood 91: 1135-1139, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9454741/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9454741&lt;/a&gt;]" pmid="9454741">Chan et al. (1998)</a> in thrombotic patients. The data suggested that the R306G variant does not predispose to clinical thrombosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=9454741+9746807" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0003&nbsp;THROMBOPHILIA DUE TO ACTIVATED PROTEIN C RESISTANCE</strong>
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F5, ARG306THR
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs118203906 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203906;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs118203906?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203906" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203906" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000678" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000678" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000678</a>
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<p>In a patient with thrombophilia due to APC resistance (<a href="/entry/188055">188055</a>), <a href="#63" class="mim-tip-reference" title="Williamson, D., Brown, K., Luddington, R., Baglin, C., Baglin, T. &lt;strong&gt;Factor V Cambridge: a new mutation (arg306-to-thr) associated with resistance to activated protein C.&lt;/strong&gt; Blood 91: 1140-1144, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9454742/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9454742&lt;/a&gt;]" pmid="9454742">Williamson et al. (1998)</a> identified a G-to-C transversion in the F5 gene, resulting in an arg306-to-thr (R306T) substitution. The mutation was also present in a first-degree relative with APC resistance. This was the first description of a mutation affecting the arg306 APC cleavage site, and the only mutation other than factor V Leiden (<a href="#0001">612309.0001</a>) found in association with APC resistance. Discovered at Addenbrooke's Hospital in Cambridge, England, the variant was referred to as factor V Cambridge. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9454742" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="0004" class="mim-anchor"></a>
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<strong>.0004&nbsp;FACTOR V DEFICIENCY</strong>
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F5, 4-BP DEL, EX13
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs2101818393 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs2101818393;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs2101818393" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs2101818393" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000680" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000680" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000680</a>
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<p>In a young girl with very mild bleeding symptoms and undetectable levels of plasma factor V antigen and activity (<a href="/entry/227400">227400</a>), <a href="#24" class="mim-tip-reference" title="Guasch, J. F., Cannegieter, S., Reitsma, P. H., van&#x27;t Veer-Korthof, E. T., Bertina, R. M. &lt;strong&gt;Severe coagulation factor V deficiency caused by a 4 bp deletion in the factor V gene.&lt;/strong&gt; Brit. J. Haemat. 101: 32-39, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9576178/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9576178&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1998.00664.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9576178">Guasch et al. (1998)</a> identified a homozygous 4-bp deletion in exon 13 of the F5 gene, resulting in a frameshift and premature protein termination. The truncated factor V molecule was predicted to lack part of the B domain and the complete light chain. However, no factor V heavy chain could be detected in the plasma of the patient or in the patient's platelets. This was the first reported mutation in the factor V gene that predicted a type I quantitative factor V deficiency. The patient presented at the age of 3 years with prolonged bleeding from a cut in her upper lip after trauma. The parents were consanguineous, and each had a plasma level of factor V activity of about 50% of normal. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9576178" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="0005" class="mim-anchor"></a>
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<strong>.0005&nbsp;FACTOR V DEFICIENCY</strong>
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F5, 4-BP INS, 2805ATTG
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs773569662 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs773569662;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs773569662?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs773569662" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs773569662" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000681" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000681" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000681</a>
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<p><a href="#64" class="mim-tip-reference" title="Zehnder, J. L., Hiraki, D. D., Jones, C. D., Gross, N., Grumet, F. C. &lt;strong&gt;Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford.&lt;/strong&gt; Thromb. Haemost. 82: 1097-1099, 1999. Note: Erratum: Thromb. Haemost. 82: XII only, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10494770/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10494770&lt;/a&gt;]" pmid="10494770">Zehnder et al. (1999)</a> identified a man with thrombophilia (<a href="/entry/188055">188055</a>) who was found to be compound heterozygous for factor V Leiden (<a href="#0001">612309.0001</a>) and a null allele of the F5 gene resulting from a 4-bp insertion (2805insATTG) in exon 13. The insertion resulted in a frameshift and premature termination. The patient had 50% of normal levels of F5, all of which was of the Leiden type; hence he was 'pseudohomozygous' for factor V Leiden. Each of his 2 children inherited a different paternal factor V allele: the daughter was heterozygous for factor V Leiden, with 100% factor V activity, and the son was heterozygous for factor V deficiency, with 50% factor V activity and no factor V Leiden allele. The 4-bp insertion, designated factor V Stanford, was thus a factor V deficiency (<a href="/entry/227400">227400</a>) allele resulting in loss of protein function. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10494770" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0006&nbsp;FACTOR V DEFICIENCY</strong>
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F5, 8-BP DEL, NT1131
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs2101829195 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs2101829195;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs2101829195" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs2101829195" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000682" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000682" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000682</a>
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<p>In a 19-year-old Korean woman with severe factor V deficiency (<a href="/entry/227400">227400</a>), <a href="#59" class="mim-tip-reference" title="van Wijk, R., Nieuwenhuis, K., van den Berg, M., Huizinga, E. G., van der Meijden, B. B., Kraaijenhagen, R. J., van Solinge, W. W. &lt;strong&gt;Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency.&lt;/strong&gt; Blood 98: 358-367, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11435304/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11435304&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood.v98.2.358&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11435304">van Wijk et al. (2001)</a> identified compound heterozygosity for 2 mutations in the F5 gene: an 8-bp deletion in exon 7, at nucleotides 1131-1139, resulting in a frameshift and a premature stop codon (factor V Seoul-1), and a 5279A-G transition in exon 15 resulting in a tyr1702-to-cys (Y1702C; <a href="#0007">612309.0007</a>) substitution (factor V Seoul-2). The patient developed bleeding of the soft tissue of the mouth at the age of 19 months, experienced a large subdural hematoma at the age of 4 years, and suffered soft tissue bleeds of the mouth, epistaxis, and hematomas for which she received fresh frozen plasma once every 3 months. In recent years her bleeding pattern changed to spontaneous muscle bleedings. The patient was an orphan who had been adopted by a Dutch family at the age of 3 months and had no known relatives; thus it was not possible to determine directly that the Y1702C mutation was in trans to the 8-bp deletion. However, the same Y1702C mutation, associated with factor V deficiency, had been reported by <a href="#11" class="mim-tip-reference" title="Castoldi, E., Simioni, P., Kalafatis, M., Lunghi, B., Tormene, D., Girelli, D., Girolami, A., Bernardi, F. &lt;strong&gt;Combinations of 4 mutations (FV R506Q, FV H1299R, FV Y1702C, PT 20210G/A) affecting the prothrombinase complex in a thrombophilic family.&lt;/strong&gt; Blood 96: 1443-1448, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10942390/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;10942390&lt;/a&gt;]" pmid="10942390">Castoldi et al. (2000)</a>. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=11435304+10942390" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0007&nbsp;FACTOR V DEFICIENCY</strong>
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F5, TYR1702CYS
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs118203907 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203907;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs118203907?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203907" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203907" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000683 OR RCV003595850 OR RCV004766973" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000683, RCV003595850, RCV004766973" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000683...</a>
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<p>For discussion of the 5279A-G transition in exon 15 of the F5 gene, resulting in a tyr1702-to-cys (Y1702C) substitution (factor V Seoul-2), that was found in compound heterozygous state in a 19-year-old Korean woman with severe factor V deficiency (<a href="/entry/227400">227400</a>) by <a href="#59" class="mim-tip-reference" title="van Wijk, R., Nieuwenhuis, K., van den Berg, M., Huizinga, E. G., van der Meijden, B. B., Kraaijenhagen, R. J., van Solinge, W. W. &lt;strong&gt;Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency.&lt;/strong&gt; Blood 98: 358-367, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11435304/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11435304&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood.v98.2.358&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11435304">van Wijk et al. (2001)</a>, see <a href="#0006">612309.0006</a>. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11435304" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="0008" class="mim-anchor"></a>
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<strong>.0008&nbsp;FACTOR V DEFICIENCY</strong>
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F5, GLN773TER
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs118203908 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203908;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs118203908?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203908" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203908" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000684" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000684" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000684</a>
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<p>In a 15-year-old girl from Morocco, the daughter of first-cousin parents, <a href="#59" class="mim-tip-reference" title="van Wijk, R., Nieuwenhuis, K., van den Berg, M., Huizinga, E. G., van der Meijden, B. B., Kraaijenhagen, R. J., van Solinge, W. W. &lt;strong&gt;Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency.&lt;/strong&gt; Blood 98: 358-367, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11435304/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11435304&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood.v98.2.358&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11435304">van Wijk et al. (2001)</a> found that severe factor V deficiency with F5 activity less than 1% (<a href="/entry/227400">227400</a>) was caused by a homozygous 2491C-T transition in exon 13 of the F5 gene, resulting in a gln773-to-ter (Q773X) substitution. The patient was identified in the course of family screening. A 23-year-old brother, previously described by <a href="#56" class="mim-tip-reference" title="Tanis, B. C., van der Meer, F. J., Bloem, R. M., Vlasveld, L. T. &lt;strong&gt;Successful excision of a pseudotumour in a congenitally factor V deficient patient.&lt;/strong&gt; Brit. J. Haemat. 100: 380-382, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9488630/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;9488630&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.1998.00570.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="9488630">Tanis et al. (1998)</a>, also had severe factor V deficiency and prolonged bleeding after injuries. This mutation was designated factor V Casablanca. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=11435304+9488630" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="0009" class="mim-anchor"></a>
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<strong>.0009&nbsp;FACTOR V DEFICIENCY</strong>
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F5, ARG1133TER
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs118203909 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203909;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs118203909?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203909" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203909" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000685" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000685" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000685</a>
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<p>In 2 seemingly unrelated southern Italian probands with undetectable plasma levels of factor V antigen and activity (<a href="/entry/227400">227400</a>), <a href="#58" class="mim-tip-reference" title="van Wijk, R., Montefusco, M. C., Duga, S., Asselta, R., van Solinge, W., Malcovati, M., Tenchini, M. L., Mannucci, P. M. &lt;strong&gt;Coexistence of a novel homozygous nonsense mutation in exon 13 of the factor V gene with the homozygous Leiden mutation in two unrelated patients with severe factor V deficiency.&lt;/strong&gt; Brit. J. Haemat. 114: 871-874, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11564077/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11564077&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.2001.03016.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11564077">van Wijk et al. (2001)</a> found homozygosity for the factor V Leiden mutation (<a href="#0001">612309.0001</a>) in cis with a homozygous 3571C-T transition in exon 13 of the F5 gene, resulting in an arg1133-to-ter (R1133X) substitution and a truncated factor V molecule. Haplotype analysis suggested that an ancestral F5 Leiden allele, carrying the R1133X nonsense mutation in cis, diverged into the relatively rare haplotype identified in 1 of the probands by an intragenic crossing-over. Although the deficiency of the coagulation factor was profound, it was associated with only mild bleeding diathesis in 1 proband and the other proband was asymptomatic. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11564077" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="0010" class="mim-anchor"></a>
<h4>
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<strong>.0010&nbsp;FACTOR V DEFICIENCY</strong>
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F5, 1-BP DEL, 2952T
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs765982916 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs765982916;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs765982916?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs765982916" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs765982916" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000851763 OR RCV003596549" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000851763, RCV003596549" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000851763...</a>
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<p>In a male infant with severe bleeding tendency and undetectable factor V activity (<a href="/entry/227400">227400</a>), <a href="#1" class="mim-tip-reference" title="Ajzner, E., Balogh, I., Szabo, T., Marosi, A., Haramura, G., Muszbek, L. &lt;strong&gt;Severe coagulation factor V deficiency caused by 2 novel frameshift mutations: 2952delT in exon 13 and 5493insG in exon 16 of factor 5 gene.&lt;/strong&gt; Blood 99: 702-705, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11781258/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11781258&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood.v99.2.702&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11781258">Ajzner et al. (2002)</a> found compound heterozygosity for 2 mutations in the F5 gene: a 1-bp deletion in exon 13 (2952delT) and a 1-bp insertion in exon 16 (5493insG; <a href="#0011">612309.0011</a>). Both mutations introduced a frameshift and a premature stop at codons 930 and 1776, respectively. The proband's father and mother were heterozygous for the 2 mutations, respectively. Both mutations resulted in the synthesis of truncated proteins lacking complete light chain or its C-terminal part. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11781258" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0011&nbsp;FACTOR V DEFICIENCY</strong>
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F5, 1-BP INS, 5493G
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs2101810760 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs2101810760;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs2101810760" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs2101810760" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000687" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000687" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000687</a>
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<p>For discussion of the 1-bp insertion (5493insG) in exon 16 of the F5 gene, resulting in a frameshift and a premature stop at codon 1776, that was found in compound heterozygous state in a male infant with severe bleeding tendency and undetectable factor V activity (<a href="/entry/227400">227400</a>) by <a href="#1" class="mim-tip-reference" title="Ajzner, E., Balogh, I., Szabo, T., Marosi, A., Haramura, G., Muszbek, L. &lt;strong&gt;Severe coagulation factor V deficiency caused by 2 novel frameshift mutations: 2952delT in exon 13 and 5493insG in exon 16 of factor 5 gene.&lt;/strong&gt; Blood 99: 702-705, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11781258/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;11781258&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood.v99.2.702&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="11781258">Ajzner et al. (2002)</a>, see <a href="#0010">612309.0010</a>. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11781258" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0012&nbsp;FACTOR V DEFICIENCY</strong>
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F5, ARG2074CYS
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown"><span class="text-primary">&#x25cf;</span> rs118203910 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203910;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://gnomad.broadinstitute.org/variant/rs118203910?dataset=gnomad_r2_1" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'gnomad.broadinstitute.org'})" style="padding-left: 8px;"><span class="text-primary">&#x25cf;</span> gnomAD</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203910" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203910" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000688" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000688" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000688</a>
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<p>In a 22-year-old Italian woman in whom factor V deficiency (<a href="/entry/227400">227400</a>) was first diagnosed at the age of 10 years after abnormal coagulation screening tests were found preceding an operation for strabismus, <a href="#19" class="mim-tip-reference" title="Duga, S., Montefusco, M. C., Asselta, R., Malcovati, M., Peyvandi, F., Santagostino, E., Mannucci, P. M., Tenchini, M. L. &lt;strong&gt;Arg2074-to-cys missense mutation in the C2 domain of factor V causing moderately severe factor V deficiency: molecular characterization by expression of the recombinant protein.&lt;/strong&gt; Blood 101: 173-177, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12393490/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;12393490&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood-2002-06-1928&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="12393490">Duga et al. (2003)</a> identified a homozygous 6394C-T transition at in exon 23 of the F5 gene, resulting in an arg2074-to-cys (R2074C) change in the C2 domain of the protein. Functional studies showed that this substitution impaired both factor V secretion and its activity. The patient's menstruation was normal and her only bleeding symptom was easy bruising after minor trauma. Her parents, apparently nonconsanguineous, were asymptomatic and had factor V functional and antigen levels typical of heterozygotes. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12393490" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0013&nbsp;THROMBOPHILIA DUE TO ACTIVATED PROTEIN C RESISTANCE</strong>
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F5, ILE359THR
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs118203911 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203911;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203911" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203911" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000689" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000689" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000689</a>
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<p>In 2 Caucasian brothers with thrombophilia due to APC resistance (<a href="/entry/188055">188055</a>), <a href="#50" class="mim-tip-reference" title="Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B. &lt;strong&gt;Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.&lt;/strong&gt; Brit. J. Haemat. 123: 496-501, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14617013/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14617013&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.2003.04624.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14617013">Mumford et al. (2003)</a> identified compound heterozygosity for 2 mutations in the F5 gene: a 1250T-C transition resulting in an ile359-to-thr (I359T) substitution, and a 529G-T transversion resulting in a glu119-to-ter mutation (E119X; <a href="#0014">612309.0014</a>). Both brothers developed spontaneous venous thromboses in the second decade of life. One presented at the age of 14 years with thrombosis of the right femoral vein and inferior vena cava; an older brother suffered recurrent episodes of femoral vein thrombosis from the age of 18 years and was managed with long-term warfarin therapy. Further investigation showed reduced coagulation factor V activity and APC resistance ratio but no other thrombophilic abnormalities. Heterozygous family members were asymptomatic. <a href="#50" class="mim-tip-reference" title="Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B. &lt;strong&gt;Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.&lt;/strong&gt; Brit. J. Haemat. 123: 496-501, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14617013/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14617013&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.2003.04624.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14617013">Mumford et al. (2003)</a> speculated that the I359T substitution resulted in abnormal N-linked glycosylation of asn357 within the factor V A2 domain and that this resulted in reduced susceptibility of factor Va to proteolysis by APC. <a href="#50" class="mim-tip-reference" title="Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B. &lt;strong&gt;Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.&lt;/strong&gt; Brit. J. Haemat. 123: 496-501, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14617013/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14617013&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.2003.04624.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14617013">Mumford et al. (2003)</a> suggested that the E119X mutation resulted in an mRNA that was recognized and degraded by the cell via a process termed nonsense-mediated decay. Thus, the authors concluded that hemizygosity for the I359T variant was the cause of severe early-onset thrombophilia in these sibs. The mutation was designated factor V Liverpool. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14617013" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#54" class="mim-tip-reference" title="Steen, M., Norstrom, E. A., Tholander, A.-L., Bolton-Maggs, P. H. B., Mumford, A., McVey, J. H., Tuddenham, E. G. D., Dahlback, B. &lt;strong&gt;Functional characterization of factor V-ile359-to-thr: a novel mutation associated with thrombosis.&lt;/strong&gt; Blood 103: 3381-3387, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14695241/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14695241&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1182/blood-2003-06-2092&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14695241">Steen et al. (2004)</a> found that the I359T mutation appeared to affect anticoagulation by 2 mechanisms, impeding the APC-mediated downregulation of the factor Va molecule and additionally being a poor APC cofactor for the downregulation of factor VIIIa. They concluded that these findings explained the association of the I359T mutation with thrombosis. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14695241" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>.0014&nbsp;THROMBOPHILIA DUE TO ACTIVATED PROTEIN C RESISTANCE</strong>
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F5, GLU119TER
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs118203912 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs118203912;toggle_HGVS_names=open" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'ensembl.org'})">Ensembl</a></li> <li><a href="https://www.ncbi.nlm.nih.gov/snp/?term=rs118203912" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'www.ncbi.nlm.nih.gov'})">NCBI</a></li> <li><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?org=Human&db=hg38&clinvar=pack&omimAvSnp=pack&position=rs118203912" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'dbSNP', 'domain': 'genome.ucsc.edu'})">UCSC</a></li> </ul> </div>
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<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=RCV000000679" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000000679" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000000679</a>
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<p>For discussion of the 529G-T transversion in the F5 gene, resulting in a glu119-to-ter (E119X) substitution, that was found in compound heterozygous state in 2 Caucasian brothers with thrombophilia due to APC resistance (<a href="/entry/188055">188055</a>) by <a href="#50" class="mim-tip-reference" title="Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B. &lt;strong&gt;Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.&lt;/strong&gt; Brit. J. Haemat. 123: 496-501, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14617013/&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed&#x27;, &#x27;domain&#x27;: &#x27;pubmed.ncbi.nlm.nih.gov&#x27;})&quot;&gt;14617013&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1365-2141.2003.04624.x&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;destination&#x27;: &#x27;Publisher&#x27;})&quot;&gt;Full Text&lt;/a&gt;]" pmid="14617013">Mumford et al. (2003)</a>, see <a href="#0013">612309.0013</a>. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14617013" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a href="#Guasch1997" class="mim-tip-reference" title="Guasch, J. F., Lensen, R. P. M., Bertina, R. M. &lt;strong&gt;Molecular characterization of a type I quantitative factor V deficiency in a thrombosis patient that is &#x27;pseudo homozygous&#x27; for activated protein C resistance.&lt;/strong&gt; Thromb. Haemost. 77: 252-257, 1997.">Guasch et al. (1997)</a>; <a href="#Zehnder1996" class="mim-tip-reference" title="Zehnder, J. L., Jain, M. &lt;strong&gt;Recurrent thrombosis due to compound heterozygosity for factor V Leiden and factor V deficiency.&lt;/strong&gt; Blood Coagul. Fibrinolysis 7: 361-362, 1996.">Zehnder and Jain (1996)</a>
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Ajzner, E., Balogh, I., Szabo, T., Marosi, A., Haramura, G., Muszbek, L.
<strong>Severe coagulation factor V deficiency caused by 2 novel frameshift mutations: 2952delT in exon 13 and 5493insG in exon 16 of factor 5 gene.</strong>
Blood 99: 702-705, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11781258/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11781258</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11781258" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1182/blood.v99.2.702" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="2" class="mim-anchor"></a>
<a id="Bauer1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Bauer, K. A.
<strong>Hypercoagulability--a new cofactor in the protein C anticoagulant pathway.</strong>
New Eng. J. Med. 330: 566-567, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8302325/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8302325</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8302325" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1056/NEJM199402243300810" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="3" class="mim-anchor"></a>
<a id="Beauchamp1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Beauchamp, N. J., Daly, M. E., Hampton, K. K., Cooper, P. C., Preston, E., Peake, I. R.
<strong>High prevalence of a mutation in the factor V gene within the U.K. population: relationship to activated protein C resistance and familial thrombosis.</strong>
Brit. J. Haemat. 88: 219-222, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7803250/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7803250</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7803250" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1111/j.1365-2141.1994.tb05005.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="4" class="mim-anchor"></a>
<a id="Bertina1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H.
<strong>Mutation in blood coagulation factor V associated with resistance to activated protein C.</strong>
Nature 369: 64-67, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8164741/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8164741</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8164741" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/369064a0" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="5" class="mim-anchor"></a>
<a id="Braun1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Braun, A., Muller, B., Rosche, A. A.
<strong>Population study of the G1691A mutation (R506Q, FV Leiden) in the human factor V gene that is associated with resistance to activated protein C.</strong>
Hum. Genet. 97: 263-264, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8566967/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8566967</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8566967" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/BF02265279" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="6" class="mim-anchor"></a>
<a id="Brenner1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Brenner, B., Lanir, N., Thaler, I.
<strong>HELLP syndrome associated with factor V R506Q mutation.</strong>
Brit. J. Haemat. 92: 999-1001, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8616100/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8616100</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8616100" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.1996.410947.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="7" class="mim-anchor"></a>
<a id="Casas2004" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Casas, J. P., Hingorani, A. D., Bautista, L. E., Sharma, P.
<strong>Meta-analysis of genetic studies in ischemic stroke: thirty-two genes involving approximately 18000 cases and 58000 controls.</strong>
Arch. Neurol. 61: 1652-1662, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/15534175/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">15534175</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15534175" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1001/archneur.61.11.1652" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="8" class="mim-anchor"></a>
<a id="Castaman1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Castaman, G., Lunghi, B., Missiaglia, E., Bernardi, F., Rodeghiero, F.
<strong>Phenotypic homozygous activated protein C resistance associated with compound heterozygosity for arg506-to-gln (factor V Leiden) and his1299-to-arg substitutions in factor V.</strong>
Brit. J. Haemat. 99: 257-261, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9375735/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9375735</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9375735" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.1997.3993213.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="9" class="mim-anchor"></a>
<a id="Castaman1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Castaman, G., Tosetto, A., Ruggeri, M., Rodeghiero, F.
<strong>Pseudohomozygosity for activated protein C resistance is a risk factor for venous thrombosis.</strong>
Brit. J. Haemat. 106: 232-236, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10444192/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10444192</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10444192" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.1999.01502.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="10" class="mim-anchor"></a>
<a id="Castoldi1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Castoldi, E., Kalafatis, M., Lunghi, B., Simioni, P., Ioannou, P. A., Petio, M., Girolami, A., Mann, K. G., Bernardi, F.
<strong>Molecular bases of pseudo-homozygous APC resistance: the compound heterozygosity for FV R506Q and a FV null mutation results in the exclusive presence of FV Leiden molecules in plasma.</strong>
Thromb. Haemost. 80: 403-406, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9759618/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9759618</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9759618" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="11" class="mim-anchor"></a>
<a id="Castoldi2000" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Castoldi, E., Simioni, P., Kalafatis, M., Lunghi, B., Tormene, D., Girelli, D., Girolami, A., Bernardi, F.
<strong>Combinations of 4 mutations (FV R506Q, FV H1299R, FV Y1702C, PT 20210G/A) affecting the prothrombinase complex in a thrombophilic family.</strong>
Blood 96: 1443-1448, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10942390/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10942390</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10942390" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="12" class="mim-anchor"></a>
<a id="Chan1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Chan, W. P., Lee, C. K., Kwong, Y. L., Lam, C. K., Liang, R.
<strong>A novel mutation of arg306 of factor V gene in Hong Kong Chinese.</strong>
Blood 91: 1135-1139, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9454741/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9454741</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9454741" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="13" class="mim-anchor"></a>
<a id="Cripe1992" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Cripe, L. D., Moore, K. D., Kane, W. H.
<strong>Structure of the gene for human coagulation factor V.</strong>
Biochemistry 31: 3777-3785, 1992.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1567832/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1567832</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1567832" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1021/bi00130a007" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="14" class="mim-anchor"></a>
<a id="Cui2000" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Cui, J., Eitzman, D. T., Westrick, R. J., Christie, P. D., Xu, Z. J., Yang, A. Y., Purkayastha, A. A., Yang, T. L., Metz, A. L., Gallagher, K. P., Tyson, J. A., Rosenberg, R. D., Ginsburg, D.
<strong>Spontaneous thrombosis in mice carrying the factor V Leiden mutation.</strong>
Blood 96: 4222-4226, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11110695/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11110695</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11110695" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="15" class="mim-anchor"></a>
<a id="Cui1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Cui, J., O'Shea, K. S., Purkayastha, A., Saunders, T. L., Ginsburg, D.
<strong>Fatal haemorrhage and incomplete block to embryogenesis in mice lacking coagulation factor V.</strong>
Nature 384: 66-68, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8900278/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8900278</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8900278" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/384066a0" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="16" class="mim-anchor"></a>
<a id="Dahlback1988" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Dahlback, B., Hansson, C., Islam, M. Q., Szpirer, J., Szpirer, C., Lundwall, A., Levan, G.
<strong>Assignment of gene for coagulation factor V to chromosome 1 in man and to chromosome 13 in rat.</strong>
Somat. Cell Molec. Genet. 14: 509-514, 1988.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3175767/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3175767</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3175767" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1007/BF01534716" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="17" class="mim-anchor"></a>
<a id="de Bruijn1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
de Bruijn, S. F. T. M., Stam, J., Koopman, M. M. W., Vandenbroucke, J. P.
<strong>Case-control study of risk of cerebral sinus thrombosis in oral contraceptive users and in carriers of hereditary prothrombotic conditions.</strong>
Brit. Med. J. 316: 589-592, 1998. Note: Erratum: J. Biol. Chem. 264: 21433 only, 1989.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9518910/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9518910</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9518910" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1136/bmj.316.7131.589" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="18" class="mim-anchor"></a>
<a id="De Stefano1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
De Stefano, V., Martinelli, I., Mannucci, P. M., Paciaroni, K., Chiusolo, P., Casorelli, I., Rossi, E., Leone, G.
<strong>The risk of recurrent deep venous thrombosis among heterozygous carriers of both factor V Leiden and the G20210A prothrombin mutation.</strong>
New Eng. J. Med. 341: 801-806, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10477778/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10477778</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10477778" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1056/NEJM199909093411104" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="19" class="mim-anchor"></a>
<a id="Duga2003" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Duga, S., Montefusco, M. C., Asselta, R., Malcovati, M., Peyvandi, F., Santagostino, E., Mannucci, P. M., Tenchini, M. L.
<strong>Arg2074-to-cys missense mutation in the C2 domain of factor V causing moderately severe factor V deficiency: molecular characterization by expression of the recombinant protein.</strong>
Blood 101: 173-177, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12393490/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12393490</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12393490" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1182/blood-2002-06-1928" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="20" class="mim-anchor"></a>
<a id="Faisel2004" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Faisel, F., Romppanen, E.-L., Hiltunen, M., Helisalmi, S., Laasanen, J., Punnonen, K., Salonen, J. T., Heinonen, S.
<strong>Susceptibility to pre-eclampsia in Finnish women is associated with R485K polymorphism in the factor V gene, not with Leiden mutation.</strong>
Europ. J. Hum. Genet. 12: 187-191, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/14673478/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">14673478</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14673478" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/sj.ejhg.5201124" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="21" class="mim-anchor"></a>
<a id="Gerhardt2000" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Gerhardt, A., Scharf, R. E., Beckmann, M. W., Struve, S., Bender, H. G., Pillny, M., Sandmann, W., Zotz, R. B.
<strong>Prothrombin and factor V mutations in women with a history of thrombosis during pregnancy and the puerperium.</strong>
New Eng. J. Med. 342: 374-380, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10666427/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10666427</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10666427" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1056/NEJM200002103420602" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="22" class="mim-anchor"></a>
<a id="Greengard1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Greengard, J. S., Sun, X., Xu, X., Fernandez, J. A., Griffin, J. H., Evatt, B.
<strong>Activated protein C resistance caused by arg506gln mutation in factor Va. (Letter)</strong>
Lancet 343: 1361-1362, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7910348/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7910348</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7910348" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/s0140-6736(94)92497-x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="23" class="mim-anchor"></a>
<a id="Gregg1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Gregg, J. P., Yamane, A. J., Grody, W. W.
<strong>Prevalence of the factor V-Leiden mutation in four distinct American ethnic populations.</strong>
Am. J. Med. Genet. 73: 334-336, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9415695/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9415695</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9415695" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/(sici)1096-8628(19971219)73:3&lt;334::aid-ajmg20&gt;3.0.co;2-j" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="24" class="mim-anchor"></a>
<a id="Guasch1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Guasch, J. F., Cannegieter, S., Reitsma, P. H., van't Veer-Korthof, E. T., Bertina, R. M.
<strong>Severe coagulation factor V deficiency caused by a 4 bp deletion in the factor V gene.</strong>
Brit. J. Haemat. 101: 32-39, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9576178/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9576178</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9576178" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.1998.00664.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="25" class="mim-anchor"></a>
<a id="Guasch1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Guasch, J. F., Lensen, R. P. M., Bertina, R. M.
<strong>Molecular characterization of a type I quantitative factor V deficiency in a thrombosis patient that is 'pseudo homozygous' for activated protein C resistance.</strong>
Thromb. Haemost. 77: 252-257, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9157576/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9157576</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9157576" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="26" class="mim-anchor"></a>
<a id="Gurakan1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Gurakan, F., Gurgey, A., Bakkaloglu, A., Kocak, N.
<strong>Homozygous factor V Leiden mutation in a child with Budd-Chiari syndrome.</strong>
J. Pediat. Gastroent. Nutr. 28: 516-517, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10328130/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10328130</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10328130" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1097/00005176-199905000-00016" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="27" class="mim-anchor"></a>
<a id="Gurgey1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Gurgey, A., Mesci, L.
<strong>The prevalence of factor V Leiden (1691G-A) mutation in Turkey.</strong>
Turk. J. Pediat. 39: 313-315, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9339109/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9339109</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9339109" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="28" class="mim-anchor"></a>
<a id="Hao2004" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Hao, K., Wang, X., Niu, T., Xu, X., Li, A., Chang, W., Wang, L., Li, G., Laird, N., Xu., X.
<strong>A candidate gene association study on preterm delivery: application of high-throughput genotyping technology and advanced statistical methods.</strong>
Hum. Molec. Genet. 13: 683-691, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/14976157/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">14976157</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14976157" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1093/hmg/ddh091" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="29" class="mim-anchor"></a>
<a id="Hayward1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Hayward, C. P. M., Cramer, E. M., Kane, W. H., Zheng, S., Bouchard, M., Masse, J.-M., Rivard, G. E.
<strong>Studies of a second family with the Quebec platelet disorder: evidence that the degradation of the alpha-granule membrane and its soluble contents are not secondary to a defect in targeting proteins to alpha-granules.</strong>
Blood 89: 1243-1253, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9028947/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9028947</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9028947" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="30" class="mim-anchor"></a>
<a id="Hayward1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Hayward, C. P. M., Rivard, G. E., Kane, W. H., Drouin, J., Zheng, S., Moore, J. C., Kelton, J. G.
<strong>An autosomal dominant, qualitative platelet disorder associated with multimerin deficiency, abnormalities in platelet factor V, thrombospondin, von Willebrand factor, and fibrinogen and an epinephrine aggregation defect.</strong>
Blood 87: 4967-4978, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8652809/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8652809</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8652809" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="31" class="mim-anchor"></a>
<a id="Janeway1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Janeway, C., Rivard, G. E., Tracy, P. B., Mann, K. G.
<strong>Factor V Quebec revisited.</strong>
Blood 87: 3571 only, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8611679/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8611679</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8611679" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="32" class="mim-anchor"></a>
<a id="Jenny1987" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Jenny, R. J., Pittman, D. D., Toole, J. J., Kriz, R. W., Aldape, R. A., Hewick, R. M., Kaufman, R. J., Mann, K. G.
<strong>Complete cDNA and derived amino acid sequence of human factor V.</strong>
Proc. Nat. Acad. Sci. 84: 4846-4850, 1987.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3110773/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3110773</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3110773" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1073/pnas.84.14.4846" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="33" class="mim-anchor"></a>
<a id="Juul2004" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Juul, K., Tybjaerg-Hansen, A., Schnohr, P., Nordestgaard, B. G.
<strong>Factor V Leiden and the risk for venous thromboembolism in the adult Danish population.</strong>
Ann. Intern. Med. 140: 330-337, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/14996674/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">14996674</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14996674" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.7326/0003-4819-140-5-200403020-00008" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="34" class="mim-anchor"></a>
<a id="Kane1986" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Kane, W. H., Davie, E. W.
<strong>Cloning of a cDNA coding for human factor V, a blood coagulation factor homologous to factor VIII and ceruloplasmin.</strong>
Proc. Nat. Acad. Sci. 83: 6800-6804, 1986.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3092220/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3092220</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3092220" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1073/pnas.83.18.6800" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="35" class="mim-anchor"></a>
<a id="Kane1987" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Kane, W. H., Ichinose, A., Hagen, F. S., Davie, E. W.
<strong>Cloning of cDNAs coding for the heavy chain region and connecting region of human factor V, a blood coagulation factor with four types of internal repeats.</strong>
Biochemistry 26: 6508-6514, 1987.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/2827731/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">2827731</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=2827731" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1021/bi00394a033" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="36" class="mim-anchor"></a>
<a id="Kemkes-Matthes2005" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Kemkes-Matthes, B., Matthes, K. J., Souri, M., Koseki-Kuno, S., Ichinose, A.
<strong>R225H amino acid substitution of protein Z identified in patients with factor V Leiden mutation.</strong>
Brit. J. Haemat. 128: 248-252, 2005.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/15638861/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">15638861</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15638861" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1111/j.1365-2141.2004.05297.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="37" class="mim-anchor"></a>
<a id="Koeleman1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Koeleman, B. P. C., Reitsma, P. H., Allaart, C. F., Bertina, R. M.
<strong>Activated protein C resistance as an additional risk factor for thrombosis in protein C-deficient families.</strong>
Blood 84: 1031-1035, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8049422/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8049422</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8049422" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="38" class="mim-anchor"></a>
<a id="Leebeek1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Leebeek, F. W. G., Lameris, J. S., van Buuren, H. R., Gomez, E., Madretsma, S., Sonneveld, P.
<strong>Budd-Chiari syndrome, portal vein and mesenteric vein thrombosis in a patient homozygous for factor V Leiden mutation treated by TIPS and thrombolysis.</strong>
Brit. J. Haemat. 102: 929-931, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9734642/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9734642</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9734642" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.1998.00860.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="39" class="mim-anchor"></a>
<a id="Liang1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Liang, R., Lee, C. K., Wat, M. S., Kwong, Y. L., Lam, C. K., Liu, H. W.
<strong>Clinical significance of arg306 mutations of factor V gene. (Letter)</strong>
Blood 92: 2599-2600, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9746807/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9746807</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9746807" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="40" class="mim-anchor"></a>
<a id="Lindqvist1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Lindqvist, P. G., Svensson, P. J., Dahlback, B., Marsal, K.
<strong>Factor V Q-506 mutation (activated protein C resistance) associated with reduced intrapartum blood loss: a possible evolutionary selection mechanism.</strong>
Thromb. Haemost. 79: 69-73, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9459326/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9459326</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9459326" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="41" class="mim-anchor"></a>
<a id="Lindqvist2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Lindqvist, P. G., Zoller, B., Dahlback, B.
<strong>Improved hemoglobin status and reduced menstrual blood loss among female carriers of factor V Leiden: an evolutionary advantage? (Letter)</strong>
Thromb. Haemost. 86: 1122-1123, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11686338/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11686338</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11686338" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="42" class="mim-anchor"></a>
<a id="Macedo-Ribeiro1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Macedo-Ribeiro, S., Bode, W., Huber, R., Quinn-Allen, M. A., Kim, S. W., Ortel, T. L., Bourenkov, G. P., Bartunik, H. D., Stubbs, M. T., Kane, W. H., Fuentes-Prior, P.
<strong>Crystal structures of the membrane-binding C2 domain of human coagulation factor V.</strong>
Nature 402: 434-439, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10586886/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10586886</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10586886" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/46594" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="43" class="mim-anchor"></a>
<a id="Mahmoud1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Mahmoud, A. E. A., Elias, E., Beauchamp, N., Wilde, J. T.
<strong>Prevalence of the factor V Leiden mutation in hepatic and portal vein thrombosis.</strong>
Gut 40: 798-800, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9245936/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9245936</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9245936" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1136/gut.40.6.798" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="44" class="mim-anchor"></a>
<a id="Majerus1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Majerus, P. W.
<strong>Bad blood by mutation.</strong>
Nature 369: 14-15, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8164730/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8164730</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8164730" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/369014a0" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="45" class="mim-anchor"></a>
<a id="Mann2003" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Mann, K. G., Kalafatis, M.
<strong>Factor V: a combination of Dr Jekyll and Mr Hyde.</strong>
Blood 101: 20-30, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12393635/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12393635</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12393635" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1182/blood-2002-01-0290" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="46" class="mim-anchor"></a>
<a id="Martinelli2000" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Martinelli, I., Taioli, E., Cetin, I., Marinoni, A., Gerosa, S., Villa, M. V., Bozzo, M., Mannucci, P. M.
<strong>Mutations in coagulation factors in women with unexplained late fetal loss.</strong>
New Eng. J. Med. 343: 1015-1018, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11018168/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11018168</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11018168" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1056/NEJM200010053431405" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="47" class="mim-anchor"></a>
<a id="McAlpine1989" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
McAlpine, P. J., Coopland, G., Guy, C., James, S., Komarnicki, L., MacDonald, M., Stranc, L., Lewis, M., Philipps, S., Coghlan, G., Kaita, H., Cox, D. W., Guinto, E. R., MacGillivray, R.
<strong>Mapping the genes for erythrocytic alpha-spectrin 1 (SPTA1) and coagulation factor V (F5). (Abstract)</strong>
Cytogenet. Cell Genet. 51: 1042, 1989.
</p>
</div>
</li>
<li>
<a id="48" class="mim-anchor"></a>
<a id="Meinardi1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Meinardi, J. R., Pelsma, P. M., Koning, H., van der Meer, J., Middeldorp, S., Buller, H. R., Hamulyak, K.
<strong>Double-homozygosity for factor V Leiden and the prothrombin gene G20210A variant in a young patient with idiopathic venous thrombosis. (Letter)</strong>
Blood 94: 1828-1829, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10507841/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10507841</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10507841" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="49" class="mim-anchor"></a>
<a id="Meyer1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Meyer, M., Kutscher, G., Vogel, G.
<strong>Simultaneous genotyping for factor V Leiden and prothrombin G20210A variant by a multiplex PCR-SSCP assay on whole blood. (Letter)</strong>
Thromb. Haemost. 81: 162-163, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10348711/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10348711</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10348711" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="50" class="mim-anchor"></a>
<a id="Mumford2003" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B.
<strong>Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.</strong>
Brit. J. Haemat. 123: 496-501, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/14617013/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">14617013</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14617013" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.2003.04624.x" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="51" class="mim-anchor"></a>
<a id="Riddell1987" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Riddell, D. C., Wang, H., Royle, N. J., Nigli, M., Guinto, E., Kochinsky, M. L., Irwin, D. M., Cool, D., MacGillivray, R. T. A., Hamerton, J. L.
<strong>Regional assignment for the human genes encoding FII, FV, FXIII, ceruloplasmin and pseudoceruloplasmin. (Abstract)</strong>
Cytogenet. Cell Genet. 46: 682, 1987.
</p>
</div>
</li>
<li>
<a id="52" class="mim-anchor"></a>
<a id="Ridker1995" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ridker, P. M., Hennekens, C. H., Lindpaintner, K., Stampfer, M. J., Eisenberg, P. R., Miletich, J. P.
<strong>Mutation in the gene coding for coagulation factor V and the risk of myocardial infarction, stroke, and venous thrombosis in apparently healthy men.</strong>
New Eng. J. Med. 332: 912-917, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7877648/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7877648</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7877648" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1056/NEJM199504063321403" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="53" class="mim-anchor"></a>
<a id="Ridker1995" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ridker, P. M., Miletich, J. P., Stampfer, M. J., Goldhaber, S. Z., Lindpaintner, K., Hennekens, C. H.
<strong>Factor V Leiden and risks of recurrent idiopathic venous thromboembolism.</strong>
Circulation 92: 2800-2802, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7586244/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7586244</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7586244" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1161/01.cir.92.10.2800" target="_blank">Full Text</a>]
</p>
</div>
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<li>
<a id="54" class="mim-anchor"></a>
<a id="Steen2004" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Steen, M., Norstrom, E. A., Tholander, A.-L., Bolton-Maggs, P. H. B., Mumford, A., McVey, J. H., Tuddenham, E. G. D., Dahlback, B.
<strong>Functional characterization of factor V-ile359-to-thr: a novel mutation associated with thrombosis.</strong>
Blood 103: 3381-3387, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/14695241/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">14695241</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14695241" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1182/blood-2003-06-2092" target="_blank">Full Text</a>]
</p>
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<a id="55" class="mim-anchor"></a>
<a id="Talmon1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Talmon, T., Scharf, J., Mayer, E., Lanir, N., Miller, B., Brenner, B.
<strong>Retinal arterial occlusion in a child with factor V Leiden and thermolabile methylene tetrahydrofolate reductase mutations.</strong>
Am. J. Ophthal. 124: 689-691, 1997.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9372726/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9372726</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9372726" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/s0002-9394(14)70910-9" target="_blank">Full Text</a>]
</p>
</div>
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<a id="56" class="mim-anchor"></a>
<a id="Tanis1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tanis, B. C., van der Meer, F. J., Bloem, R. M., Vlasveld, L. T.
<strong>Successful excision of a pseudotumour in a congenitally factor V deficient patient.</strong>
Brit. J. Haemat. 100: 380-382, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9488630/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9488630</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9488630" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.1998.00570.x" target="_blank">Full Text</a>]
</p>
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<a id="57" class="mim-anchor"></a>
<a id="Tracy1984" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tracy, P. B., Giles, A. R., Mann, K. G., Eide, L. L., Hoogendoorn, H., Rivard, G. E.
<strong>Factor V (Quebec): a bleeding diathesis associated with a qualitative platelet factor V deficiency.</strong>
J. Clin. Invest. 74: 1221-1228, 1984.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/6480825/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">6480825</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=6480825" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1172/JCI111531" target="_blank">Full Text</a>]
</p>
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<a id="58" class="mim-anchor"></a>
<a id="van Wijk2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
van Wijk, R., Montefusco, M. C., Duga, S., Asselta, R., van Solinge, W., Malcovati, M., Tenchini, M. L., Mannucci, P. M.
<strong>Coexistence of a novel homozygous nonsense mutation in exon 13 of the factor V gene with the homozygous Leiden mutation in two unrelated patients with severe factor V deficiency.</strong>
Brit. J. Haemat. 114: 871-874, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11564077/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11564077</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11564077" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1365-2141.2001.03016.x" target="_blank">Full Text</a>]
</p>
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<a id="59" class="mim-anchor"></a>
<a id="van Wijk2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
van Wijk, R., Nieuwenhuis, K., van den Berg, M., Huizinga, E. G., van der Meijden, B. B., Kraaijenhagen, R. J., van Solinge, W. W.
<strong>Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency.</strong>
Blood 98: 358-367, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11435304/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11435304</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11435304" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1182/blood.v98.2.358" target="_blank">Full Text</a>]
</p>
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<a id="60" class="mim-anchor"></a>
<a id="Voorberg1994" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Voorberg, J., Roelse, J., Koopman, R., Buller, H., Berends, F., ten Cate, J. W., Mertens, K., van Mourik, J. A.
<strong>Association of idiopathic venous thromboembolism with single point-mutation at arg506 of factor V.</strong>
Lancet 343: 1535-1536, 1994.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7911872/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7911872</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7911872" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/s0140-6736(94)92939-4" target="_blank">Full Text</a>]
</p>
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<a id="61" class="mim-anchor"></a>
<a id="Wang1988" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Wang, H., Riddell, D. C., Guinto, E. R., MacGillivray, R. T. A., Hamerton, J. L.
<strong>Localization of the gene encoding human factor V to chromosome 1q21-25.</strong>
Genomics 2: 324-328, 1988.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3220473/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3220473</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3220473" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/0888-7543(88)90021-3" target="_blank">Full Text</a>]
</p>
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<a id="62" class="mim-anchor"></a>
<a id="Westendorp1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Westendorp, R. G. J., Reitsma, P. H., Bertina, R. M.
<strong>Inherited prethrombotic disorders and infectious purpura.</strong>
Thromb. Haemost. 75: 899-901, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8822583/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8822583</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8822583" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
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<a id="63" class="mim-anchor"></a>
<a id="Williamson1998" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Williamson, D., Brown, K., Luddington, R., Baglin, C., Baglin, T.
<strong>Factor V Cambridge: a new mutation (arg306-to-thr) associated with resistance to activated protein C.</strong>
Blood 91: 1140-1144, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9454742/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9454742</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9454742" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
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<a id="64" class="mim-anchor"></a>
<a id="Zehnder1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Zehnder, J. L., Hiraki, D. D., Jones, C. D., Gross, N., Grumet, F. C.
<strong>Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford.</strong>
Thromb. Haemost. 82: 1097-1099, 1999. Note: Erratum: Thromb. Haemost. 82: XII only, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10494770/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10494770</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10494770" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
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<a id="65" class="mim-anchor"></a>
<a id="Zehnder1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Zehnder, J. L., Jain, M.
<strong>Recurrent thrombosis due to compound heterozygosity for factor V Leiden and factor V deficiency.</strong>
Blood Coagul. Fibrinolysis 7: 361-362, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8735145/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8735145</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8735145" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1097/00001721-199604000-00012" target="_blank">Full Text</a>]
</p>
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<a id="66" class="mim-anchor"></a>
<a id="Zivelin2006" class="mim-anchor"></a>
<div class="">
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Zivelin, A., Mor-Cohen, R., Kovalsky, V., Kornbrot, N., Conard, J., Peyvandi, F., Kyrle, P. A., Bertina, R., Peyvandi, F., Emmerich, J., Seligsohn, U.
<strong>Prothrombin 20210G-A is an ancestral prothrombotic mutation that occurred in whites approximately 24,000 years ago.</strong>
Blood 107: 4666-4668, 2006.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/16493002/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">16493002</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16493002" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1182/blood-2005-12-5158" target="_blank">Full Text</a>]
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<a id="contributors" class="mim-anchor"></a>
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<span class="mim-text-font">
Marla J. F. O'Neill - updated : 12/13/2011
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Cassandra L. Kniffin - updated : 6/27/2011<br>Cassandra L. Kniffin - updated : 9/24/2008
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Cassandra L. Kniffin : 9/22/2008
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carol : 02/12/2019
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carol : 02/11/2019<br>carol : 08/17/2017<br>alopez : 08/31/2015<br>carol : 9/13/2013<br>carol : 4/1/2013<br>carol : 3/1/2012<br>carol : 2/28/2012<br>alopez : 12/13/2011<br>terry : 7/19/2011<br>carol : 7/7/2011<br>ckniffin : 6/27/2011<br>carol : 4/8/2011<br>carol : 4/7/2011<br>carol : 1/5/2011<br>ckniffin : 8/25/2010<br>carol : 11/18/2009<br>carol : 10/8/2008<br>carol : 10/8/2008<br>carol : 10/8/2008<br>ckniffin : 10/8/2008<br>ckniffin : 9/24/2008
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<h3>
<span class="mim-font">
<strong>*</strong> 612309
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<h3>
<span class="mim-font">
COAGULATION FACTOR V; F5
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<span class="mim-font">
<em>Alternative titles; symbols</em>
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<h4>
<span class="mim-font">
PROTEIN C COFACTOR; PCCF<br />
ACTIVATED PROTEIN C COFACTOR<br />
APC COFACTOR<br />
LABILE FACTOR
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<p>
<span class="mim-font">
Other entities represented in this entry:
</span>
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<div>
<span class="h3 mim-font">
FACTOR V LEIDEN, INCLUDED
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<strong><em>HGNC Approved Gene Symbol: F5</em></strong>
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<span class="mim-text-font">
<strong>SNOMEDCT:</strong> 4320005; &nbsp;
</span>
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<div>
<br />
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<p>
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<strong>
<em>
Cytogenetic location: 1q24.2
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : 1:169,511,951-169,586,481 </span>
</em>
</strong>
<span class="small">(from NCBI)</span>
</span>
</p>
</div>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Gene-Phenotype Relationships</strong>
</span>
</h4>
<div>
<table class="table table-bordered table-condensed small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="6">
<span class="mim-font">
1q24.2
</span>
</td>
<td>
<span class="mim-font">
{Budd-Chiari syndrome}
</span>
</td>
<td>
<span class="mim-font">
600880
</span>
</td>
<td>
<span class="mim-font">
Autosomal recessive
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
{Pregnancy loss, recurrent, susceptibility to, 1}
</span>
</td>
<td>
<span class="mim-font">
614389
</span>
</td>
<td>
<span class="mim-font">
Autosomal dominant
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
{Stroke, ischemic, susceptibility to}
</span>
</td>
<td>
<span class="mim-font">
601367
</span>
</td>
<td>
<span class="mim-font">
Multifactorial
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
{Thrombophilia, susceptibility to, due to factor V Leiden}
</span>
</td>
<td>
<span class="mim-font">
188055
</span>
</td>
<td>
<span class="mim-font">
Autosomal dominant
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
Factor V deficiency
</span>
</td>
<td>
<span class="mim-font">
227400
</span>
</td>
<td>
<span class="mim-font">
Autosomal recessive
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
Thrombophilia 2 due to activated protein C resistance
</span>
</td>
<td>
<span class="mim-font">
188055
</span>
</td>
<td>
<span class="mim-font">
Autosomal dominant
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>TEXT</strong>
</span>
</h4>
<div>
<h4>
<span class="mim-font">
<strong>Description</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>The F5 gene encodes coagulation factor V, a large 330-kD plasma glycoprotein that circulates with little or no activity. Factor V is converted to the active form, factor Va, by thrombin (F2; 176930), which generates a heavy chain and a light chain held together by calcium ions. Activated factor V serves as an essential protein in the coagulation pathway and acts as a cofactor for the conversion of prothrombin to thrombin by factor Xa (F10; 613872). Factor Va is inactivated by activated protein C (PROC; 612283) (Kane and Davie, 1986; Cripe et al., 1992). </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Cloning and Expression</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Kane et al. (1987) isolated clones corresponding to a portion of the F5 gene from a human hepatocellular carcinoma (Hep G2) cDNA library. The deduced 938-residue partial protein was composed of a 651-residue light chain and a 287-residue connecting region. The amino acid sequence of the light chain region was about 40% identical to the corresponding region of factor VIII (F8; 300841). </p><p>Jenny et al. (1987) isolated a complete cDNA for factor V from a human fetal liver cDNA library and determined that the deduced amino acid sequence consists of 2,224 residues including a 28-residue leader peptide. The triplicated A domain and duplicated C domain showed approximately 40% identity with the corresponding domains in factor VIII. Factor V contains 37 potential N-linked glycosylation sites, 25 of which are in the B domain, and a total of 19 cysteine residues. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Gene Structure</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Cripe et al. (1992) determined that the F5 gene contains 25 exons. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Mapping</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Riddell et al. (1987) and Wang et al. (1988) mapped the F5 gene to chromosome 1 by Southern hybridization to somatic cell hybrid DNAs. By in situ hybridization, F5 was regionalized to 1q21-q25. Dahlback et al. (1988) confirmed the assignment of F5 to human chromosome 1 by hybridization studies of a panel of human-rodent somatic cell hybrids, and mapped the rat gene to chromosome 13. Combining linkage data with the physical assignment of the F5 locus, McAlpine et al. (1989) concluded that F5 lies in the 1q23 band. They found that F5 and AT3 (107300) are closely linked, with F5 located distal to AT3. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Gene Function</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Bauer (1994) reviewed the significance of the APC cofactor in the protein C anticoagulant pathway and illustrated it with a useful diagram. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Biochemical Features</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p><strong><em>Crystal Structure</em></strong></p><p>
Macedo-Ribeiro et al. (1999) determined 2 crystal structures of the C2 domain of human factor Va. The conserved beta-barrel framework provides a scaffold for 3 protruding loops, one of which adopts markedly different conformations in the 2 crystal forms. Macedo-Ribeiro et al. (1999) proposed a mechanism of calcium-independent, stereospecific binding of factors Va and VIIIa to phospholipid membranes on the basis of (1) immersion of hydrophobic residues at the apices of these loops in the apolar membrane core; (2) specific interactions with phosphatidylserine head groups in the groove enclosed by these loops; and (3) favorable electrostatic contacts of basic side chains with negatively charged membrane phosphate groups. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Molecular Genetics</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>In discussing the good and bad aspects of factor V functionality and durability, Mann and Kalafatis (2003) referred to factor V as a combination of Dr. Jekyll and Mr. Hyde. Mutations resulting in the absence or dysfunction of activated factor V lead to hemorrhagic disease, whereas mutations resulting in excessive longevity of the active species are associated with thrombosis. Factor V is thus required for a good outcome (Dr. Jekyll) but also is a potential source of disaster (Mr. Hyde). </p><p><strong><em>Factor V Deficiency</em></strong></p><p>
In a patient with mild bleeding due to factor V deficiency (227400), Guasch et al. (1998) identified a homozygous mutation in the F5 gene (612309.0004). </p><p>In a Korean woman with bleeding due to factor V deficiency, van Wijk et al. (2001) identified compound heterozygosity for 2 mutations in the F5 gene (612309.0006; 612309.0007). </p><p><strong><em>Thrombophilia Due to Activated Protein C Resistance</em></strong></p><p>
In affected members of a family with thrombophilia due to APC resistance (THPH2; 188055), Bertina et al. (1994) identified a heterozygous R506Q mutation (612309.0001) in the F5 gene. This variant was referred to as factor V Leiden, named after the town in the Netherlands where Bertina et al. (1994) discovered the defect. Bertina et al. (1994) identified the same R506Q mutation in 56 of 64 patients with APC-resistant thrombosis from a larger cohort of 301 consecutive patients with a first episode of deep vein thrombosis. The mutation was homozygous in 6 patients. </p><p>Voorberg et al. (1994) found the R506Q mutation in 10 of 27 consecutive patients with recurrent thromboembolism. </p><p>Majerus (1994) quoted estimates that 2 to 4% of the Dutch population and 7% of the Swedish population carried the mutant R506Q allele. The high frequency of a single factor V mutation in diverse groups of people raised the question of whether positive selection pressure was involved in maintaining it in the population. Majerus (1994) suggested that a slight thrombotic tendency may confer some advantage in fetal implantation. </p><p>In a patient with thrombophilia due to APC resistance, Williamson et al. (1998) identified a heterozygous R306T mutation in the F5 gene (612309.0003). The mutation was also present in a first-degree relative with APC resistance. </p><p>In 2 Caucasian brothers with thrombophilia due to APC resistance, Mumford et al. (2003) identified compound heterozygosity for 2 mutations in the F5 gene: a missense mutation (I359T; 612309.0013) and a nonsense mutation (E119X; 612309.0014). Both brothers developed spontaneous venous thromboses in the second decade of life. One presented at the age of 14 years with thrombosis of the right femoral vein and inferior vena cava; an older brother had recurrent episodes of femoral vein thrombosis from the age of 18 years and was managed with long-term warfarin therapy. Heterozygous family members were asymptomatic. </p><p><strong><em>Pseudohomozygosity for Factor V Leiden</em></strong></p><p>
Castaman et al. (1997) and Castoldi et al. (1998) described patients with thrombosis who were compound heterozygous for factor V Leiden and a factor V deficiency allele. The patients were referred to as having 'pseudohomozygosity' for factor V Leiden, since they presented with venous thromboembolic events. Although the resistance to APC is in the range of factor V Leiden homozygotes, genotyping demonstrated heterozygosity for the factor V Leiden mutation. Those with F5 null mutations showed only factor V Leiden molecules, and those with deficient mutations show decreased levels of F5 that were insufficient to protect against thrombosis. </p><p>Zehnder et al. (1999) identified a man with thrombophilia who was compound heterozygous for factor V Leiden and a null allele of the F5 gene (612309.0005). The patient had 50% of normal levels of F5, all of which was of the Leiden type; hence he was pseudohomozygous for factor V Leiden. </p><p>Among 7 families with 11 pseudohomozygotes and 45 relatives, Castaman et al. (1999) found that 16 relatives were heterozygous factor V Leiden carriers, 9 showed partial factor V deficiency, and 20 had no abnormalities. Deep vein thrombosis occurred in 4 of 11 (36.3%) pseudohomozygous patients, in 6 of 16 (37.4%) factor V Leiden carriers, and in 1 of 20 (5%) normal relatives. Castaman et al. (1999) concluded that pseudohomozygosity for APC resistance carries a significantly higher risk for venous thromboembolism in comparison to normal subjects, but probably not in comparison to heterozygous FV Leiden carriers. </p><p><strong><em>Other Disease Associations</em></strong></p><p>
Faisel et al. (2004) analyzed the allele and genotype frequencies of 2 F5 polymorphisms, M385T, R485K, and the R506Q Leiden mutation in 133 Finnish women with preeclampsia (189800) and 112 controls. There were statistically significant differences in R485K allele (p = 0.003) and genotype (p = 0.03) frequencies between patients and controls. The A allele of R485K was overrepresented among the patients (12%) compared to the controls (4%), with an odds ratio (OR) of 2.8 (95% CI, 1.2-6.2) for combined A genotypes. Faisel et al. (2004) concluded that genetic variations in the factor V gene other than the Leiden mutation may play a role in disease susceptibility. </p><p>Hao et al. (2004) conducted a large-scale case-control study exploring the associations of 426 single-nucleotide polymorphisms (SNPs) with preterm delivery in 300 mothers with preterm delivery and 458 mothers with term deliveries. Twenty-five candidate genes were included in the final haplotype analysis, and there was a significant association between a F5 gene haplotype and preterm delivery. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>History</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Hayward et al. (1996) described an autosomal dominant bleeding disorder in a Quebec family that was associated with reduced to normal platelet counts, defective epinephrine aggregation, and multiple glycoprotein abnormalities. This disorder had been previously designated 'factor V (Quebec)' by Tracy et al. (1984) because of abnormalities in platelet factor V. However, Hayward et al. (1996, 1997) and Janeway et al. (1996) determined that, although platelet factor V was indeed deficient in this disorder, several other platelet alpha-granular proteins were also deficient. The findings indicated that this was not a primary defect of factor V, but rather a distinct entity, now referred to as the Quebec platelet disorder (601709). </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Animal Model</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Cui et al. (1996) found that approximately half of homozygous factor V-null mouse embryos died at embryonic days 9 to 10, possibly as a result of an abnormality in the yolk-sac vasculature. The remaining homozygous deficient mice progressed normally to term, but died from massive hemorrhage within 2 hours of birth. Considered together with the milder phenotypes generally associated with deficiencies of other clotting factors, the findings demonstrated the primary role of the common coagulation pathway and the absolute requirement for functional factor V for prothrombinase activity. The results also provided direct evidence for the existence of other critical hemostatic functions for thrombin in addition to fibrin clot formation, and identified a previously unrecognized role for the coagulation system in early mammalian development. </p><p>Cui et al. (2000) found that mice carrying the R504Q mutation, homologous to human factor V Leiden (R506Q), were viable and fertile and exhibited normal survival. Compared with wildtype mice, adult homozygous mice demonstrated a marked increase in spontaneous tissue fibrin deposition. On a mixed genetic background, homozygous mice developed disseminated intravascular thrombosis in the perinatal period, resulting in significant mortality shortly after birth. Cui et al. (2000) suggested that these results may explain the high degree of conservation of the R504/R506 activated protein C cleavage site within factor V among mammalian species. </p>
</span>
<div>
<br />
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>ALLELIC VARIANTS</strong>
</span>
<strong>14 Selected Examples):</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0001 &nbsp; THROMBOPHILIA DUE TO FACTOR V LEIDEN</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
STROKE, ISCHEMIC, SUSCEPTIBILITY TO, INCLUDED<br />
BUDD-CHIARI SYNDROME, SUSCEPTIBILITY TO, INCLUDED<br />
PREGNANCY LOSS, RECURRENT, SUSCEPTIBILITY TO, 1, INCLUDED
</span>
</div>
<div>
<span class="mim-text-font">
F5, ARG506GLN
<br />
SNP: rs6025,
gnomAD: rs6025,
ClinVar: RCV000000675, RCV000000676, RCV000023935, RCV000205002, RCV000454249, RCV000616414, RCV001095681, RCV001806997, RCV002399305, RCV003227589, RCV003493407, RCV003764502, RCV005049305
</span>
</div>
<div>
<span class="mim-text-font">
<p>This mutation is commonly referred to as 'factor V Leiden.'</p><p><strong><em>Thrombophilia</em></strong></p><p>
In affected members of a family with thrombophilia due to APC resistance (188055), Bertina et al. (1994) identified a heterozygous 1691G-A transition in exon 10 of the F5 gene, resulting in an arg506-to-gln (R506Q) substitution. The R506Q substitution prevented inactivation of activated factor V by activated protein C (612283), resulting in a tendency to thrombosis. Of note, this family came to attention because of symptomatic protein C deficiency (176860). Bertina et al. (1994) identified the R506Q mutation in 56 of 64 patients with APC-resistant thrombosis from a larger cohort of 301 consecutive patients with a first episode of deep vein thrombosis. The mutation was homozygous in 6 patients. </p><p>Greengard et al. (1994) identified a heterozygous R506Q mutation in 8 patients with APC resistance; 2 were Ashkenazi Jews, 5 were Europeans of varying origins, and 1 was African American. Voorberg et al. (1994) found the R506Q mutation in 10 of 27 consecutive patients with recurrent thromboembolism. </p><p>Beauchamp et al. (1994) found the R506Q mutation in all affected members of 2 English families with inherited APC resistance associated with thrombosis. The molecular studies confirmed suspected homozygosity in 2 individuals. The mutation in heterozygous form was also found in approximately 3.5% of the normal population. </p><p>Among 14,916 apparently healthy men in the Physicians' Health Study, including 121 with deep venous thrombosis, Ridker et al. (1995) found that the R506Q mutation of the F5 gene was present in 25.8% of men over the age of 60 in whom primary venous thrombosis developed. There was no increased risk for secondary venous thrombosis. The presence of the mutation was not associated with an increased risk of myocardial infarction or stroke. In a follow-up study, of 77 study participants who had a first idiopathic venous thromboembolism, Ridker et al. (1995) found that factor V Leiden was associated with a 4- to 5-fold increased risk of recurrent thrombosis. The data raised the possibility that patients with idiopathic venous thromboembolism and factor V Leiden may require more prolonged anticoagulation to prevent recurrent disease compared to those without the mutation. </p><p>Among 7 families with 11 pseudohomozygotes and 45 relatives, Brenner et al. (1996) observed 2 patients with the HELLP (hemolysis, elevated liver enzymes, and low platelet count) syndrome who were found to be heterozygous for the R506Q mutation. The HELLP syndrome is a severe presentation of preeclampsia (see 189800). The finding of the R506Q mutation suggested that the pathogenesis of HELLP syndrome may be associated with a thrombotic process. </p><p>In 50 patients with meningococcal disease and thrombotic complications, Westendorp et al. (1996) found no increase in prevalence of the factor V Leiden mutation. </p><p>De Bruijn et al. (1998) studied risk factors in cerebral venous sinus thrombosis in women. They found a clear and significant excess of both hereditary prothrombotic conditions, including factor V Leiden, and oral contraceptive use in 40 prospectively ascertained patients compared to 2,248 randomly sampled controls. The authors concluded that the presence of prothrombotic conditions like the factor V Leiden mutation and the use of oral contraceptives increase the risk of this rare condition in a multiplicative fashion. </p><p>Gerhardt et al. (2000) studied 119 women with a history of venous thromboembolism during pregnancy and the puerperium and 233 age-matched normal women. Among the women with a history of venous thromboembolism, a prevalence of factor V Leiden was 43.7%, as compared with 7.7% among the normal women (relative risk of venous thromboembolism, 9.3). The prevalence of the 20210G-A prothrombin mutation (176930.0009) was 16.9% in the thromboembolism group as compared with 1.3% in the control group. The frequency of both factor V Leiden and the 20210G-A prothrombin mutation was 9.3% in the thromboembolism group as compared with 0 in the control group (estimated OR, 107). Assuming an overall risk of 1 in 1,500 pregnancies, the risk of thrombosis among carriers of factor V Leiden was 0.2%, among carriers of the 20210G-A prothrombin mutation, 0.5%, and among carriers of both defects, 4.6%, as calculated in a multivariate analysis. Thus, the risk among women with both mutations was disproportionately higher than that among women with only 1 mutation. </p><p>In a population-based cohort study of 9,253 Danish adults, Juul et al. (2004) found that heterozygotes and homozygotes for factor V Leiden had 2.7 and 18 times higher risk for venous thromboembolism, respectively, than noncarriers. Absolute 10-year risks for thromboembolism among heterozygote and homozygote nonsmokers younger than age 40 years who were not overweight were 0.7% and 3%, respectively. The 10-year risks in heterozygotes and homozygotes older than age 60 years who smoked and were overweight were 10% and 51%, respectively. </p><p>Kemkes-Matthes et al. (2005) found that presence of a heterozygous or homozygous arg225-to-his (R225H) substitution in exon 8 of the protein Z gene (PROZ; 176895) was associated with a higher frequency of thromboembolic complications in patients carrying the factor V Leiden mutation, although plasma levels of protein Z were not different between those with or without the R225H substitution. In a study of 134 carriers of factor V Leiden, the R225H mutation was found in 11 (14.4%) of 76 patients with thromboembolic events and in only 3 (5.1%) of 58 patients who did not have thromboembolic events. </p><p><strong><em>Stroke</em></strong></p><p>
In a comprehensive metaanalysis of 26 case-control studies including 4,588 white adult patients, Casas et al. (2004) found a statistically significant association between ischemic stroke (601367) and the R506Q substitution (OR, 1.33). </p><p><strong><em>Budd-Chiari Syndrome</em></strong></p><p>
Mahmoud et al. (1997) reported the incidence of the factor V Leiden mutation in Budd-Chiari syndrome (600880) and portal vein thrombosis. The R506Q mutation was seen in 7 (23%) of 30 patients with Budd-Chiari syndrome (6 heterozygotes and 1 homozygote), 3 of whom had coexistent myeloproliferative disease. Only 1 (3%) of 32 patients with portal vein thrombosis was found to have the R506Q mutation. The mutation was found in 3 (6%) of the 54 controls, who had liver disease but no history of thrombophilia. Mahmoud et al. (1997) concluded that the R506Q mutation seems to be an important factor in the pathogenesis of Budd-Chiari syndrome but not of portal vein thrombosis. </p><p>Leebeek et al. (1998) described a 27-year-old woman, homozygous for factor V Leiden, who developed Budd-Chiari syndrome caused by hepatic vein thrombosis in association with portal and mesenteric vein thrombosis. Gurakan et al. (1999) described a child with Budd-Chiari syndrome who was homozygous for the factor V Leiden mutation. The authors noted that Budd-Chiari syndrome is rare in children. </p><p><strong><em>Recurrent Pregnancy Loss</em></strong></p><p>
In a study of 67 women with a first episode of unexplained late fetal loss (fetal death after 20 weeks or more of gestation; 614389) and 232 women who had had 1 or more normal pregnancies with no late fetal loss, Martinelli et al. (2000) found that both factor V Leiden and a 20210G-A mutation in prothrombin (176930.0009) were associated with an approximate tripling of the risk of late fetal loss. </p><p><strong><em>Evolution</em></strong></p><p>
Zivelin et al. (2006) estimated the age of the factor V Leiden mutation to be 21,340 years. Like the prothrombin 20210G-A mutation (176930.0009), the mutation occurred in whites toward the end of the last glaciation and their wide distribution in whites suggested selective evolutionary advantages. A selective disadvantage (i.e., thrombosis) is unlikely because until recent centuries humans did not live long enough to manifest a meaningful incidence of thrombosis. On the other hand, augmented hemostasis conceivably conferred a selective advantage by reducing mortality from postpartum hemorrhage, hemorrhagia associated with severe iron deficiency anemia, and posttraumatic bleeding. For example, Lindqvist et al. (1998) found that the amount of blood lost during labor was significantly smaller in heterozygotes with factor V Leiden than in women not carrying the mutation, and Lindqvist et al. (2001) found that profuse menstrual bleeding was significantly less common in factor V heterozygotes. </p><p>Among 122 pregnant women with preeclampsia or intrauterine growth retardation, Lindqvist et al. (1998) found a significantly reduced risk of intrapartum bleeding complications in the APC-resistant subgroup compared to non-APC-resistant subgroup, as indicated by reduced intrapartum blood loss and pre- and postpartum hemoglobin measurements. Lindqvist et al. (1998) speculated that the remarkably high prevalence of a potentially harmful factor V gene mutation in the general population may be the result of an evolutionary selection mechanism conferring such survival advantages as reduction in the risk of intrapartum bleeding. </p><p><strong><em>Pseudohomozygosity for Factor V Leiden</em></strong></p><p>
Zehnder et al. (1999) identified a man with thrombophilia who was found to be compound heterozygous for factor V Leiden and a null allele of the F5 gene (612309.0005). The patient had 50% of normal levels of F5, all of which was of the Leiden type; hence he was 'pseudohomozygous' for factor V Leiden. </p><p><strong><em>Digenic Inheritance</em></strong></p><p>
Koeleman et al. (1994) found that heterozygous carriers of both the R506Q and a mutation in the protein C gene were at higher risk of thrombosis than were patients with either defect alone. </p><p>Talmon et al. (1997) described retinal arterial occlusion in a child heterozygous for the factor V R506Q mutation and homozygous for thermolabile methylene tetrahydrofolate reductase (236250.0003). Thus, the coexistence of 2 mild hereditary thrombophilic states can result in severe thrombotic manifestations in young people. Although factor V Leiden had been associated clearly with venous thrombosis, most studies had failed to demonstrate an association between isolated factor V Leiden and arterial thrombosis. </p><p>De Stefano et al. (1999) examined the relative risk of recurrent deep venous thrombosis using a proportional-hazards model. The authors found that whereas patients who were heterozygous for factor V Leiden alone had a risk of recurrent deep venous thrombosis that was similar to that among patients who had neither mutation, patients who were heterozygous for both factor V Leiden and prothrombin 20210G-A (176930.0009) had a 2.6-fold higher risk of recurrent thrombosis than did carriers of factor V Leiden alone. Meinardi et al. (1999) described double homozygosity for factor V Leiden and prothrombin 20210G-A in a 34-year-old man with idiopathic venous thrombosis. </p><p>Meyer et al. (1999) described a method for simultaneously genotyping for factor V Leiden and the prothrombin 20210G-A variant by a multiplex PCR-SSCP assay on whole blood. </p><p><strong><em>Population Studies</em></strong></p><p>
Majerus (1994) quoted estimates that 2 to 4% of the Dutch population and 7% of the Swedish population carried the factor V Leiden allele (R506Q; 612309.0001). The high frequency of a single factor V mutation in diverse groups of people raised the question of whether positive selection pressure was involved in maintaining it in the population. Majerus (1994) suggested that a slight thrombotic tendency may confer some advantage in fetal implantation. </p><p>In a population study in southern Germany, Braun et al. (1996) found that 7.8% of 180 unrelated individuals were heterozygous for the factor V Leiden mutation. </p><p>In a multiethnic survey of 602 Americans, Gregg et al. (1997) found that Hispanic Americans had the highest frequency of the Leiden mutant allele, 1.65%, while African Americans had a somewhat lower frequency, 0.87%. No instances of the Leiden mutation were found in 191 Asian Americans or 54 Native Americans tested. These results indicated that the Leiden mutation segregates in populations with significant Caucasian admixture and is rare in genetically distant non-European groups. </p><p>Gurgey and Mesci (1997) determined that the F5 Leiden allele has a frequency of 8% in the Turkish population. </p><p>Chan et al. (1998) found that the R506Q mutation was rare among Hong Kong Chinese, as it was not detected among 83 unrelated Hong Kong Chinese, 43 of whom had deep venous thromboses. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0002 &nbsp; FACTOR V HONG KONG</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, ARG306GLY
<br />
SNP: rs118203905,
gnomAD: rs118203905,
ClinVar: RCV000000677, RCV001753395, RCV002269817, RCV003761734
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 2 patients with deep vein thrombosis and 1 nonthrombotic individual, Chan et al. (1998) identified a 1090A-G sequence change in exon 7 of the F5 gene, resulting in an arg306-to-gly (R306G) substitution. Fresh blood samples available from 1 of them showed no resistance to activated protein C. </p><p>Liang et al. (1998) found that the mutant R306G protein retained susceptibility to cleavage by activated protein C. In contrast, the R306T substitution (612309.0003) conferred resistance to protein C cleavage. In Hong Kong, R306G was found in 4 of 89 (4.5%) healthy blood donors and 8 of 260 (3.1%) diabetic subjects. There was no statistically significant difference between these 2 figures and the incidence rate of 2 in 43 (4.7%) previously reported by Chan et al. (1998) in thrombotic patients. The data suggested that the R306G variant does not predispose to clinical thrombosis. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0003 &nbsp; THROMBOPHILIA DUE TO ACTIVATED PROTEIN C RESISTANCE</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, ARG306THR
<br />
SNP: rs118203906,
gnomAD: rs118203906,
ClinVar: RCV000000678
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a patient with thrombophilia due to APC resistance (188055), Williamson et al. (1998) identified a G-to-C transversion in the F5 gene, resulting in an arg306-to-thr (R306T) substitution. The mutation was also present in a first-degree relative with APC resistance. This was the first description of a mutation affecting the arg306 APC cleavage site, and the only mutation other than factor V Leiden (612309.0001) found in association with APC resistance. Discovered at Addenbrooke's Hospital in Cambridge, England, the variant was referred to as factor V Cambridge. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0004 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, 4-BP DEL, EX13
<br />
SNP: rs2101818393,
ClinVar: RCV000000680
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a young girl with very mild bleeding symptoms and undetectable levels of plasma factor V antigen and activity (227400), Guasch et al. (1998) identified a homozygous 4-bp deletion in exon 13 of the F5 gene, resulting in a frameshift and premature protein termination. The truncated factor V molecule was predicted to lack part of the B domain and the complete light chain. However, no factor V heavy chain could be detected in the plasma of the patient or in the patient's platelets. This was the first reported mutation in the factor V gene that predicted a type I quantitative factor V deficiency. The patient presented at the age of 3 years with prolonged bleeding from a cut in her upper lip after trauma. The parents were consanguineous, and each had a plasma level of factor V activity of about 50% of normal. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0005 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, 4-BP INS, 2805ATTG
<br />
SNP: rs773569662,
gnomAD: rs773569662,
ClinVar: RCV000000681
</span>
</div>
<div>
<span class="mim-text-font">
<p>Zehnder et al. (1999) identified a man with thrombophilia (188055) who was found to be compound heterozygous for factor V Leiden (612309.0001) and a null allele of the F5 gene resulting from a 4-bp insertion (2805insATTG) in exon 13. The insertion resulted in a frameshift and premature termination. The patient had 50% of normal levels of F5, all of which was of the Leiden type; hence he was 'pseudohomozygous' for factor V Leiden. Each of his 2 children inherited a different paternal factor V allele: the daughter was heterozygous for factor V Leiden, with 100% factor V activity, and the son was heterozygous for factor V deficiency, with 50% factor V activity and no factor V Leiden allele. The 4-bp insertion, designated factor V Stanford, was thus a factor V deficiency (227400) allele resulting in loss of protein function. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0006 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, 8-BP DEL, NT1131
<br />
SNP: rs2101829195,
ClinVar: RCV000000682
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a 19-year-old Korean woman with severe factor V deficiency (227400), van Wijk et al. (2001) identified compound heterozygosity for 2 mutations in the F5 gene: an 8-bp deletion in exon 7, at nucleotides 1131-1139, resulting in a frameshift and a premature stop codon (factor V Seoul-1), and a 5279A-G transition in exon 15 resulting in a tyr1702-to-cys (Y1702C; 612309.0007) substitution (factor V Seoul-2). The patient developed bleeding of the soft tissue of the mouth at the age of 19 months, experienced a large subdural hematoma at the age of 4 years, and suffered soft tissue bleeds of the mouth, epistaxis, and hematomas for which she received fresh frozen plasma once every 3 months. In recent years her bleeding pattern changed to spontaneous muscle bleedings. The patient was an orphan who had been adopted by a Dutch family at the age of 3 months and had no known relatives; thus it was not possible to determine directly that the Y1702C mutation was in trans to the 8-bp deletion. However, the same Y1702C mutation, associated with factor V deficiency, had been reported by Castoldi et al. (2000). </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0007 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, TYR1702CYS
<br />
SNP: rs118203907,
gnomAD: rs118203907,
ClinVar: RCV000000683, RCV003595850, RCV004766973
</span>
</div>
<div>
<span class="mim-text-font">
<p>For discussion of the 5279A-G transition in exon 15 of the F5 gene, resulting in a tyr1702-to-cys (Y1702C) substitution (factor V Seoul-2), that was found in compound heterozygous state in a 19-year-old Korean woman with severe factor V deficiency (227400) by van Wijk et al. (2001), see 612309.0006. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0008 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, GLN773TER
<br />
SNP: rs118203908,
gnomAD: rs118203908,
ClinVar: RCV000000684
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a 15-year-old girl from Morocco, the daughter of first-cousin parents, van Wijk et al. (2001) found that severe factor V deficiency with F5 activity less than 1% (227400) was caused by a homozygous 2491C-T transition in exon 13 of the F5 gene, resulting in a gln773-to-ter (Q773X) substitution. The patient was identified in the course of family screening. A 23-year-old brother, previously described by Tanis et al. (1998), also had severe factor V deficiency and prolonged bleeding after injuries. This mutation was designated factor V Casablanca. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0009 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, ARG1133TER
<br />
SNP: rs118203909,
gnomAD: rs118203909,
ClinVar: RCV000000685
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 2 seemingly unrelated southern Italian probands with undetectable plasma levels of factor V antigen and activity (227400), van Wijk et al. (2001) found homozygosity for the factor V Leiden mutation (612309.0001) in cis with a homozygous 3571C-T transition in exon 13 of the F5 gene, resulting in an arg1133-to-ter (R1133X) substitution and a truncated factor V molecule. Haplotype analysis suggested that an ancestral F5 Leiden allele, carrying the R1133X nonsense mutation in cis, diverged into the relatively rare haplotype identified in 1 of the probands by an intragenic crossing-over. Although the deficiency of the coagulation factor was profound, it was associated with only mild bleeding diathesis in 1 proband and the other proband was asymptomatic. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0010 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, 1-BP DEL, 2952T
<br />
SNP: rs765982916,
gnomAD: rs765982916,
ClinVar: RCV000851763, RCV003596549
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a male infant with severe bleeding tendency and undetectable factor V activity (227400), Ajzner et al. (2002) found compound heterozygosity for 2 mutations in the F5 gene: a 1-bp deletion in exon 13 (2952delT) and a 1-bp insertion in exon 16 (5493insG; 612309.0011). Both mutations introduced a frameshift and a premature stop at codons 930 and 1776, respectively. The proband's father and mother were heterozygous for the 2 mutations, respectively. Both mutations resulted in the synthesis of truncated proteins lacking complete light chain or its C-terminal part. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0011 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, 1-BP INS, 5493G
<br />
SNP: rs2101810760,
ClinVar: RCV000000687
</span>
</div>
<div>
<span class="mim-text-font">
<p>For discussion of the 1-bp insertion (5493insG) in exon 16 of the F5 gene, resulting in a frameshift and a premature stop at codon 1776, that was found in compound heterozygous state in a male infant with severe bleeding tendency and undetectable factor V activity (227400) by Ajzner et al. (2002), see 612309.0010. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0012 &nbsp; FACTOR V DEFICIENCY</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, ARG2074CYS
<br />
SNP: rs118203910,
gnomAD: rs118203910,
ClinVar: RCV000000688
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a 22-year-old Italian woman in whom factor V deficiency (227400) was first diagnosed at the age of 10 years after abnormal coagulation screening tests were found preceding an operation for strabismus, Duga et al. (2003) identified a homozygous 6394C-T transition at in exon 23 of the F5 gene, resulting in an arg2074-to-cys (R2074C) change in the C2 domain of the protein. Functional studies showed that this substitution impaired both factor V secretion and its activity. The patient's menstruation was normal and her only bleeding symptom was easy bruising after minor trauma. Her parents, apparently nonconsanguineous, were asymptomatic and had factor V functional and antigen levels typical of heterozygotes. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0013 &nbsp; THROMBOPHILIA DUE TO ACTIVATED PROTEIN C RESISTANCE</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, ILE359THR
<br />
SNP: rs118203911,
ClinVar: RCV000000689
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 2 Caucasian brothers with thrombophilia due to APC resistance (188055), Mumford et al. (2003) identified compound heterozygosity for 2 mutations in the F5 gene: a 1250T-C transition resulting in an ile359-to-thr (I359T) substitution, and a 529G-T transversion resulting in a glu119-to-ter mutation (E119X; 612309.0014). Both brothers developed spontaneous venous thromboses in the second decade of life. One presented at the age of 14 years with thrombosis of the right femoral vein and inferior vena cava; an older brother suffered recurrent episodes of femoral vein thrombosis from the age of 18 years and was managed with long-term warfarin therapy. Further investigation showed reduced coagulation factor V activity and APC resistance ratio but no other thrombophilic abnormalities. Heterozygous family members were asymptomatic. Mumford et al. (2003) speculated that the I359T substitution resulted in abnormal N-linked glycosylation of asn357 within the factor V A2 domain and that this resulted in reduced susceptibility of factor Va to proteolysis by APC. Mumford et al. (2003) suggested that the E119X mutation resulted in an mRNA that was recognized and degraded by the cell via a process termed nonsense-mediated decay. Thus, the authors concluded that hemizygosity for the I359T variant was the cause of severe early-onset thrombophilia in these sibs. The mutation was designated factor V Liverpool. </p><p>Steen et al. (2004) found that the I359T mutation appeared to affect anticoagulation by 2 mechanisms, impeding the APC-mediated downregulation of the factor Va molecule and additionally being a poor APC cofactor for the downregulation of factor VIIIa. They concluded that these findings explained the association of the I359T mutation with thrombosis. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0014 &nbsp; THROMBOPHILIA DUE TO ACTIVATED PROTEIN C RESISTANCE</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
F5, GLU119TER
<br />
SNP: rs118203912,
ClinVar: RCV000000679
</span>
</div>
<div>
<span class="mim-text-font">
<p>For discussion of the 529G-T transversion in the F5 gene, resulting in a glu119-to-ter (E119X) substitution, that was found in compound heterozygous state in 2 Caucasian brothers with thrombophilia due to APC resistance (188055) by Mumford et al. (2003), see 612309.0013. </p>
</span>
</div>
<div>
<br />
</div>
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>See Also:</strong>
</span>
</h4>
<span class="mim-text-font">
Guasch et al. (1997); Zehnder and Jain (1996)
</span>
<div>
<br />
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Ajzner, E., Balogh, I., Szabo, T., Marosi, A., Haramura, G., Muszbek, L.
<strong>Severe coagulation factor V deficiency caused by 2 novel frameshift mutations: 2952delT in exon 13 and 5493insG in exon 16 of factor 5 gene.</strong>
Blood 99: 702-705, 2002.
[PubMed: 11781258]
[Full Text: https://doi.org/10.1182/blood.v99.2.702]
</p>
</li>
<li>
<p class="mim-text-font">
Bauer, K. A.
<strong>Hypercoagulability--a new cofactor in the protein C anticoagulant pathway.</strong>
New Eng. J. Med. 330: 566-567, 1994.
[PubMed: 8302325]
[Full Text: https://doi.org/10.1056/NEJM199402243300810]
</p>
</li>
<li>
<p class="mim-text-font">
Beauchamp, N. J., Daly, M. E., Hampton, K. K., Cooper, P. C., Preston, E., Peake, I. R.
<strong>High prevalence of a mutation in the factor V gene within the U.K. population: relationship to activated protein C resistance and familial thrombosis.</strong>
Brit. J. Haemat. 88: 219-222, 1994.
[PubMed: 7803250]
[Full Text: https://doi.org/10.1111/j.1365-2141.1994.tb05005.x]
</p>
</li>
<li>
<p class="mim-text-font">
Bertina, R. M., Koeleman, B. P. C., Koster, T., Rosendaal, F. R., Dirven, R. J., de Ronde, H., van der Velden, P. A., Reitsma, P. H.
<strong>Mutation in blood coagulation factor V associated with resistance to activated protein C.</strong>
Nature 369: 64-67, 1994.
[PubMed: 8164741]
[Full Text: https://doi.org/10.1038/369064a0]
</p>
</li>
<li>
<p class="mim-text-font">
Braun, A., Muller, B., Rosche, A. A.
<strong>Population study of the G1691A mutation (R506Q, FV Leiden) in the human factor V gene that is associated with resistance to activated protein C.</strong>
Hum. Genet. 97: 263-264, 1996.
[PubMed: 8566967]
[Full Text: https://doi.org/10.1007/BF02265279]
</p>
</li>
<li>
<p class="mim-text-font">
Brenner, B., Lanir, N., Thaler, I.
<strong>HELLP syndrome associated with factor V R506Q mutation.</strong>
Brit. J. Haemat. 92: 999-1001, 1996.
[PubMed: 8616100]
[Full Text: https://doi.org/10.1046/j.1365-2141.1996.410947.x]
</p>
</li>
<li>
<p class="mim-text-font">
Casas, J. P., Hingorani, A. D., Bautista, L. E., Sharma, P.
<strong>Meta-analysis of genetic studies in ischemic stroke: thirty-two genes involving approximately 18000 cases and 58000 controls.</strong>
Arch. Neurol. 61: 1652-1662, 2004.
[PubMed: 15534175]
[Full Text: https://doi.org/10.1001/archneur.61.11.1652]
</p>
</li>
<li>
<p class="mim-text-font">
Castaman, G., Lunghi, B., Missiaglia, E., Bernardi, F., Rodeghiero, F.
<strong>Phenotypic homozygous activated protein C resistance associated with compound heterozygosity for arg506-to-gln (factor V Leiden) and his1299-to-arg substitutions in factor V.</strong>
Brit. J. Haemat. 99: 257-261, 1997.
[PubMed: 9375735]
[Full Text: https://doi.org/10.1046/j.1365-2141.1997.3993213.x]
</p>
</li>
<li>
<p class="mim-text-font">
Castaman, G., Tosetto, A., Ruggeri, M., Rodeghiero, F.
<strong>Pseudohomozygosity for activated protein C resistance is a risk factor for venous thrombosis.</strong>
Brit. J. Haemat. 106: 232-236, 1999.
[PubMed: 10444192]
[Full Text: https://doi.org/10.1046/j.1365-2141.1999.01502.x]
</p>
</li>
<li>
<p class="mim-text-font">
Castoldi, E., Kalafatis, M., Lunghi, B., Simioni, P., Ioannou, P. A., Petio, M., Girolami, A., Mann, K. G., Bernardi, F.
<strong>Molecular bases of pseudo-homozygous APC resistance: the compound heterozygosity for FV R506Q and a FV null mutation results in the exclusive presence of FV Leiden molecules in plasma.</strong>
Thromb. Haemost. 80: 403-406, 1998.
[PubMed: 9759618]
</p>
</li>
<li>
<p class="mim-text-font">
Castoldi, E., Simioni, P., Kalafatis, M., Lunghi, B., Tormene, D., Girelli, D., Girolami, A., Bernardi, F.
<strong>Combinations of 4 mutations (FV R506Q, FV H1299R, FV Y1702C, PT 20210G/A) affecting the prothrombinase complex in a thrombophilic family.</strong>
Blood 96: 1443-1448, 2000.
[PubMed: 10942390]
</p>
</li>
<li>
<p class="mim-text-font">
Chan, W. P., Lee, C. K., Kwong, Y. L., Lam, C. K., Liang, R.
<strong>A novel mutation of arg306 of factor V gene in Hong Kong Chinese.</strong>
Blood 91: 1135-1139, 1998.
[PubMed: 9454741]
</p>
</li>
<li>
<p class="mim-text-font">
Cripe, L. D., Moore, K. D., Kane, W. H.
<strong>Structure of the gene for human coagulation factor V.</strong>
Biochemistry 31: 3777-3785, 1992.
[PubMed: 1567832]
[Full Text: https://doi.org/10.1021/bi00130a007]
</p>
</li>
<li>
<p class="mim-text-font">
Cui, J., Eitzman, D. T., Westrick, R. J., Christie, P. D., Xu, Z. J., Yang, A. Y., Purkayastha, A. A., Yang, T. L., Metz, A. L., Gallagher, K. P., Tyson, J. A., Rosenberg, R. D., Ginsburg, D.
<strong>Spontaneous thrombosis in mice carrying the factor V Leiden mutation.</strong>
Blood 96: 4222-4226, 2000.
[PubMed: 11110695]
</p>
</li>
<li>
<p class="mim-text-font">
Cui, J., O'Shea, K. S., Purkayastha, A., Saunders, T. L., Ginsburg, D.
<strong>Fatal haemorrhage and incomplete block to embryogenesis in mice lacking coagulation factor V.</strong>
Nature 384: 66-68, 1996.
[PubMed: 8900278]
[Full Text: https://doi.org/10.1038/384066a0]
</p>
</li>
<li>
<p class="mim-text-font">
Dahlback, B., Hansson, C., Islam, M. Q., Szpirer, J., Szpirer, C., Lundwall, A., Levan, G.
<strong>Assignment of gene for coagulation factor V to chromosome 1 in man and to chromosome 13 in rat.</strong>
Somat. Cell Molec. Genet. 14: 509-514, 1988.
[PubMed: 3175767]
[Full Text: https://doi.org/10.1007/BF01534716]
</p>
</li>
<li>
<p class="mim-text-font">
de Bruijn, S. F. T. M., Stam, J., Koopman, M. M. W., Vandenbroucke, J. P.
<strong>Case-control study of risk of cerebral sinus thrombosis in oral contraceptive users and in carriers of hereditary prothrombotic conditions.</strong>
Brit. Med. J. 316: 589-592, 1998. Note: Erratum: J. Biol. Chem. 264: 21433 only, 1989.
[PubMed: 9518910]
[Full Text: https://doi.org/10.1136/bmj.316.7131.589]
</p>
</li>
<li>
<p class="mim-text-font">
De Stefano, V., Martinelli, I., Mannucci, P. M., Paciaroni, K., Chiusolo, P., Casorelli, I., Rossi, E., Leone, G.
<strong>The risk of recurrent deep venous thrombosis among heterozygous carriers of both factor V Leiden and the G20210A prothrombin mutation.</strong>
New Eng. J. Med. 341: 801-806, 1999.
[PubMed: 10477778]
[Full Text: https://doi.org/10.1056/NEJM199909093411104]
</p>
</li>
<li>
<p class="mim-text-font">
Duga, S., Montefusco, M. C., Asselta, R., Malcovati, M., Peyvandi, F., Santagostino, E., Mannucci, P. M., Tenchini, M. L.
<strong>Arg2074-to-cys missense mutation in the C2 domain of factor V causing moderately severe factor V deficiency: molecular characterization by expression of the recombinant protein.</strong>
Blood 101: 173-177, 2003.
[PubMed: 12393490]
[Full Text: https://doi.org/10.1182/blood-2002-06-1928]
</p>
</li>
<li>
<p class="mim-text-font">
Faisel, F., Romppanen, E.-L., Hiltunen, M., Helisalmi, S., Laasanen, J., Punnonen, K., Salonen, J. T., Heinonen, S.
<strong>Susceptibility to pre-eclampsia in Finnish women is associated with R485K polymorphism in the factor V gene, not with Leiden mutation.</strong>
Europ. J. Hum. Genet. 12: 187-191, 2004.
[PubMed: 14673478]
[Full Text: https://doi.org/10.1038/sj.ejhg.5201124]
</p>
</li>
<li>
<p class="mim-text-font">
Gerhardt, A., Scharf, R. E., Beckmann, M. W., Struve, S., Bender, H. G., Pillny, M., Sandmann, W., Zotz, R. B.
<strong>Prothrombin and factor V mutations in women with a history of thrombosis during pregnancy and the puerperium.</strong>
New Eng. J. Med. 342: 374-380, 2000.
[PubMed: 10666427]
[Full Text: https://doi.org/10.1056/NEJM200002103420602]
</p>
</li>
<li>
<p class="mim-text-font">
Greengard, J. S., Sun, X., Xu, X., Fernandez, J. A., Griffin, J. H., Evatt, B.
<strong>Activated protein C resistance caused by arg506gln mutation in factor Va. (Letter)</strong>
Lancet 343: 1361-1362, 1994.
[PubMed: 7910348]
[Full Text: https://doi.org/10.1016/s0140-6736(94)92497-x]
</p>
</li>
<li>
<p class="mim-text-font">
Gregg, J. P., Yamane, A. J., Grody, W. W.
<strong>Prevalence of the factor V-Leiden mutation in four distinct American ethnic populations.</strong>
Am. J. Med. Genet. 73: 334-336, 1997.
[PubMed: 9415695]
[Full Text: https://doi.org/10.1002/(sici)1096-8628(19971219)73:3&lt;334::aid-ajmg20&gt;3.0.co;2-j]
</p>
</li>
<li>
<p class="mim-text-font">
Guasch, J. F., Cannegieter, S., Reitsma, P. H., van't Veer-Korthof, E. T., Bertina, R. M.
<strong>Severe coagulation factor V deficiency caused by a 4 bp deletion in the factor V gene.</strong>
Brit. J. Haemat. 101: 32-39, 1998.
[PubMed: 9576178]
[Full Text: https://doi.org/10.1046/j.1365-2141.1998.00664.x]
</p>
</li>
<li>
<p class="mim-text-font">
Guasch, J. F., Lensen, R. P. M., Bertina, R. M.
<strong>Molecular characterization of a type I quantitative factor V deficiency in a thrombosis patient that is &#x27;pseudo homozygous&#x27; for activated protein C resistance.</strong>
Thromb. Haemost. 77: 252-257, 1997.
[PubMed: 9157576]
</p>
</li>
<li>
<p class="mim-text-font">
Gurakan, F., Gurgey, A., Bakkaloglu, A., Kocak, N.
<strong>Homozygous factor V Leiden mutation in a child with Budd-Chiari syndrome.</strong>
J. Pediat. Gastroent. Nutr. 28: 516-517, 1999.
[PubMed: 10328130]
[Full Text: https://doi.org/10.1097/00005176-199905000-00016]
</p>
</li>
<li>
<p class="mim-text-font">
Gurgey, A., Mesci, L.
<strong>The prevalence of factor V Leiden (1691G-A) mutation in Turkey.</strong>
Turk. J. Pediat. 39: 313-315, 1997.
[PubMed: 9339109]
</p>
</li>
<li>
<p class="mim-text-font">
Hao, K., Wang, X., Niu, T., Xu, X., Li, A., Chang, W., Wang, L., Li, G., Laird, N., Xu., X.
<strong>A candidate gene association study on preterm delivery: application of high-throughput genotyping technology and advanced statistical methods.</strong>
Hum. Molec. Genet. 13: 683-691, 2004.
[PubMed: 14976157]
[Full Text: https://doi.org/10.1093/hmg/ddh091]
</p>
</li>
<li>
<p class="mim-text-font">
Hayward, C. P. M., Cramer, E. M., Kane, W. H., Zheng, S., Bouchard, M., Masse, J.-M., Rivard, G. E.
<strong>Studies of a second family with the Quebec platelet disorder: evidence that the degradation of the alpha-granule membrane and its soluble contents are not secondary to a defect in targeting proteins to alpha-granules.</strong>
Blood 89: 1243-1253, 1997.
[PubMed: 9028947]
</p>
</li>
<li>
<p class="mim-text-font">
Hayward, C. P. M., Rivard, G. E., Kane, W. H., Drouin, J., Zheng, S., Moore, J. C., Kelton, J. G.
<strong>An autosomal dominant, qualitative platelet disorder associated with multimerin deficiency, abnormalities in platelet factor V, thrombospondin, von Willebrand factor, and fibrinogen and an epinephrine aggregation defect.</strong>
Blood 87: 4967-4978, 1996.
[PubMed: 8652809]
</p>
</li>
<li>
<p class="mim-text-font">
Janeway, C., Rivard, G. E., Tracy, P. B., Mann, K. G.
<strong>Factor V Quebec revisited.</strong>
Blood 87: 3571 only, 1996.
[PubMed: 8611679]
</p>
</li>
<li>
<p class="mim-text-font">
Jenny, R. J., Pittman, D. D., Toole, J. J., Kriz, R. W., Aldape, R. A., Hewick, R. M., Kaufman, R. J., Mann, K. G.
<strong>Complete cDNA and derived amino acid sequence of human factor V.</strong>
Proc. Nat. Acad. Sci. 84: 4846-4850, 1987.
[PubMed: 3110773]
[Full Text: https://doi.org/10.1073/pnas.84.14.4846]
</p>
</li>
<li>
<p class="mim-text-font">
Juul, K., Tybjaerg-Hansen, A., Schnohr, P., Nordestgaard, B. G.
<strong>Factor V Leiden and the risk for venous thromboembolism in the adult Danish population.</strong>
Ann. Intern. Med. 140: 330-337, 2004.
[PubMed: 14996674]
[Full Text: https://doi.org/10.7326/0003-4819-140-5-200403020-00008]
</p>
</li>
<li>
<p class="mim-text-font">
Kane, W. H., Davie, E. W.
<strong>Cloning of a cDNA coding for human factor V, a blood coagulation factor homologous to factor VIII and ceruloplasmin.</strong>
Proc. Nat. Acad. Sci. 83: 6800-6804, 1986.
[PubMed: 3092220]
[Full Text: https://doi.org/10.1073/pnas.83.18.6800]
</p>
</li>
<li>
<p class="mim-text-font">
Kane, W. H., Ichinose, A., Hagen, F. S., Davie, E. W.
<strong>Cloning of cDNAs coding for the heavy chain region and connecting region of human factor V, a blood coagulation factor with four types of internal repeats.</strong>
Biochemistry 26: 6508-6514, 1987.
[PubMed: 2827731]
[Full Text: https://doi.org/10.1021/bi00394a033]
</p>
</li>
<li>
<p class="mim-text-font">
Kemkes-Matthes, B., Matthes, K. J., Souri, M., Koseki-Kuno, S., Ichinose, A.
<strong>R225H amino acid substitution of protein Z identified in patients with factor V Leiden mutation.</strong>
Brit. J. Haemat. 128: 248-252, 2005.
[PubMed: 15638861]
[Full Text: https://doi.org/10.1111/j.1365-2141.2004.05297.x]
</p>
</li>
<li>
<p class="mim-text-font">
Koeleman, B. P. C., Reitsma, P. H., Allaart, C. F., Bertina, R. M.
<strong>Activated protein C resistance as an additional risk factor for thrombosis in protein C-deficient families.</strong>
Blood 84: 1031-1035, 1994.
[PubMed: 8049422]
</p>
</li>
<li>
<p class="mim-text-font">
Leebeek, F. W. G., Lameris, J. S., van Buuren, H. R., Gomez, E., Madretsma, S., Sonneveld, P.
<strong>Budd-Chiari syndrome, portal vein and mesenteric vein thrombosis in a patient homozygous for factor V Leiden mutation treated by TIPS and thrombolysis.</strong>
Brit. J. Haemat. 102: 929-931, 1998.
[PubMed: 9734642]
[Full Text: https://doi.org/10.1046/j.1365-2141.1998.00860.x]
</p>
</li>
<li>
<p class="mim-text-font">
Liang, R., Lee, C. K., Wat, M. S., Kwong, Y. L., Lam, C. K., Liu, H. W.
<strong>Clinical significance of arg306 mutations of factor V gene. (Letter)</strong>
Blood 92: 2599-2600, 1998.
[PubMed: 9746807]
</p>
</li>
<li>
<p class="mim-text-font">
Lindqvist, P. G., Svensson, P. J., Dahlback, B., Marsal, K.
<strong>Factor V Q-506 mutation (activated protein C resistance) associated with reduced intrapartum blood loss: a possible evolutionary selection mechanism.</strong>
Thromb. Haemost. 79: 69-73, 1998.
[PubMed: 9459326]
</p>
</li>
<li>
<p class="mim-text-font">
Lindqvist, P. G., Zoller, B., Dahlback, B.
<strong>Improved hemoglobin status and reduced menstrual blood loss among female carriers of factor V Leiden: an evolutionary advantage? (Letter)</strong>
Thromb. Haemost. 86: 1122-1123, 2001.
[PubMed: 11686338]
</p>
</li>
<li>
<p class="mim-text-font">
Macedo-Ribeiro, S., Bode, W., Huber, R., Quinn-Allen, M. A., Kim, S. W., Ortel, T. L., Bourenkov, G. P., Bartunik, H. D., Stubbs, M. T., Kane, W. H., Fuentes-Prior, P.
<strong>Crystal structures of the membrane-binding C2 domain of human coagulation factor V.</strong>
Nature 402: 434-439, 1999.
[PubMed: 10586886]
[Full Text: https://doi.org/10.1038/46594]
</p>
</li>
<li>
<p class="mim-text-font">
Mahmoud, A. E. A., Elias, E., Beauchamp, N., Wilde, J. T.
<strong>Prevalence of the factor V Leiden mutation in hepatic and portal vein thrombosis.</strong>
Gut 40: 798-800, 1997.
[PubMed: 9245936]
[Full Text: https://doi.org/10.1136/gut.40.6.798]
</p>
</li>
<li>
<p class="mim-text-font">
Majerus, P. W.
<strong>Bad blood by mutation.</strong>
Nature 369: 14-15, 1994.
[PubMed: 8164730]
[Full Text: https://doi.org/10.1038/369014a0]
</p>
</li>
<li>
<p class="mim-text-font">
Mann, K. G., Kalafatis, M.
<strong>Factor V: a combination of Dr Jekyll and Mr Hyde.</strong>
Blood 101: 20-30, 2003.
[PubMed: 12393635]
[Full Text: https://doi.org/10.1182/blood-2002-01-0290]
</p>
</li>
<li>
<p class="mim-text-font">
Martinelli, I., Taioli, E., Cetin, I., Marinoni, A., Gerosa, S., Villa, M. V., Bozzo, M., Mannucci, P. M.
<strong>Mutations in coagulation factors in women with unexplained late fetal loss.</strong>
New Eng. J. Med. 343: 1015-1018, 2000.
[PubMed: 11018168]
[Full Text: https://doi.org/10.1056/NEJM200010053431405]
</p>
</li>
<li>
<p class="mim-text-font">
McAlpine, P. J., Coopland, G., Guy, C., James, S., Komarnicki, L., MacDonald, M., Stranc, L., Lewis, M., Philipps, S., Coghlan, G., Kaita, H., Cox, D. W., Guinto, E. R., MacGillivray, R.
<strong>Mapping the genes for erythrocytic alpha-spectrin 1 (SPTA1) and coagulation factor V (F5). (Abstract)</strong>
Cytogenet. Cell Genet. 51: 1042, 1989.
</p>
</li>
<li>
<p class="mim-text-font">
Meinardi, J. R., Pelsma, P. M., Koning, H., van der Meer, J., Middeldorp, S., Buller, H. R., Hamulyak, K.
<strong>Double-homozygosity for factor V Leiden and the prothrombin gene G20210A variant in a young patient with idiopathic venous thrombosis. (Letter)</strong>
Blood 94: 1828-1829, 1999.
[PubMed: 10507841]
</p>
</li>
<li>
<p class="mim-text-font">
Meyer, M., Kutscher, G., Vogel, G.
<strong>Simultaneous genotyping for factor V Leiden and prothrombin G20210A variant by a multiplex PCR-SSCP assay on whole blood. (Letter)</strong>
Thromb. Haemost. 81: 162-163, 1999.
[PubMed: 10348711]
</p>
</li>
<li>
<p class="mim-text-font">
Mumford, A. D., McVey, J. H., Morse, C. V., Gomez, K., Steen, M., Norstrom, E. A., Tuddenham, E. G. D., Dahlback, B., Bolton-Maggs, P. H. B.
<strong>Factor V I359T: a novel mutation associated with thrombosis and resistance to activated protein C.</strong>
Brit. J. Haemat. 123: 496-501, 2003.
[PubMed: 14617013]
[Full Text: https://doi.org/10.1046/j.1365-2141.2003.04624.x]
</p>
</li>
<li>
<p class="mim-text-font">
Riddell, D. C., Wang, H., Royle, N. J., Nigli, M., Guinto, E., Kochinsky, M. L., Irwin, D. M., Cool, D., MacGillivray, R. T. A., Hamerton, J. L.
<strong>Regional assignment for the human genes encoding FII, FV, FXIII, ceruloplasmin and pseudoceruloplasmin. (Abstract)</strong>
Cytogenet. Cell Genet. 46: 682, 1987.
</p>
</li>
<li>
<p class="mim-text-font">
Ridker, P. M., Hennekens, C. H., Lindpaintner, K., Stampfer, M. J., Eisenberg, P. R., Miletich, J. P.
<strong>Mutation in the gene coding for coagulation factor V and the risk of myocardial infarction, stroke, and venous thrombosis in apparently healthy men.</strong>
New Eng. J. Med. 332: 912-917, 1995.
[PubMed: 7877648]
[Full Text: https://doi.org/10.1056/NEJM199504063321403]
</p>
</li>
<li>
<p class="mim-text-font">
Ridker, P. M., Miletich, J. P., Stampfer, M. J., Goldhaber, S. Z., Lindpaintner, K., Hennekens, C. H.
<strong>Factor V Leiden and risks of recurrent idiopathic venous thromboembolism.</strong>
Circulation 92: 2800-2802, 1995.
[PubMed: 7586244]
[Full Text: https://doi.org/10.1161/01.cir.92.10.2800]
</p>
</li>
<li>
<p class="mim-text-font">
Steen, M., Norstrom, E. A., Tholander, A.-L., Bolton-Maggs, P. H. B., Mumford, A., McVey, J. H., Tuddenham, E. G. D., Dahlback, B.
<strong>Functional characterization of factor V-ile359-to-thr: a novel mutation associated with thrombosis.</strong>
Blood 103: 3381-3387, 2004.
[PubMed: 14695241]
[Full Text: https://doi.org/10.1182/blood-2003-06-2092]
</p>
</li>
<li>
<p class="mim-text-font">
Talmon, T., Scharf, J., Mayer, E., Lanir, N., Miller, B., Brenner, B.
<strong>Retinal arterial occlusion in a child with factor V Leiden and thermolabile methylene tetrahydrofolate reductase mutations.</strong>
Am. J. Ophthal. 124: 689-691, 1997.
[PubMed: 9372726]
[Full Text: https://doi.org/10.1016/s0002-9394(14)70910-9]
</p>
</li>
<li>
<p class="mim-text-font">
Tanis, B. C., van der Meer, F. J., Bloem, R. M., Vlasveld, L. T.
<strong>Successful excision of a pseudotumour in a congenitally factor V deficient patient.</strong>
Brit. J. Haemat. 100: 380-382, 1998.
[PubMed: 9488630]
[Full Text: https://doi.org/10.1046/j.1365-2141.1998.00570.x]
</p>
</li>
<li>
<p class="mim-text-font">
Tracy, P. B., Giles, A. R., Mann, K. G., Eide, L. L., Hoogendoorn, H., Rivard, G. E.
<strong>Factor V (Quebec): a bleeding diathesis associated with a qualitative platelet factor V deficiency.</strong>
J. Clin. Invest. 74: 1221-1228, 1984.
[PubMed: 6480825]
[Full Text: https://doi.org/10.1172/JCI111531]
</p>
</li>
<li>
<p class="mim-text-font">
van Wijk, R., Montefusco, M. C., Duga, S., Asselta, R., van Solinge, W., Malcovati, M., Tenchini, M. L., Mannucci, P. M.
<strong>Coexistence of a novel homozygous nonsense mutation in exon 13 of the factor V gene with the homozygous Leiden mutation in two unrelated patients with severe factor V deficiency.</strong>
Brit. J. Haemat. 114: 871-874, 2001.
[PubMed: 11564077]
[Full Text: https://doi.org/10.1046/j.1365-2141.2001.03016.x]
</p>
</li>
<li>
<p class="mim-text-font">
van Wijk, R., Nieuwenhuis, K., van den Berg, M., Huizinga, E. G., van der Meijden, B. B., Kraaijenhagen, R. J., van Solinge, W. W.
<strong>Five novel mutations in the gene for human blood coagulation factor V associated with type I factor V deficiency.</strong>
Blood 98: 358-367, 2001.
[PubMed: 11435304]
[Full Text: https://doi.org/10.1182/blood.v98.2.358]
</p>
</li>
<li>
<p class="mim-text-font">
Voorberg, J., Roelse, J., Koopman, R., Buller, H., Berends, F., ten Cate, J. W., Mertens, K., van Mourik, J. A.
<strong>Association of idiopathic venous thromboembolism with single point-mutation at arg506 of factor V.</strong>
Lancet 343: 1535-1536, 1994.
[PubMed: 7911872]
[Full Text: https://doi.org/10.1016/s0140-6736(94)92939-4]
</p>
</li>
<li>
<p class="mim-text-font">
Wang, H., Riddell, D. C., Guinto, E. R., MacGillivray, R. T. A., Hamerton, J. L.
<strong>Localization of the gene encoding human factor V to chromosome 1q21-25.</strong>
Genomics 2: 324-328, 1988.
[PubMed: 3220473]
[Full Text: https://doi.org/10.1016/0888-7543(88)90021-3]
</p>
</li>
<li>
<p class="mim-text-font">
Westendorp, R. G. J., Reitsma, P. H., Bertina, R. M.
<strong>Inherited prethrombotic disorders and infectious purpura.</strong>
Thromb. Haemost. 75: 899-901, 1996.
[PubMed: 8822583]
</p>
</li>
<li>
<p class="mim-text-font">
Williamson, D., Brown, K., Luddington, R., Baglin, C., Baglin, T.
<strong>Factor V Cambridge: a new mutation (arg306-to-thr) associated with resistance to activated protein C.</strong>
Blood 91: 1140-1144, 1998.
[PubMed: 9454742]
</p>
</li>
<li>
<p class="mim-text-font">
Zehnder, J. L., Hiraki, D. D., Jones, C. D., Gross, N., Grumet, F. C.
<strong>Familial coagulation factor V deficiency caused by a novel 4 base pair insertion in the factor V gene: factor V Stanford.</strong>
Thromb. Haemost. 82: 1097-1099, 1999. Note: Erratum: Thromb. Haemost. 82: XII only, 1999.
[PubMed: 10494770]
</p>
</li>
<li>
<p class="mim-text-font">
Zehnder, J. L., Jain, M.
<strong>Recurrent thrombosis due to compound heterozygosity for factor V Leiden and factor V deficiency.</strong>
Blood Coagul. Fibrinolysis 7: 361-362, 1996.
[PubMed: 8735145]
[Full Text: https://doi.org/10.1097/00001721-199604000-00012]
</p>
</li>
<li>
<p class="mim-text-font">
Zivelin, A., Mor-Cohen, R., Kovalsky, V., Kornbrot, N., Conard, J., Peyvandi, F., Kyrle, P. A., Bertina, R., Peyvandi, F., Emmerich, J., Seligsohn, U.
<strong>Prothrombin 20210G-A is an ancestral prothrombotic mutation that occurred in whites approximately 24,000 years ago.</strong>
Blood 107: 4666-4668, 2006.
[PubMed: 16493002]
[Full Text: https://doi.org/10.1182/blood-2005-12-5158]
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