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<title>
Entry
- *613715 - POLYMERASE I, RNA, SUBUNIT D; POLR1D
- OMIM
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<span class="h4">*613715</span>
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<strong>Table of Contents</strong>
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<a href="#text"><strong>Text</strong></a>
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<a href="#cloning">Cloning and Expression</a>
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<a href="#mapping">Mapping</a>
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<a href="#geneFunction">Gene Function</a>
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<a href="#molecularGenetics">Molecular Genetics</a>
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<a href="#allelicVariants"><strong>Allelic Variants</strong></a>
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</span>
</span>
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<div id="mimProteinLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.proteinatlas.org/search/POLR1D" 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/4689136,7705740,12654143,15929794,17391253,22749407,31455208,119628820,119628821,189053153,330864729,1034584522,1279751559,1279751560,1751137376,2217294422,2462537215,2462537217" 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/?query=P0DPB5 OR P0DPB6" 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>
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<div id="mimGeneInfoLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Gene Info</div>
</div>
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</span>
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<div id="mimGeneInfoLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
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<div><a href="http://biogps.org/#goto=genereport&id=51082" 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=ENSG00000186184;t=ENST00000302979" 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=POLR1D" 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=POLR1D" 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+51082" 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/POLR1D" 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:51082" 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/51082" 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=chr13&hgg_gene=ENST00000302979.5&hgg_start=27620743&hgg_end=27667411&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>
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<div id="mimClinicalResourcesLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5; display: table-cell;">&#9658;</div>
&nbsp;
<div style="display: table-cell;">Clinical Resources</div>
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<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:20422" 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://medlineplus.gov/genetics/gene/polr1d" 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=613715[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>
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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="mimVariation">
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<span id="mimVariationLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9660;</span> Variation
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<div class="panel-body small mim-panel-body">
<div><a href="https://www.ncbi.nlm.nih.gov/clinvar?term=613715[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/POLR1D/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/ENSG00000186184" 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=POLR1D" 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=POLR1D" 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=POLR1D" 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=POLR1D&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/PA134914527" 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>
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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="mimAnimalModels">
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<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>
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<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:20422" 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://flybase.org/reports/FBgn0086447.html" class="mim-tip-hint" title="A Database of Drosophila Genes and Genomes." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'FlyBase', 'domain': 'flybase.org'})">FlyBase</a></div>
<div><a href="https://www.mousephenotype.org/data/genes/MGI:108403" 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/POLR1D#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:108403" 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/51082/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=51082" 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://wormbase.org/db/gene/gene?name=WBGene00010230;class=Gene" class="mim-tip-hint" title="Database of the biology and genome of Caenorhabditis elegans and related nematodes." target="_blank" onclick="gtag('event', 'mim_outbound', {'name'{'name': 'Wormbase Gene', 'domain': 'wormbase.org'})">Wormbase Gene</a></div>
<div><a href="https://zfin.org/ZDB-GENE-040930-4" 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">
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<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>
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<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:51082" 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=POLR1D&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">
&nbsp;
</div>
<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Gene description">
<span class="text-danger"><strong>*</strong></span>
613715
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
POLYMERASE I, RNA, SUBUNIT D; POLR1D
</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">
RNA POLYMERASE A, 16-KD, MOUSE, HOMOLOG OF; RPA16<br />
RPAC2
</span>
</h4>
</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=POLR1D" class="mim-tip-hint" title="HUGO Gene Nomenclature Committee." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HGNC', 'domain': 'genenames.org'})">POLR1D</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/13/59?start=-3&limit=10&highlight=59">13q12.2</a>
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : <a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&position=chr13:27620743-27667411&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'})">13:27,620,743-27,667,411</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
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
</tr>
</thead>
<tbody>
<tr>
<td rowspan="1">
<span class="mim-font">
<a href="/geneMap/13/59?start=-3&limit=10&highlight=59">
13q12.2
</a>
</span>
</td>
<td>
<span class="mim-font">
Treacher Collins syndrome 2
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613717"> 613717 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <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>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group">
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
PheneGene Graphics <span class="caret"></span>
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<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/613715" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/613715" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
</div>
<div>
<br />
</div>
<div>
<a id="text" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<span class="mim-tip-floating" qtip_title="<strong>Looking For More References?</strong>" qtip_text="Click the 'reference plus' icon &lt;span class='glyphicon glyphicon-plus-sign'&gt;&lt;/span&gt at the end of each OMIM text paragraph to see more references related to the content of the preceding paragraph.">
<strong>TEXT</strong>
</span>
</span>
</h4>
<div>
<a id="cloning" class="mim-anchor"></a>
<h4 href="#mimCloningFold" id="mimCloningToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimCloningToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Cloning and Expression</strong>
</span>
</h4>
</div>
<div id="mimCloningFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p>Using mouse Rpa40 (POLR1C; <a href="/entry/610060">610060</a>) as bait in a yeast 2-hybrid system, <a href="#4" class="mim-tip-reference" title="Yao, Y., Yamamoto, K, Nishi, Y., Nogi, Y., Muramatsu, M. &lt;strong&gt;Mouse RNA polymerase I 16-kDa subunit able to associate with 40-kDa subunit is a homolog of yeast AC19 subunit of RNA polymerases I and III.&lt;/strong&gt; J. Biol. Chem. 271: 32881-32885, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8955128/&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;8955128&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1074/jbc.271.51.32881&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="8955128">Yao et al. (1996)</a> cloned mouse Polr1d, which they called Rpa16. The deduced 133-amino acid protein has a calculated molecular mass of 15.1 kD. It shares 45% amino acid identity with the yeast subunit Ac19 of RNA polymerases I and III. SDS-PAGE and Western blot analysis showed that Rpa16 encodes the 16-kD subunit of mouse RNA polymerase I. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8955128" 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>
</span>
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<br />
</div>
</div>
<div>
<a id="mapping" class="mim-anchor"></a>
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<strong>Mapping</strong>
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<p><a href="#1" class="mim-tip-reference" title="Amberger, J. S. &lt;strong&gt;Personal Communication.&lt;/strong&gt; Baltimore, Maryland 1/28/2011."None>Amberger (2011)</a> found that the mouse Polr1d sequence (GenBank <a href="https://www.ncbi.nlm.nih.gov/search/all/?term=D86609" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'GENBANK\', \'domain\': \'ncbi.nlm.nih.gov\'})">D86609</a>) reported by <a href="#4" class="mim-tip-reference" title="Yao, Y., Yamamoto, K, Nishi, Y., Nogi, Y., Muramatsu, M. &lt;strong&gt;Mouse RNA polymerase I 16-kDa subunit able to associate with 40-kDa subunit is a homolog of yeast AC19 subunit of RNA polymerases I and III.&lt;/strong&gt; J. Biol. Chem. 271: 32881-32885, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8955128/&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;8955128&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1074/jbc.271.51.32881&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="8955128">Yao et al. (1996)</a> shares 92% identity with variant 1 of the human POLR1D gene (GenBank <a href="https://www.ncbi.nlm.nih.gov/search/all/?term=NM_015972" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'GENBANK\', \'domain\': \'ncbi.nlm.nih.gov\'})">NM_015972</a>), which maps to chromosome 13q12.2 (GRCh37). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8955128" 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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<span id="mimGeneFunctionToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Gene Function</strong>
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<p>Using yeast 2-hybrid analysis, <a href="#4" class="mim-tip-reference" title="Yao, Y., Yamamoto, K, Nishi, Y., Nogi, Y., Muramatsu, M. &lt;strong&gt;Mouse RNA polymerase I 16-kDa subunit able to associate with 40-kDa subunit is a homolog of yeast AC19 subunit of RNA polymerases I and III.&lt;/strong&gt; J. Biol. Chem. 271: 32881-32885, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8955128/&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;8955128&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1074/jbc.271.51.32881&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="8955128">Yao et al. (1996)</a> showed that mouse Rpa16 interacted with mouse Rpa40, and mutation analysis revealed that the alpha motif of Rpa40 was required for the interaction. Neither Rpa40 nor Rpa16 could self-associate in the yeast 2-hybrid system. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8955128" 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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<span id="mimMolecularGeneticsToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Molecular Genetics</strong>
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<p>In a 3-year-old boy with Treacher Collins syndrome (TCS2; <a href="/entry/613717">613717</a>) who was negative for mutation in the TCOF1 gene (<a href="/entry/606847">606847</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> performed genomewide copy number analysis and identified a 156-kb de novo deletion at chromosome 13q12.2 that encompassed the entire POLR1D gene and exon 1 of the LNX2 gene (<a href="/entry/609733">609733</a>). Sequence analysis of POLR1D and LNX2 in 10 additional Treacher Collins patients who were negative for mutations in TCOF1 revealed a boy who was heterozygous for a nonsense mutation in POLR1D (R87X; <a href="#0001">613715.0001</a>). Analysis of POLR1D in a further 242 individuals with typical TCS or with clinical findings in the TCS phenotypic spectrum who were negative for TCOF1 mutations yielded 10 heterozygous nonsense mutations and 7 heterozygous missense mutations in 20 index cases (see, e.g., <a href="#0002">613715.0002</a>-<a href="#0006">613715.0006</a>). Nineteen of the 20 mutations were in exon 3 of the POLR1D gene; 1 patient had a splice site mutation in intron 2. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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="Schaefer, E., Collet, C., Genevieve, D., Vincent, M., Lohmann, D. R., Sanchez, E., Bolender, C., Eliot, M.-M., Nurnberg, G., Passos-Bueno, M.-R., Wieczorek, D., Van Maldergem, L., Doray, B. &lt;strong&gt;Autosomal recessive POLR1D mutation with decrease of TCOF1 mRNA is responsible for Treacher Collins syndrome.&lt;/strong&gt; Genet. Med. 16: 720-724, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24603435/&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;24603435&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/gim.2014.12&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="24603435">Schaefer et al. (2014)</a> reported 4 affected children from 2 unrelated consanguineous families with mild Treacher Collins syndrome who shared the same homozygous missense mutation in the POLR1D gene (L55V; <a href="#0007">613715.0007</a>). This mutation was localized to the region encoding the dimerization domain of the RNA polymerase. A functional analysis of TCOF1 by real-time quantitative RT-PCR was performed in the first family, demonstrating a 50% reduction of transcripts in the index case, compatible with the hypothesis that this mutation impairs RNA polymerase and results in a lower amount of mature dimeric ribosomes. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24603435" 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 id="mimAllelicVariantsToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<strong>ALLELIC VARIANTS (<a href="/help/faq#1_4"></strong>
</span>
<strong>7 Selected Examples</a>):</strong>
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</h4>
<div>
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<div id="mimAllelicVariantsFold" class="collapse in mimTextToggleFold">
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<a href="/allelicVariants/613715" class="btn btn-default" role="button"> Table View </a>
&nbsp;&nbsp;<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=613715[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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<span class="mim-font">
<strong>.0001&nbsp;TREACHER COLLINS SYNDROME 2</strong>
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POLR1D, ARG87TER
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<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs1593275599 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs1593275599;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=rs1593275599" 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=rs1593275599" 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=RCV000024043 OR RCV001778661" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000024043, RCV001778661" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000024043...</a>
</span>
</div>
<div>
<span class="mim-text-font">
<p>In the probands from 3 unrelated families with Treacher Collins syndrome-2 (TCS2; <a href="/entry/613717">613717</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> identified heterozygosity for a c.259C-T transition in exon 3 of the POLR1D gene, resulting in an arg87-to-ter (R87X) substitution. The mutation was not found in 280 controls. Two families demonstrated nonpenetrance: in 1 family, there were 2 affected brothers as well as 3 unaffected family members (their father, his twin brother, and the paternal grandfather) who carried the mutation. In another family, the mutation was present in an affected brother and sister and the sister's affected daughter, as well as their unaffected mother. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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="0002" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>.0002&nbsp;TREACHER COLLINS SYNDROME 2</strong>
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POLR1D, GLU47LYS
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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> rs767196650 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs767196650;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/rs767196650?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=rs767196650" 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=rs767196650" 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=RCV000024044 OR RCV002513218" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000024044, RCV002513218" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000024044...</a>
</span>
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<div>
<span class="mim-text-font">
<p>In 2 brothers and an unrelated proband with Treacher Collins syndrome-2 (TCS2; <a href="/entry/613717">613717</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> identified heterozygosity for a c.139G-A transition in exon 3 of the POLR1D gene, resulting in a glu47-to-lys (E47K) substitution at an evolutionarily conserved residue in the RNA polymerase dimerization domain of POLR1D. The mutation, which was not found in 280 controls, was predicted to disrupt dimerization of the alpha subunits. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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="0003" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>.0003&nbsp;TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
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POLR1D, LEU51ARG
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</span>
&nbsp;&nbsp;
<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs1593275448 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs1593275448;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=rs1593275448" 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=rs1593275448" 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=RCV000024045" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000024045" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000024045</a>
</span>
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<span class="mim-text-font">
<p>In a mother and 2 daughters with Treacher Collins syndrome-2 (TCS2; <a href="/entry/613717">613717</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> identified heterozygosity for a c.152T-G transversion in exon 3 of the POLR1D gene, resulting in a leu51-to-arg (L51R) substitution at an evolutionarily conserved residue in the RNA polymerase dimerization domain of POLR1D. The mutation, which was not found in 280 controls, was predicted to disrupt dimerization of the alpha subunits. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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>
<h4>
<span class="mim-font">
<strong>.0004&nbsp;TREACHER COLLINS SYNDROME 2</strong>
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</h4>
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<span class="mim-text-font">
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POLR1D, 2-BP DEL, 326CA
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</span>
&nbsp;&nbsp;
<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs2138519194 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs2138519194;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=rs2138519194" 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=rs2138519194" 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=RCV000024046" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000024046" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000024046</a>
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a 3-generation family segregating autosomal dominant Treacher Collins syndrome-2 (TCS2; <a href="/entry/613717">613717</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> identified heterozygosity for a 2-bp deletion (c.326delCA) in exon 3 of the POLR1D gene, predicted to cause a frameshift resulting in a premature termination codon. The mutation was present in 3 affected family members, the proband, his father, and his paternal grandfather; it was not found in 280 controls. The proband's only manifestation of TCS was mandibular hypoplasia. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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>
</span>
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<div>
<br />
</div>
</div>
<div>
<div>
<a id="0005" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>.0005&nbsp;TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
<div style="float: left;">
POLR1D, 2-BP DUP, 263G
</div>
</span>
&nbsp;&nbsp;
<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs1593275616 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs1593275616;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=rs1593275616" 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=rs1593275616" 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=RCV000024047" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000024047" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000024047</a>
</span>
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<div>
<span class="mim-text-font">
<p>In a father and daughter with Treacher Collins syndrome-2 (TCS2; <a href="/entry/613717">613717</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> identified heterozygosity for a 2-bp duplication (c.263dupG) in exon 3 of the POLR1D gene, predicted to cause a frameshift resulting in a premature termination codon. The mutation was not found in 280 controls. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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>
</span>
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<div>
<div>
<a id="0006" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>.0006&nbsp;TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
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<span class="mim-text-font">
<div style="float: left;">
POLR1D, 2-BP INS, 88TG
</div>
</span>
&nbsp;&nbsp;
<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs1593275363 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs1593275363;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=rs1593275363" 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=rs1593275363" 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=RCV000024048" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000024048" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000024048</a>
</span>
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<div>
<span class="mim-text-font">
<p>In a mother and daughter with Treacher Collins syndrome-2 (TCS2; <a href="/entry/613717">613717</a>), <a href="#2" class="mim-tip-reference" title="Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D. &lt;strong&gt;Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.&lt;/strong&gt; Nature Genet. 43: 20-22, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21131976/&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;21131976&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng.724&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="21131976">Dauwerse et al. (2011)</a> identified heterozygosity for a 2-bp insertion (c.88insTG) in exon 3 of the POLR1D gene, resulting in a frameshift and premature termination codon. The mutation was not found in 280 controls. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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>
</span>
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<a id="0007" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>.0007&nbsp;TREACHER COLLINS SYNDROME 2, AUTOSOMAL RECESSIVE</strong>
</span>
</h4>
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POLR1D, LEU55VAL
</div>
</span>
&nbsp;&nbsp;
<div class="btn-group"> <button type="button" class="btn btn-default btn-xs dropdown-toggle mim-font" data-toggle="dropdown">rs587777841 <span class="caret"></span></button> <ul class="dropdown-menu"> <li><a href="https://www.ensembl.org/Homo_sapiens/Variation/Summary?v=rs587777841;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=rs587777841" 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=rs587777841" 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=RCV000144520 OR RCV003319179" target="_blank" class="btn btn-default btn-xs mim-tip-hint" title="RCV000144520, RCV003319179" onclick="gtag('event', 'mim_outbound', {'name': 'ClinVar', 'domain': 'ncbi.nlm.nih.gov'})">RCV000144520...</a>
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 4 affected children from 2 unrelated consanguineous families with mild Treacher Collins syndrome (TCS2; <a href="/entry/613717">613717</a>), <a href="#3" class="mim-tip-reference" title="Schaefer, E., Collet, C., Genevieve, D., Vincent, M., Lohmann, D. R., Sanchez, E., Bolender, C., Eliot, M.-M., Nurnberg, G., Passos-Bueno, M.-R., Wieczorek, D., Van Maldergem, L., Doray, B. &lt;strong&gt;Autosomal recessive POLR1D mutation with decrease of TCOF1 mRNA is responsible for Treacher Collins syndrome.&lt;/strong&gt; Genet. Med. 16: 720-724, 2014.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/24603435/&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;24603435&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/gim.2014.12&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="24603435">Schaefer et al. (2014)</a> identified a homozygous c.163C-G transversion resulting in a leu55-to-val (L55V) substitution in the POLR1D gene that was localized to the region encoding the dimerization domain of the RNA polymerase. Both sets of unaffected parents and the unaffected sister of the first proband were heterozygous for the mutation. The mutation was not found in a series of 150 control chromosomes and was not observed in the 1000 Genomes Project or Exome Variant Server databases. The leucine at position 55 is highly conserved across species. This mutation is located in exon 3 of the POLR1D gene, within the hotspot of 8 mutations between amino acids 45 and 57. Haplotype analysis supported the hypothesis that this mutation in the 2 families arose independently and not from a founder effect. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24603435" 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="references"class="mim-anchor"></a>
<h4 href="#mimReferencesFold" id="mimReferencesToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span class="mim-font">
<span id="mimReferencesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<strong>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Amberger2011" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Amberger, J. S.
<strong>Personal Communication.</strong>
Baltimore, Maryland 1/28/2011.
</p>
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<a id="2" class="mim-anchor"></a>
<a id="Dauwerse2011" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D.
<strong>Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.</strong>
Nature Genet. 43: 20-22, 2011.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/21131976/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">21131976</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21131976" 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/ng.724" target="_blank">Full Text</a>]
</p>
</div>
</li>
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<a id="3" class="mim-anchor"></a>
<a id="Schaefer2014" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Schaefer, E., Collet, C., Genevieve, D., Vincent, M., Lohmann, D. R., Sanchez, E., Bolender, C., Eliot, M.-M., Nurnberg, G., Passos-Bueno, M.-R., Wieczorek, D., Van Maldergem, L., Doray, B.
<strong>Autosomal recessive POLR1D mutation with decrease of TCOF1 mRNA is responsible for Treacher Collins syndrome.</strong>
Genet. Med. 16: 720-724, 2014.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/24603435/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">24603435</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=24603435" 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/gim.2014.12" target="_blank">Full Text</a>]
</p>
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<a id="Yao1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Yao, Y., Yamamoto, K, Nishi, Y., Nogi, Y., Muramatsu, M.
<strong>Mouse RNA polymerase I 16-kDa subunit able to associate with 40-kDa subunit is a homolog of yeast AC19 subunit of RNA polymerases I and III.</strong>
J. Biol. Chem. 271: 32881-32885, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8955128/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8955128</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8955128" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1074/jbc.271.51.32881" target="_blank">Full Text</a>]
</p>
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<a id="contributors" class="mim-anchor"></a>
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<a href="#mimCollapseContributors" role="button" data-toggle="collapse"> Contributors: </a>
</span>
</div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
Ada Hamosh - updated : 10/13/2014
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<span class="mim-text-font">
Marla J. F. O'Neill - updated : 1/28/2011
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Creation Date:
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<span class="mim-text-font">
Joanna S. Amberger : 1/28/2011
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<a href="#mimCollapseEditHistory" role="button" data-toggle="collapse"> Edit History: </a>
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<span class="mim-text-font">
alopez : 11/11/2024
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<span class="mim-text-font">
alopez : 10/13/2014<br>terry : 3/1/2011<br>carol : 1/28/2011<br>mgross : 1/28/2011<br>mgross : 1/28/2011<br>mgross : 1/28/2011<br>joanna : 1/28/2011
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<strong>*</strong> 613715
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<span class="mim-font">
POLYMERASE I, RNA, SUBUNIT D; POLR1D
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<span class="mim-font">
<em>Alternative titles; symbols</em>
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<span class="mim-font">
RNA POLYMERASE A, 16-KD, MOUSE, HOMOLOG OF; RPA16<br />
RPAC2
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<strong><em>HGNC Approved Gene Symbol: POLR1D</em></strong>
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<strong>
<em>
Cytogenetic location: 13q12.2
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Genomic coordinates <span class="small">(GRCh38)</span> : 13:27,620,743-27,667,411 </span>
</em>
</strong>
<span class="small">(from NCBI)</span>
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<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="1">
<span class="mim-font">
13q12.2
</span>
</td>
<td>
<span class="mim-font">
Treacher Collins syndrome 2
</span>
</td>
<td>
<span class="mim-font">
613717
</span>
</td>
<td>
<span class="mim-font">
Autosomal dominant; Autosomal recessive
</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>Cloning and Expression</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Using mouse Rpa40 (POLR1C; 610060) as bait in a yeast 2-hybrid system, Yao et al. (1996) cloned mouse Polr1d, which they called Rpa16. The deduced 133-amino acid protein has a calculated molecular mass of 15.1 kD. It shares 45% amino acid identity with the yeast subunit Ac19 of RNA polymerases I and III. SDS-PAGE and Western blot analysis showed that Rpa16 encodes the 16-kD subunit of mouse RNA polymerase I. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Mapping</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Amberger (2011) found that the mouse Polr1d sequence (GenBank D86609) reported by Yao et al. (1996) shares 92% identity with variant 1 of the human POLR1D gene (GenBank NM_015972), which maps to chromosome 13q12.2 (GRCh37). </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Gene Function</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Using yeast 2-hybrid analysis, Yao et al. (1996) showed that mouse Rpa16 interacted with mouse Rpa40, and mutation analysis revealed that the alpha motif of Rpa40 was required for the interaction. Neither Rpa40 nor Rpa16 could self-associate in the yeast 2-hybrid system. </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 a 3-year-old boy with Treacher Collins syndrome (TCS2; 613717) who was negative for mutation in the TCOF1 gene (606847), Dauwerse et al. (2011) performed genomewide copy number analysis and identified a 156-kb de novo deletion at chromosome 13q12.2 that encompassed the entire POLR1D gene and exon 1 of the LNX2 gene (609733). Sequence analysis of POLR1D and LNX2 in 10 additional Treacher Collins patients who were negative for mutations in TCOF1 revealed a boy who was heterozygous for a nonsense mutation in POLR1D (R87X; 613715.0001). Analysis of POLR1D in a further 242 individuals with typical TCS or with clinical findings in the TCS phenotypic spectrum who were negative for TCOF1 mutations yielded 10 heterozygous nonsense mutations and 7 heterozygous missense mutations in 20 index cases (see, e.g., 613715.0002-613715.0006). Nineteen of the 20 mutations were in exon 3 of the POLR1D gene; 1 patient had a splice site mutation in intron 2. </p><p>Schaefer et al. (2014) reported 4 affected children from 2 unrelated consanguineous families with mild Treacher Collins syndrome who shared the same homozygous missense mutation in the POLR1D gene (L55V; 613715.0007). This mutation was localized to the region encoding the dimerization domain of the RNA polymerase. A functional analysis of TCOF1 by real-time quantitative RT-PCR was performed in the first family, demonstrating a 50% reduction of transcripts in the index case, compatible with the hypothesis that this mutation impairs RNA polymerase and results in a lower amount of mature dimeric ribosomes. </p>
</span>
<div>
<br />
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>ALLELIC VARIANTS</strong>
</span>
<strong>7 Selected Examples):</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0001 &nbsp; TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, ARG87TER
<br />
SNP: rs1593275599,
ClinVar: RCV000024043, RCV001778661
</span>
</div>
<div>
<span class="mim-text-font">
<p>In the probands from 3 unrelated families with Treacher Collins syndrome-2 (TCS2; 613717), Dauwerse et al. (2011) identified heterozygosity for a c.259C-T transition in exon 3 of the POLR1D gene, resulting in an arg87-to-ter (R87X) substitution. The mutation was not found in 280 controls. Two families demonstrated nonpenetrance: in 1 family, there were 2 affected brothers as well as 3 unaffected family members (their father, his twin brother, and the paternal grandfather) who carried the mutation. In another family, the mutation was present in an affected brother and sister and the sister's affected daughter, as well as their unaffected mother. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0002 &nbsp; TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, GLU47LYS
<br />
SNP: rs767196650,
gnomAD: rs767196650,
ClinVar: RCV000024044, RCV002513218
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 2 brothers and an unrelated proband with Treacher Collins syndrome-2 (TCS2; 613717), Dauwerse et al. (2011) identified heterozygosity for a c.139G-A transition in exon 3 of the POLR1D gene, resulting in a glu47-to-lys (E47K) substitution at an evolutionarily conserved residue in the RNA polymerase dimerization domain of POLR1D. The mutation, which was not found in 280 controls, was predicted to disrupt dimerization of the alpha subunits. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0003 &nbsp; TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, LEU51ARG
<br />
SNP: rs1593275448,
ClinVar: RCV000024045
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a mother and 2 daughters with Treacher Collins syndrome-2 (TCS2; 613717), Dauwerse et al. (2011) identified heterozygosity for a c.152T-G transversion in exon 3 of the POLR1D gene, resulting in a leu51-to-arg (L51R) substitution at an evolutionarily conserved residue in the RNA polymerase dimerization domain of POLR1D. The mutation, which was not found in 280 controls, was predicted to disrupt dimerization of the alpha subunits. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0004 &nbsp; TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, 2-BP DEL, 326CA
<br />
SNP: rs2138519194,
ClinVar: RCV000024046
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a 3-generation family segregating autosomal dominant Treacher Collins syndrome-2 (TCS2; 613717), Dauwerse et al. (2011) identified heterozygosity for a 2-bp deletion (c.326delCA) in exon 3 of the POLR1D gene, predicted to cause a frameshift resulting in a premature termination codon. The mutation was present in 3 affected family members, the proband, his father, and his paternal grandfather; it was not found in 280 controls. The proband's only manifestation of TCS was mandibular hypoplasia. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0005 &nbsp; TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, 2-BP DUP, 263G
<br />
SNP: rs1593275616,
ClinVar: RCV000024047
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a father and daughter with Treacher Collins syndrome-2 (TCS2; 613717), Dauwerse et al. (2011) identified heterozygosity for a 2-bp duplication (c.263dupG) in exon 3 of the POLR1D gene, predicted to cause a frameshift resulting in a premature termination codon. The mutation was not found in 280 controls. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0006 &nbsp; TREACHER COLLINS SYNDROME 2</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, 2-BP INS, 88TG
<br />
SNP: rs1593275363,
ClinVar: RCV000024048
</span>
</div>
<div>
<span class="mim-text-font">
<p>In a mother and daughter with Treacher Collins syndrome-2 (TCS2; 613717), Dauwerse et al. (2011) identified heterozygosity for a 2-bp insertion (c.88insTG) in exon 3 of the POLR1D gene, resulting in a frameshift and premature termination codon. The mutation was not found in 280 controls. </p>
</span>
</div>
<div>
<br />
</div>
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0007 &nbsp; TREACHER COLLINS SYNDROME 2, AUTOSOMAL RECESSIVE</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
POLR1D, LEU55VAL
<br />
SNP: rs587777841,
ClinVar: RCV000144520, RCV003319179
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 4 affected children from 2 unrelated consanguineous families with mild Treacher Collins syndrome (TCS2; 613717), Schaefer et al. (2014) identified a homozygous c.163C-G transversion resulting in a leu55-to-val (L55V) substitution in the POLR1D gene that was localized to the region encoding the dimerization domain of the RNA polymerase. Both sets of unaffected parents and the unaffected sister of the first proband were heterozygous for the mutation. The mutation was not found in a series of 150 control chromosomes and was not observed in the 1000 Genomes Project or Exome Variant Server databases. The leucine at position 55 is highly conserved across species. This mutation is located in exon 3 of the POLR1D gene, within the hotspot of 8 mutations between amino acids 45 and 57. Haplotype analysis supported the hypothesis that this mutation in the 2 families arose independently and not from a founder effect. </p>
</span>
</div>
<div>
<br />
</div>
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Amberger, J. S.
<strong>Personal Communication.</strong>
Baltimore, Maryland 1/28/2011.
</p>
</li>
<li>
<p class="mim-text-font">
Dauwerse, J. G., Dixon, J., Seland, S., Ruivenkamp, C. A. L., van Haeringen, A., Hoefsloot, L. H., Peters, D. J. M., Clement-de Boers, A., Daumer-Haas, C., Maiwald, R., Zweier, C., Kerr, B., Cobo, A. M., Toral, J. F., Hoogeboom, A. J. M., Lohmann, D. R., Hehr, U., Dixon, M. J., Breuning, M. H., Wieczorek, D.
<strong>Mutations in gene encoding subunits of RNA polymerases I and III cause Treacher Collins syndrome.</strong>
Nature Genet. 43: 20-22, 2011.
[PubMed: 21131976]
[Full Text: https://doi.org/10.1038/ng.724]
</p>
</li>
<li>
<p class="mim-text-font">
Schaefer, E., Collet, C., Genevieve, D., Vincent, M., Lohmann, D. R., Sanchez, E., Bolender, C., Eliot, M.-M., Nurnberg, G., Passos-Bueno, M.-R., Wieczorek, D., Van Maldergem, L., Doray, B.
<strong>Autosomal recessive POLR1D mutation with decrease of TCOF1 mRNA is responsible for Treacher Collins syndrome.</strong>
Genet. Med. 16: 720-724, 2014.
[PubMed: 24603435]
[Full Text: https://doi.org/10.1038/gim.2014.12]
</p>
</li>
<li>
<p class="mim-text-font">
Yao, Y., Yamamoto, K, Nishi, Y., Nogi, Y., Muramatsu, M.
<strong>Mouse RNA polymerase I 16-kDa subunit able to associate with 40-kDa subunit is a homolog of yeast AC19 subunit of RNA polymerases I and III.</strong>
J. Biol. Chem. 271: 32881-32885, 1996.
[PubMed: 8955128]
[Full Text: https://doi.org/10.1074/jbc.271.51.32881]
</p>
</li>
</ol>
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<span class="mim-text-font">
Ada Hamosh - updated : 10/13/2014<br>Marla J. F. O&#x27;Neill - updated : 1/28/2011
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Creation Date:
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<span class="mim-text-font">
Joanna S. Amberger : 1/28/2011
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