nih-gov/www.ncbi.nlm.nih.gov/omim/602618

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<title>
Entry
- *602618 - C-TERMINAL-BINDING PROTEIN 1; CTBP1
- OMIM
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<span class="h4">*602618</span>
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<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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<a href="#description">Description</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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<li role="presentation" style="margin-left: 1em">
<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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</div>
<div id="mimGenomeLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel" aria-labelledby="genome">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.ensembl.org/Homo_sapiens/Location/View?db=core;g=ENSG00000159692;t=ENST00000382952" class="mim-tip-hint" title="Genome databases for vertebrates and other eukaryotic species." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Ensembl', 'domain': 'ensembl.org'})">Ensembl</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/genome/gdv/browser/gene/?id=1487" class="mim-tip-hint" title="Detailed views of the complete genomes of selected organisms from vertebrates to protozoa." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NCBI Genome Viewer', 'domain': 'ncbi.nlm.nih.gov'})">NCBI Genome Viewer</a></div>
<div><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&hgFind=omimGeneAcc&position=602618" 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'})">UCSC Genome Browser</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="mimDna">
<span class="panel-title">
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<span id="mimDnaLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9658;</span> DNA
</a>
</span>
</span>
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<div id="mimDnaLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.ensembl.org/Homo_sapiens/Transcript/Sequence_cDNA?db=core;g=ENSG00000159692;t=ENST00000382952" class="mim-tip-hint" title="Transcript-based views for coding and noncoding DNA." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Ensembl', 'domain': 'ensembl.org'})">Ensembl (MANE Select)</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/nuccore/NM_001012614,NM_001328,NM_001377186,NM_001377187,NM_001377188,NM_001377189,NM_001377190,NM_001377191,NM_001377192,NM_001377193,XM_024453899,XM_047449633" class="mim-tip-hint" title="A collection of genome, gene, and transcript sequence data from several sources, including GenBank, RefSeq." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NCBI RefSeq', 'domain': 'ncbi.nlm.nih'})">NCBI RefSeq</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/nuccore/NM_001012614" class="mim-tip-hint" title="A collection of genome, gene, and transcript sequence data from several sources, including GenBank, RefSeq." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'NCBI RefSeq (MANE)', 'domain': 'ncbi.nlm.nih'})">NCBI RefSeq (MANE Select)</a></div>
<div><a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&hgFind=omimGeneAcc&position=602618" 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'})">UCSC Genome Browser</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="mimProtein">
<span class="panel-title">
<span class="small">
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<span id="mimProteinLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9658;</span> Protein
</a>
</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://hprd.org/summary?hprd_id=04015&isoform_id=04015_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/CTBP1" 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/3702075,4262370,4557497,6014741,15079678,31544963,47939654,57997087,61743967,63993759,68533513,119603005,119603006,119603007,119603008,608785243,608785618,608785692,608785706,608785736,608785738,608785740,1370486254,1785000292,1785000297,1785000303,1785000311,1785000331,1785000333,1785000346,1785000370,2217348959" 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/Q13363" 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>
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<div class="panel-heading mim-panel-heading" role="tab" id="mimGeneInfo">
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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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<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=1487" 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=ENSG00000159692;t=ENST00000382952" 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=CTBP1" 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=CTBP1" 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+1487" 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/CTBP1" 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:1487" 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/1487" 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=chr4&hgg_gene=ENST00000382952.8&hgg_start=1211445&hgg_end=1250355&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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&nbsp;
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<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=602618[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>
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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">
<span class="panel-title">
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<span id="mimVariationLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9660;</span> Variation
</a>
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<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=602618[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/CTBP1/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/ENSG00000159692" 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=CTBP1" 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=CTBP1" 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=CTBP1" 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=CTBP1&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/PA26995" 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>
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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:2494" 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/FBgn0020496.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:1201685" 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/CTBP1#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:1201685" 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/1487/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=1487" 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=WBGene00006424;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-010130-1" 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">
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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>
</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:1487" 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=CTBP1&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>
602618
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
C-TERMINAL-BINDING PROTEIN 1; CTBP1
</span>
</h3>
</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=CTBP1" class="mim-tip-hint" title="HUGO Gene Nomenclature Committee." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HGNC', 'domain': 'genenames.org'})">CTBP1</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/4/26?start=-3&limit=10&highlight=26">4p16.3</a>
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : <a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&position=chr4:1211445-1250355&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'})">4:1,211,445-1,250,355</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/4/26?start=-3&limit=10&highlight=26">
4p16.3
</a>
</span>
</td>
<td>
<span class="mim-font">
Hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617915"> 617915 </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>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group">
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PheneGene Graphics <span class="caret"></span>
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<li><a href="/graph/linear/602618" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/602618" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
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<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>
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<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>
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<a id="description" class="mim-anchor"></a>
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<strong>Description</strong>
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<p>The CTBP1 gene encodes a transcriptional regulator that interacts with chromatin-modifying enzymes to modulate gene expression in multiple cellular pathways. CTBP1 is thought to function mainly in transcriptional repression through recruitment of histone-modifying enzymes such as histone deacetylases and methyltransferases (summary by <a href="#1" class="mim-tip-reference" title="Beck, D. B., Cho, M. T., Millan, F., Yates, C., Hannibal, M., O&#x27;Connor, B., Shinawi, M., Connolly, A. M., Waggoner, D., Halbach, S., Angle, B., Sanders, V., Shen, Y., Retterer, K., Begtrup, A., Bai, R., Chung, W. K. &lt;strong&gt;A recurrent de novo CTBP1 mutation is associated with developmental delay, hypotonia, ataxia, and tooth enamel defects.&lt;/strong&gt; Neurogenetics 17: 173-178, 2016.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/27094857/&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;27094857&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s10048-016-0482-4&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="27094857">Beck et al., 2016</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=27094857" 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="cloning" class="mim-anchor"></a>
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<strong>Cloning and Expression</strong>
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<p>The E1a region of group C adenoviruses encodes 2 nearly identical proteins that are largely responsible for the oncogenic properties of adenoviruses. Whereas the N-terminal half of these E1A proteins is sufficient for transformation, the C-terminal half appears to modulate transformation, tumorigenesis, and metastasis negatively. <a href="#2" class="mim-tip-reference" title="Boyd, J. M., Subramanian, T., Schaeper, U., La Regina, M., Bayley, S., Chinnadurai, G. &lt;strong&gt;A region in the C-terminus of adenovirus 2/5 E1a protein is required for association with a cellular phosphoprotein and important for the negative modulation of T24-ras mediated transformation, tumorigenesis and metastasis.&lt;/strong&gt; EMBO J. 12: 469-478, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8440238/&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;8440238&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/j.1460-2075.1993.tb05679.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="8440238">Boyd et al. (1993)</a> purified a HeLa cell protein, designated CTBP1, that specifically binds to the C-terminal half of E1A proteins. CTBP1 is a phosphoprotein that migrates as a 48-kD doublet by SDS-PAGE. <a href="#8" class="mim-tip-reference" title="Katsanis, N., Fisher, E. M. C. &lt;strong&gt;A novel C-terminal binding protein (CTBP2) is closely related to CTBP1, an adenovirus E1A-binding protein, and maps to human chromosome 21q21.3.&lt;/strong&gt; Genomics 47: 294-299, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9479502/&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;9479502&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1006/geno.1997.5115&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="9479502">Katsanis and Fisher (1998)</a> suggested that the doublet consists of CTBP1 and the closely related CTBP2 (<a href="/entry/602619">602619</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?term=8440238+9479502" 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="#10" class="mim-tip-reference" title="Schaeper, U., Boyd, J. M., Verma, S., Uhlmann, E., Subramanian, T., Chinnadurai, G. &lt;strong&gt;Molecular cloning and characterization of a cellular phosphoprotein that interacts with a conserved C-terminal domain of adenovirus E1A involved in negative modulation of oncogenic transformation.&lt;/strong&gt; Proc. Nat. Acad. Sci. 92: 10467-10471, 1995. Note: Erratum: Proc. Nat. Acad. Sci. 95: 14584 only, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7479821/&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;7479821&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.92.23.10467&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="7479821">Schaeper et al. (1995)</a> independently isolated a CTBP1 cDNA from a B-cell library. The predicted 439-amino acid sequence contains the sequences of 2 peptides prepared from purified CTBP1. The authors coimmunoprecipitated CTPB1 and an E1A protein from extracts of mammalian cells that were expressing both proteins. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7479821" 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="#5" class="mim-tip-reference" title="Furusawa, T., Moribe, H., Kondoh, H., Higashi, Y. &lt;strong&gt;Identification of CtBP1 and CtBP2 as corepressors of zinc finger-homeodomain factor delta-EF1.&lt;/strong&gt; Molec. Cell. Biol. 19: 8581-8590, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10567582/&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;10567582&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10567582[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1128/MCB.19.12.8581&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="10567582">Furusawa et al. (1999)</a> identified the mouse homologs of CTBP1 and CTBP2 in a yeast 2-hybrid screen for proteins that interact with delta-EF1 (TCF8; <a href="/entry/189909">189909</a>), a transcriptional repressor that binds the E2-box (CACCTG) and related sequences. Using 2-hybrid and direct binding assays, they concluded that CtBP1 binds to the short medial portion of delta-EF1 containing the PLDLSL motif. In cotransfection experiments, they observed that CtBP1 enhanced the transrepression activity of delta-EF1. Using Northern blot analysis and in situ hybridization with mouse embryos, <a href="#5" class="mim-tip-reference" title="Furusawa, T., Moribe, H., Kondoh, H., Higashi, Y. &lt;strong&gt;Identification of CtBP1 and CtBP2 as corepressors of zinc finger-homeodomain factor delta-EF1.&lt;/strong&gt; Molec. Cell. Biol. 19: 8581-8590, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10567582/&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;10567582&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10567582[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1128/MCB.19.12.8581&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="10567582">Furusawa et al. (1999)</a> detected CtBP1 expression throughout developmental stages and in a wide range of adult tissues. CtBP1 and CtBP2 expression correlates with delta-EF1 expression. The authors hypothesized that CtBP1 and CtBP2 function as corepressors of delta-EF1 action. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10567582" 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>By PCR of a radiation hybrid panel, <a href="#8" class="mim-tip-reference" title="Katsanis, N., Fisher, E. M. C. &lt;strong&gt;A novel C-terminal binding protein (CTBP2) is closely related to CTBP1, an adenovirus E1A-binding protein, and maps to human chromosome 21q21.3.&lt;/strong&gt; Genomics 47: 294-299, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9479502/&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;9479502&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1006/geno.1997.5115&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="9479502">Katsanis and Fisher (1998)</a> mapped the CTBP1 gene to chromosome 4p16. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9479502" 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>Gene Function</strong>
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<p>Polycomb (Pc) is part of a Pc group (PcG) protein complex that is involved in repression of gene activity during Drosophila and vertebrate development. Using a yeast 2-hybrid assay, <a href="#11" class="mim-tip-reference" title="Sewalt, R. G. A. B., Gunster, M. J., van der Vlag, J., Satijn, D. P. E., Otte, A. P. &lt;strong&gt;C-terminal binding protein is a transcriptional repressor that interacts with a specific class of vertebrate polycomb proteins.&lt;/strong&gt; Molec. Cell. Biol. 19: 777-787, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9858600/&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;9858600&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=9858600[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1128/MCB.19.1.777&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="9858600">Sewalt et al. (1999)</a> found that Xenopus Ctbp1 interacts with Xenopus Pc and that human CTBP2 interacts with PC2 (<a href="/entry/603079">603079</a>), a human Pc homolog. Immunofluorescence studies indicated that CTBP1 and CTBP2 partially colocalize with PC2 in large PcG domains in interphase nuclei. As with PC2, chimeric LexA-CTBP2 and LexA-CTBP1 proteins repressed gene activity when targeted to a reporter gene. <a href="#11" class="mim-tip-reference" title="Sewalt, R. G. A. B., Gunster, M. J., van der Vlag, J., Satijn, D. P. E., Otte, A. P. &lt;strong&gt;C-terminal binding protein is a transcriptional repressor that interacts with a specific class of vertebrate polycomb proteins.&lt;/strong&gt; Molec. Cell. Biol. 19: 777-787, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9858600/&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;9858600&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=9858600[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1128/MCB.19.1.777&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="9858600">Sewalt et al. (1999)</a> suggested that PC2-mediated repression of gene expression involves an association with corepressors such as the CTBPs. They speculated that the interference of the adenoviral E1A protein with the transcription machinery of the infected cell may involve interference with PcG-mediated repression through disruption of the CTBP-PcG interaction. Northern blot analysis revealed that the CTBP1 gene was expressed as a 2.4-kb mRNA in all human tissues tested. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9858600" 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>Pc2 recruits the transcriptional corepressor CTBP to PcG bodies. <a href="#7" class="mim-tip-reference" title="Kagey, M. H., Melhuish, T. A., Wotton, D. &lt;strong&gt;The polycomb protein Pc2 is a SUMO E3.&lt;/strong&gt; Cell 113: 127-137, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12679040/&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;12679040&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0092-8674(03)00159-4&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="12679040">Kagey et al. (2003)</a> showed that CTBP is sumoylated at a single lysine. In vitro, CTBP sumoylation minimally required the SUMO E1 and E2 (UBC9; <a href="/entry/601661">601661</a>) and SUMO1 (<a href="/entry/601912">601912</a>). However, Pc2 dramatically enhanced CTBP sumoylation. The authors proposed that, in vivo, this is likely due to the ability of Pc2 to recruit both CTBP and UBC9 to PcG bodies, thereby bringing together substrate and E2 and stimulating the transfer of SUMO to CTBP. These results demonstrated that Pc2 is a SUMO E3 and suggested that PcG bodies may be sumoylation centers. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12679040" 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="Zhang, Q., Piston, D. W., Goodman, R. H. &lt;strong&gt;Regulation of corepressor function by nuclear NADH.&lt;/strong&gt; Science 295: 1895-1897, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11847309/&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;11847309&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1126/science.1069300&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="11847309">Zhang et al. (2002)</a> demonstrated that CTBP binding to cellular and viral transcriptional repressors is regulated by NAD+ and NADH, with NADH being 2 to 3 orders of magnitude more effective. Levels of free nuclear nicotinamide adenine dinucleotides, determined using 2-photon microscopy, corresponded to the levels required for half-maximal CTBP binding and were considerably lower than those previously reported. Agents capable of increasing NADH levels stimulated CTBP binding to its partners in vivo and potentiated CTBP-mediated repression. <a href="#14" class="mim-tip-reference" title="Zhang, Q., Piston, D. W., Goodman, R. H. &lt;strong&gt;Regulation of corepressor function by nuclear NADH.&lt;/strong&gt; Science 295: 1895-1897, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11847309/&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;11847309&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1126/science.1069300&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="11847309">Zhang et al. (2002)</a> proposed that this ability to detect changes in nuclear NAD+/NADH ratio allows CTBP to serve as a redox sensor for transcription. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11847309" 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="#9" class="mim-tip-reference" title="Kumar, V., Carlson, J. E. Ohgi, K. A., Edwards, T. A., Rose, D. W., Escalante, C. R., Rosenfeld, M. G., Aggarwal, A. K. &lt;strong&gt;Transcription corepressor CtBP is an NAD(+)-regulated dehydrogenase.&lt;/strong&gt; Molec. Cell 10: 857-869, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12419229/&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;12419229&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s1097-2765(02)00650-0&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="12419229">Kumar et al. (2002)</a> reported biochemical and crystallographic studies that revealed that CTBP1 is a functional dehydrogenase. In addition, both a cofactor-dependent conformational change, with NAD+ and NADH being equivalently effective, and the active site residues were linked to the binding of the PXDLS consensus recognition motif on repressors, such as E1A and RIP140 (<a href="/entry/602490">602490</a>). They concluded that CTBP1 is an NAD(+)-regulated component of critical complexes for specific repression events in cells. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12419229" 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>CTBP is recruited to DNA by transcription factors that contain a PXDLS motif. <a href="#12" class="mim-tip-reference" title="Shi, Y., Sawada, J., Sui, G., Affar, E. B., Whetstine, J. R., Lan, F., Ogawa, H., Luke, M. P.-S., Nakatani, Y., Shi, Y. &lt;strong&gt;Coordinated histone modifications mediated by a CtBP co-repressor complex.&lt;/strong&gt; Nature 422: 735-738, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12700765/&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;12700765&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/nature01550&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="12700765">Shi et al. (2003)</a> reported the identification of a CTBP complex that contains the essential components for both gene targeting and coordinated histone modifications, allowing for the effective repression of genes targeted by CTBP. This complex has a molecular mass of about 1.3 to 1.5 million and contains CTBP1 and CTBP2 as well as G9A (<a href="/entry/604599">604599</a>), EUHMT (<a href="/entry/607001">607001</a>), COREST (<a href="/entry/607675">607675</a>), HDAC1 (<a href="/entry/601241">601241</a>) and HDAC2 (<a href="/entry/605164">605164</a>), NPAO, REBB1, ZNF217 (<a href="/entry/602967">602967</a>), and KIAA0222. Immunoprecipitation with G9A antibodies brought down the same components as well as HPC2 (ELAC2; <a href="/entry/605367">605367</a>). <a href="#12" class="mim-tip-reference" title="Shi, Y., Sawada, J., Sui, G., Affar, E. B., Whetstine, J. R., Lan, F., Ogawa, H., Luke, M. P.-S., Nakatani, Y., Shi, Y. &lt;strong&gt;Coordinated histone modifications mediated by a CtBP co-repressor complex.&lt;/strong&gt; Nature 422: 735-738, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/12700765/&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;12700765&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/nature01550&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="12700765">Shi et al. (2003)</a> found that inhibiting the expression of CTBP and its associated histone-modifying activities by RNA-interference resulted in alterations of histone modifications at the promoter of the tumor invasion suppressor gene E-cadherin (<a href="/entry/192090">192090</a>) and increased promoter activity in a reporter assay. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12700765" 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>By yeast 3-hybrid analysis, <a href="#15" class="mim-tip-reference" title="Zhang, Q., Yoshimatsu, Y., Hildebrand, J., Frisch, S. M., Goodman, R. H. &lt;strong&gt;Homeodomain interacting protein kinase 2 promotes apoptosis by downregulating the transcriptional corepressor CtBP.&lt;/strong&gt; Cell 115: 177-186, 2003.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/14567915/&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;14567915&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/s0092-8674(03)00802-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="14567915">Zhang et al. (2003)</a> found that mouse Hipk2 (<a href="/entry/606868">606868</a>) interacted with an E1A-Ctbp complex. Expression of Hipk2 or exposure to ultraviolet (UV) irradiation reduced Ctbp levels via a proteasome-mediated pathway. Coexpression of kinase-inactive Hipk2 or small interfering RNA-mediated reduction in Hipk2 levels prevented the UV effect. Mutation of Ctbp ser422 prevented phosphorylation as well as UV- and Hipk2-directed Ctbp clearance. Deletion of Ctbp or reduction in Ctbp levels promoted apoptosis in p53 (<a href="/entry/191170">191170</a>)-deficient cells. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14567915" 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="#6" class="mim-tip-reference" title="Gallop, J. L., Butler, P. J. G., McMahon, H. T. &lt;strong&gt;Endophilin and CtBP/BARS are not acyl transferases in endocytosis or Golgi fission.&lt;/strong&gt; Nature 438: 675-678, 2005.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16319893/&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;16319893&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/nature04136&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="16319893">Gallop et al. (2005)</a> found that the lysophosphatidic acid acyltransferase, or LPAAT, activity associated with CtBP/BARS (e.g., <a href="#13" class="mim-tip-reference" title="Weigert, R., Silletta, M. G., Spano, S., Turacchio, G., Cericola, C., Colanzi, A., Senatore, S., Mancini, R., Polishchuk, E. V., Salmona, M., Facchiano, F., Burger, K. N. J., Mironov, A., Luini, A., Corda, D. &lt;strong&gt;CtBP/BARS induces fission of Golgi membranes by acylating lysophosphatidic acid.&lt;/strong&gt; Nature 402: 429-433, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10586885/&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;10586885&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/46587&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="10586885">Weigert et al., 1999</a>) is a copurification artifact. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=10586885+16319893" 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>Using a promoter pull-down assay followed by mass spectrometry analysis, <a href="#4" class="mim-tip-reference" title="Flajollet, S., Poras, I., Carosella, E. D., Moreau, P. &lt;strong&gt;RREB-1 is a transcriptional repressor of HLA-G.&lt;/strong&gt; J. Immun. 183: 6948-6959, 2009.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/19890057/&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;19890057&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.4049/jimmunol.0902053&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="19890057">Flajollet et al. (2009)</a> identified RREB1 (<a href="/entry/602209">602209</a>) as a protein that bound the HLA-G (<a href="/entry/142871">142871</a>) promoter. RREB1 exerted repressive activity on the promoter in HLA-G-negative cells that was mediated by recruitment of HDAC1 and CTBP1 and/or CTBP2. The HLA-G promoter contains 3 RREB1 target sites. <a href="#4" class="mim-tip-reference" title="Flajollet, S., Poras, I., Carosella, E. D., Moreau, P. &lt;strong&gt;RREB-1 is a transcriptional repressor of HLA-G.&lt;/strong&gt; J. Immun. 183: 6948-6959, 2009.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/19890057/&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;19890057&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.4049/jimmunol.0902053&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="19890057">Flajollet et al. (2009)</a> proposed that the repressive activity of RREB1 on the HLA-G promoter may be regulated by posttranslational modifications governing its association with CTBP. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=19890057" 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="Deng, Y., Deng, H., Bi, F., Liu, J., Bemis, L. T., Norris, D., Wang, X.-J., Zhang, Q. &lt;strong&gt;MicroRNA-137 targets carboxyl-terminal binding protein 1 in melanoma cell lines.&lt;/strong&gt; Int. J. Biol. Sci. 7: 133-137, 2011.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/21278922/&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;21278922&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=21278922[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.7150/ijbs.7.133&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="21278922">Deng et al. (2011)</a> identified microRNA-137 (MIR137; <a href="/entry/614304">614304</a>) as a regulator of CTBP1 expression. Expression of MIR137 was inversely correlated with that of CTBP1 in melanoma cell lines. The MIR137-binding site in the 3-prime UTR of CTBP1 mRNA is conserved from human to chicken. Pull-down assays revealed that MIR137 interacted with ARGO2 (EIF2C2; <a href="/entry/606229">606229</a>) and CTBP1 mRNA. Cotransfection of MIR137 inhibited expression of a reporter gene containing the CTBP1 3-prime UTR, but not when the MIR137-binding site was deleted from the CTBP1 3-prime UTR. Western blot and quantitative RT-PCR analyses showed that MIR137 expression in a melanoma cell line reduced CTBP1 protein levels and increased expression of the CTBP1 target genes E-cadherin and BAX (<a href="/entry/600040">600040</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21278922" 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>In 4 unrelated patients with hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome (HADDTS; <a href="/entry/617915">617915</a>), <a href="#1" class="mim-tip-reference" title="Beck, D. B., Cho, M. T., Millan, F., Yates, C., Hannibal, M., O&#x27;Connor, B., Shinawi, M., Connolly, A. M., Waggoner, D., Halbach, S., Angle, B., Sanders, V., Shen, Y., Retterer, K., Begtrup, A., Bai, R., Chung, W. K. &lt;strong&gt;A recurrent de novo CTBP1 mutation is associated with developmental delay, hypotonia, ataxia, and tooth enamel defects.&lt;/strong&gt; Neurogenetics 17: 173-178, 2016.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/27094857/&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;27094857&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s10048-016-0482-4&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="27094857">Beck et al. (2016)</a> identified a de novo heterozygous missense mutation in the CTBP1 gene (R331W; <a href="#0001">602618.0001</a>). The mutations were found by whole-exome sequencing and confirmed by Sanger sequencing. One patient was maternally somatic mosaic for the mutation; his mother, who carried a low mutation load (5.3%), had no neurologic features. Functional studies of the variant and studies of patient cells were not performed, but the authors postulated a dominant-negative effect. The patients were part of a cohort of 5,471 trios containing probands with neurodevelopmental disorders who underwent whole-exome sequencing. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=27094857" 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="/allelicVariants/602618" class="btn btn-default" role="button"> Table View </a>
&nbsp;&nbsp;<a href="https://www.ncbi.nlm.nih.gov/clinvar?term=602618[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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<strong>.0001&nbsp;HYPOTONIA, ATAXIA, DEVELOPMENTAL DELAY, AND TOOTH ENAMEL DEFECT SYNDROME</strong>
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CTBP1, ARG331TRP
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<p>In 4 unrelated patients with hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome (HADDTS; <a href="/entry/617915">617915</a>), <a href="#1" class="mim-tip-reference" title="Beck, D. B., Cho, M. T., Millan, F., Yates, C., Hannibal, M., O&#x27;Connor, B., Shinawi, M., Connolly, A. M., Waggoner, D., Halbach, S., Angle, B., Sanders, V., Shen, Y., Retterer, K., Begtrup, A., Bai, R., Chung, W. K. &lt;strong&gt;A recurrent de novo CTBP1 mutation is associated with developmental delay, hypotonia, ataxia, and tooth enamel defects.&lt;/strong&gt; Neurogenetics 17: 173-178, 2016.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/27094857/&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;27094857&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1007/s10048-016-0482-4&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="27094857">Beck et al. (2016)</a> identified a de novo heterozygous c.991C-T transition in the CTBP1 gene, resulting in an arg331-to-trp (R331W) substitution at a highly conserved residue in the PLDLS domain in the C-terminal region, which plays a role in the scaffolding function of CTBP1. The mutations were found by whole-exome sequencing and confirmed by Sanger sequencing. The R331W variant was not found in the dbSNP or ExAC databases, or in a local database of 24,578 exomes. One of the patients was maternally somatic mosaic for the mutation; his mother, who carried a low mutation load (5.3%), had no neurologic features. Functional studies of the variant and studies of patient cells were not performed, but the authors postulated a dominant-negative effect. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=27094857" 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>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Beck2016" class="mim-anchor"></a>
<div class="">
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Beck, D. B., Cho, M. T., Millan, F., Yates, C., Hannibal, M., O'Connor, B., Shinawi, M., Connolly, A. M., Waggoner, D., Halbach, S., Angle, B., Sanders, V., Shen, Y., Retterer, K., Begtrup, A., Bai, R., Chung, W. K.
<strong>A recurrent de novo CTBP1 mutation is associated with developmental delay, hypotonia, ataxia, and tooth enamel defects.</strong>
Neurogenetics 17: 173-178, 2016.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/27094857/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">27094857</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=27094857" 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/s10048-016-0482-4" target="_blank">Full Text</a>]
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<a id="Boyd1993" class="mim-anchor"></a>
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Boyd, J. M., Subramanian, T., Schaeper, U., La Regina, M., Bayley, S., Chinnadurai, G.
<strong>A region in the C-terminus of adenovirus 2/5 E1a protein is required for association with a cellular phosphoprotein and important for the negative modulation of T24-ras mediated transformation, tumorigenesis and metastasis.</strong>
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[<a href="https://doi.org/10.1002/j.1460-2075.1993.tb05679.x" target="_blank">Full Text</a>]
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<a id="Deng2011" class="mim-anchor"></a>
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Deng, Y., Deng, H., Bi, F., Liu, J., Bemis, L. T., Norris, D., Wang, X.-J., Zhang, Q.
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/21278922/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">21278922</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=21278922[PMID]&report=imagesdocsum" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Image', 'domain': 'ncbi.nlm.nih.gov'})">images</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=21278922" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.7150/ijbs.7.133" target="_blank">Full Text</a>]
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<a id="Flajollet2009" class="mim-anchor"></a>
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Flajollet, S., Poras, I., Carosella, E. D., Moreau, P.
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/19890057/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">19890057</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=19890057" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.4049/jimmunol.0902053" target="_blank">Full Text</a>]
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Furusawa, T., Moribe, H., Kondoh, H., Higashi, Y.
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10567582/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10567582</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=10567582[PMID]&report=imagesdocsum" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Image', 'domain': 'ncbi.nlm.nih.gov'})">images</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10567582" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1128/MCB.19.12.8581" target="_blank">Full Text</a>]
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<a id="Gallop2005" class="mim-anchor"></a>
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Gallop, J. L., Butler, P. J. G., McMahon, H. T.
<strong>Endophilin and CtBP/BARS are not acyl transferases in endocytosis or Golgi fission.</strong>
Nature 438: 675-678, 2005.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/16319893/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">16319893</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16319893" 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/nature04136" target="_blank">Full Text</a>]
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<a id="Kagey2003" class="mim-anchor"></a>
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Kagey, M. H., Melhuish, T. A., Wotton, D.
<strong>The polycomb protein Pc2 is a SUMO E3.</strong>
Cell 113: 127-137, 2003.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12679040/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12679040</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12679040" 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/s0092-8674(03)00159-4" target="_blank">Full Text</a>]
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<a id="Katsanis1998" class="mim-anchor"></a>
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Katsanis, N., Fisher, E. M. C.
<strong>A novel C-terminal binding protein (CTBP2) is closely related to CTBP1, an adenovirus E1A-binding protein, and maps to human chromosome 21q21.3.</strong>
Genomics 47: 294-299, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9479502/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9479502</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9479502" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1006/geno.1997.5115" target="_blank">Full Text</a>]
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<a id="Kumar2002" class="mim-anchor"></a>
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Kumar, V., Carlson, J. E. Ohgi, K. A., Edwards, T. A., Rose, D. W., Escalante, C. R., Rosenfeld, M. G., Aggarwal, A. K.
<strong>Transcription corepressor CtBP is an NAD(+)-regulated dehydrogenase.</strong>
Molec. Cell 10: 857-869, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12419229/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12419229</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12419229" 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/s1097-2765(02)00650-0" target="_blank">Full Text</a>]
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<a id="Schaeper1995" class="mim-anchor"></a>
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Schaeper, U., Boyd, J. M., Verma, S., Uhlmann, E., Subramanian, T., Chinnadurai, G.
<strong>Molecular cloning and characterization of a cellular phosphoprotein that interacts with a conserved C-terminal domain of adenovirus E1A involved in negative modulation of oncogenic transformation.</strong>
Proc. Nat. Acad. Sci. 92: 10467-10471, 1995. Note: Erratum: Proc. Nat. Acad. Sci. 95: 14584 only, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7479821/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7479821</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7479821" 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.92.23.10467" target="_blank">Full Text</a>]
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<a id="Sewalt1999" class="mim-anchor"></a>
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Sewalt, R. G. A. B., Gunster, M. J., van der Vlag, J., Satijn, D. P. E., Otte, A. P.
<strong>C-terminal binding protein is a transcriptional repressor that interacts with a specific class of vertebrate polycomb proteins.</strong>
Molec. Cell. Biol. 19: 777-787, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9858600/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9858600</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=9858600[PMID]&report=imagesdocsum" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Image', 'domain': 'ncbi.nlm.nih.gov'})">images</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9858600" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1128/MCB.19.1.777" target="_blank">Full Text</a>]
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<a id="Shi2003" class="mim-anchor"></a>
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Shi, Y., Sawada, J., Sui, G., Affar, E. B., Whetstine, J. R., Lan, F., Ogawa, H., Luke, M. P.-S., Nakatani, Y., Shi, Y.
<strong>Coordinated histone modifications mediated by a CtBP co-repressor complex.</strong>
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/12700765/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">12700765</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=12700765" 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/nature01550" target="_blank">Full Text</a>]
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<a id="Weigert1999" class="mim-anchor"></a>
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Weigert, R., Silletta, M. G., Spano, S., Turacchio, G., Cericola, C., Colanzi, A., Senatore, S., Mancini, R., Polishchuk, E. V., Salmona, M., Facchiano, F., Burger, K. N. J., Mironov, A., Luini, A., Corda, D.
<strong>CtBP/BARS induces fission of Golgi membranes by acylating lysophosphatidic acid.</strong>
Nature 402: 429-433, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10586885/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10586885</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10586885" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/46587" target="_blank">Full Text</a>]
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<a id="Zhang2002" class="mim-anchor"></a>
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Zhang, Q., Piston, D. W., Goodman, R. H.
<strong>Regulation of corepressor function by nuclear NADH.</strong>
Science 295: 1895-1897, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11847309/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11847309</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11847309" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1126/science.1069300" target="_blank">Full Text</a>]
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<a id="Zhang2003" class="mim-anchor"></a>
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Zhang, Q., Yoshimatsu, Y., Hildebrand, J., Frisch, S. M., Goodman, R. H.
<strong>Homeodomain interacting protein kinase 2 promotes apoptosis by downregulating the transcriptional corepressor CtBP.</strong>
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[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/14567915/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">14567915</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=14567915" 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/s0092-8674(03)00802-x" target="_blank">Full Text</a>]
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Cassandra L. Kniffin - updated : 03/23/2018
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Paul J. Converse - updated : 11/19/2012<br>Patricia A. Hartz - updated : 10/24/2011<br>Paul J. Converse - updated : 6/20/2006<br>Ada Hamosh - updated : 1/30/2006<br>Ada Hamosh - updated : 5/6/2003<br>Stylianos E. Antonarakis - updated : 5/2/2003<br>Stylianos E. Antonarakis - updated : 4/29/2003<br>Ada Hamosh - updated : 4/2/2002<br>Dawn Watkins-Chow - updated : 10/24/2001<br>Rebekah S. Rasooly - updated : 4/9/1999
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Creation Date:
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Rebekah S. Rasooly : 5/13/1998
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carol : 03/28/2018
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carol : 03/27/2018<br>ckniffin : 03/23/2018<br>terry : 11/28/2012<br>mgross : 11/26/2012<br>terry : 11/19/2012<br>carol : 7/19/2012<br>mgross : 10/24/2011<br>carol : 12/26/2007<br>mgross : 6/20/2006<br>alopez : 2/1/2006<br>alopez : 2/1/2006<br>terry : 1/30/2006<br>mgross : 3/9/2005<br>alopez : 7/26/2004<br>terry : 7/26/2004<br>alopez : 9/30/2003<br>alopez : 5/8/2003<br>alopez : 5/8/2003<br>terry : 5/6/2003<br>mgross : 5/2/2003<br>mgross : 5/1/2003<br>terry : 4/29/2003<br>alopez : 4/5/2002<br>alopez : 4/5/2002<br>terry : 4/2/2002<br>carol : 10/24/2001<br>mgross : 4/12/1999<br>mgross : 4/9/1999<br>mgross : 4/9/1999<br>carol : 3/16/1999<br>psherman : 5/13/1998
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<strong>*</strong> 602618
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C-TERMINAL-BINDING PROTEIN 1; CTBP1
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<strong><em>HGNC Approved Gene Symbol: CTBP1</em></strong>
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<p>
<span class="mim-text-font">
<strong>
<em>
Cytogenetic location: 4p16.3
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : 4:1,211,445-1,250,355 </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="1">
<span class="mim-font">
4p16.3
</span>
</td>
<td>
<span class="mim-font">
Hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome
</span>
</td>
<td>
<span class="mim-font">
617915
</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 CTBP1 gene encodes a transcriptional regulator that interacts with chromatin-modifying enzymes to modulate gene expression in multiple cellular pathways. CTBP1 is thought to function mainly in transcriptional repression through recruitment of histone-modifying enzymes such as histone deacetylases and methyltransferases (summary by Beck et al., 2016). </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>The E1a region of group C adenoviruses encodes 2 nearly identical proteins that are largely responsible for the oncogenic properties of adenoviruses. Whereas the N-terminal half of these E1A proteins is sufficient for transformation, the C-terminal half appears to modulate transformation, tumorigenesis, and metastasis negatively. Boyd et al. (1993) purified a HeLa cell protein, designated CTBP1, that specifically binds to the C-terminal half of E1A proteins. CTBP1 is a phosphoprotein that migrates as a 48-kD doublet by SDS-PAGE. Katsanis and Fisher (1998) suggested that the doublet consists of CTBP1 and the closely related CTBP2 (602619). </p><p>Schaeper et al. (1995) independently isolated a CTBP1 cDNA from a B-cell library. The predicted 439-amino acid sequence contains the sequences of 2 peptides prepared from purified CTBP1. The authors coimmunoprecipitated CTPB1 and an E1A protein from extracts of mammalian cells that were expressing both proteins. </p><p>Furusawa et al. (1999) identified the mouse homologs of CTBP1 and CTBP2 in a yeast 2-hybrid screen for proteins that interact with delta-EF1 (TCF8; 189909), a transcriptional repressor that binds the E2-box (CACCTG) and related sequences. Using 2-hybrid and direct binding assays, they concluded that CtBP1 binds to the short medial portion of delta-EF1 containing the PLDLSL motif. In cotransfection experiments, they observed that CtBP1 enhanced the transrepression activity of delta-EF1. Using Northern blot analysis and in situ hybridization with mouse embryos, Furusawa et al. (1999) detected CtBP1 expression throughout developmental stages and in a wide range of adult tissues. CtBP1 and CtBP2 expression correlates with delta-EF1 expression. The authors hypothesized that CtBP1 and CtBP2 function as corepressors of delta-EF1 action. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Mapping</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>By PCR of a radiation hybrid panel, Katsanis and Fisher (1998) mapped the CTBP1 gene to chromosome 4p16. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Gene Function</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Polycomb (Pc) is part of a Pc group (PcG) protein complex that is involved in repression of gene activity during Drosophila and vertebrate development. Using a yeast 2-hybrid assay, Sewalt et al. (1999) found that Xenopus Ctbp1 interacts with Xenopus Pc and that human CTBP2 interacts with PC2 (603079), a human Pc homolog. Immunofluorescence studies indicated that CTBP1 and CTBP2 partially colocalize with PC2 in large PcG domains in interphase nuclei. As with PC2, chimeric LexA-CTBP2 and LexA-CTBP1 proteins repressed gene activity when targeted to a reporter gene. Sewalt et al. (1999) suggested that PC2-mediated repression of gene expression involves an association with corepressors such as the CTBPs. They speculated that the interference of the adenoviral E1A protein with the transcription machinery of the infected cell may involve interference with PcG-mediated repression through disruption of the CTBP-PcG interaction. Northern blot analysis revealed that the CTBP1 gene was expressed as a 2.4-kb mRNA in all human tissues tested. </p><p>Pc2 recruits the transcriptional corepressor CTBP to PcG bodies. Kagey et al. (2003) showed that CTBP is sumoylated at a single lysine. In vitro, CTBP sumoylation minimally required the SUMO E1 and E2 (UBC9; 601661) and SUMO1 (601912). However, Pc2 dramatically enhanced CTBP sumoylation. The authors proposed that, in vivo, this is likely due to the ability of Pc2 to recruit both CTBP and UBC9 to PcG bodies, thereby bringing together substrate and E2 and stimulating the transfer of SUMO to CTBP. These results demonstrated that Pc2 is a SUMO E3 and suggested that PcG bodies may be sumoylation centers. </p><p>Zhang et al. (2002) demonstrated that CTBP binding to cellular and viral transcriptional repressors is regulated by NAD+ and NADH, with NADH being 2 to 3 orders of magnitude more effective. Levels of free nuclear nicotinamide adenine dinucleotides, determined using 2-photon microscopy, corresponded to the levels required for half-maximal CTBP binding and were considerably lower than those previously reported. Agents capable of increasing NADH levels stimulated CTBP binding to its partners in vivo and potentiated CTBP-mediated repression. Zhang et al. (2002) proposed that this ability to detect changes in nuclear NAD+/NADH ratio allows CTBP to serve as a redox sensor for transcription. </p><p>Kumar et al. (2002) reported biochemical and crystallographic studies that revealed that CTBP1 is a functional dehydrogenase. In addition, both a cofactor-dependent conformational change, with NAD+ and NADH being equivalently effective, and the active site residues were linked to the binding of the PXDLS consensus recognition motif on repressors, such as E1A and RIP140 (602490). They concluded that CTBP1 is an NAD(+)-regulated component of critical complexes for specific repression events in cells. </p><p>CTBP is recruited to DNA by transcription factors that contain a PXDLS motif. Shi et al. (2003) reported the identification of a CTBP complex that contains the essential components for both gene targeting and coordinated histone modifications, allowing for the effective repression of genes targeted by CTBP. This complex has a molecular mass of about 1.3 to 1.5 million and contains CTBP1 and CTBP2 as well as G9A (604599), EUHMT (607001), COREST (607675), HDAC1 (601241) and HDAC2 (605164), NPAO, REBB1, ZNF217 (602967), and KIAA0222. Immunoprecipitation with G9A antibodies brought down the same components as well as HPC2 (ELAC2; 605367). Shi et al. (2003) found that inhibiting the expression of CTBP and its associated histone-modifying activities by RNA-interference resulted in alterations of histone modifications at the promoter of the tumor invasion suppressor gene E-cadherin (192090) and increased promoter activity in a reporter assay. </p><p>By yeast 3-hybrid analysis, Zhang et al. (2003) found that mouse Hipk2 (606868) interacted with an E1A-Ctbp complex. Expression of Hipk2 or exposure to ultraviolet (UV) irradiation reduced Ctbp levels via a proteasome-mediated pathway. Coexpression of kinase-inactive Hipk2 or small interfering RNA-mediated reduction in Hipk2 levels prevented the UV effect. Mutation of Ctbp ser422 prevented phosphorylation as well as UV- and Hipk2-directed Ctbp clearance. Deletion of Ctbp or reduction in Ctbp levels promoted apoptosis in p53 (191170)-deficient cells. </p><p>Gallop et al. (2005) found that the lysophosphatidic acid acyltransferase, or LPAAT, activity associated with CtBP/BARS (e.g., Weigert et al., 1999) is a copurification artifact. </p><p>Using a promoter pull-down assay followed by mass spectrometry analysis, Flajollet et al. (2009) identified RREB1 (602209) as a protein that bound the HLA-G (142871) promoter. RREB1 exerted repressive activity on the promoter in HLA-G-negative cells that was mediated by recruitment of HDAC1 and CTBP1 and/or CTBP2. The HLA-G promoter contains 3 RREB1 target sites. Flajollet et al. (2009) proposed that the repressive activity of RREB1 on the HLA-G promoter may be regulated by posttranslational modifications governing its association with CTBP. </p><p>Deng et al. (2011) identified microRNA-137 (MIR137; 614304) as a regulator of CTBP1 expression. Expression of MIR137 was inversely correlated with that of CTBP1 in melanoma cell lines. The MIR137-binding site in the 3-prime UTR of CTBP1 mRNA is conserved from human to chicken. Pull-down assays revealed that MIR137 interacted with ARGO2 (EIF2C2; 606229) and CTBP1 mRNA. Cotransfection of MIR137 inhibited expression of a reporter gene containing the CTBP1 3-prime UTR, but not when the MIR137-binding site was deleted from the CTBP1 3-prime UTR. Western blot and quantitative RT-PCR analyses showed that MIR137 expression in a melanoma cell line reduced CTBP1 protein levels and increased expression of the CTBP1 target genes E-cadherin and BAX (600040). </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 4 unrelated patients with hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome (HADDTS; 617915), Beck et al. (2016) identified a de novo heterozygous missense mutation in the CTBP1 gene (R331W; 602618.0001). The mutations were found by whole-exome sequencing and confirmed by Sanger sequencing. One patient was maternally somatic mosaic for the mutation; his mother, who carried a low mutation load (5.3%), had no neurologic features. Functional studies of the variant and studies of patient cells were not performed, but the authors postulated a dominant-negative effect. The patients were part of a cohort of 5,471 trios containing probands with neurodevelopmental disorders who underwent whole-exome sequencing. </p>
</span>
<div>
<br />
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>ALLELIC VARIANTS</strong>
</span>
<strong>1 Selected Example):</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<div>
<h4>
<span class="mim-font">
<strong>.0001 &nbsp; HYPOTONIA, ATAXIA, DEVELOPMENTAL DELAY, AND TOOTH ENAMEL DEFECT SYNDROME</strong>
</span>
</h4>
</div>
<div>
<span class="mim-text-font">
CTBP1, ARG331TRP
<br />
SNP: rs869320802,
ClinVar: RCV000211044, RCV000595812, RCV000624918
</span>
</div>
<div>
<span class="mim-text-font">
<p>In 4 unrelated patients with hypotonia, ataxia, developmental delay, and tooth enamel defect syndrome (HADDTS; 617915), Beck et al. (2016) identified a de novo heterozygous c.991C-T transition in the CTBP1 gene, resulting in an arg331-to-trp (R331W) substitution at a highly conserved residue in the PLDLS domain in the C-terminal region, which plays a role in the scaffolding function of CTBP1. The mutations were found by whole-exome sequencing and confirmed by Sanger sequencing. The R331W variant was not found in the dbSNP or ExAC databases, or in a local database of 24,578 exomes. One of the patients was maternally somatic mosaic for the mutation; his mother, who carried a low mutation load (5.3%), had no neurologic features. Functional studies of the variant and studies of patient cells were not performed, but the authors postulated a dominant-negative 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">
Beck, D. B., Cho, M. T., Millan, F., Yates, C., Hannibal, M., O'Connor, B., Shinawi, M., Connolly, A. M., Waggoner, D., Halbach, S., Angle, B., Sanders, V., Shen, Y., Retterer, K., Begtrup, A., Bai, R., Chung, W. K.
<strong>A recurrent de novo CTBP1 mutation is associated with developmental delay, hypotonia, ataxia, and tooth enamel defects.</strong>
Neurogenetics 17: 173-178, 2016.
[PubMed: 27094857]
[Full Text: https://doi.org/10.1007/s10048-016-0482-4]
</p>
</li>
<li>
<p class="mim-text-font">
Boyd, J. M., Subramanian, T., Schaeper, U., La Regina, M., Bayley, S., Chinnadurai, G.
<strong>A region in the C-terminus of adenovirus 2/5 E1a protein is required for association with a cellular phosphoprotein and important for the negative modulation of T24-ras mediated transformation, tumorigenesis and metastasis.</strong>
EMBO J. 12: 469-478, 1993.
[PubMed: 8440238]
[Full Text: https://doi.org/10.1002/j.1460-2075.1993.tb05679.x]
</p>
</li>
<li>
<p class="mim-text-font">
Deng, Y., Deng, H., Bi, F., Liu, J., Bemis, L. T., Norris, D., Wang, X.-J., Zhang, Q.
<strong>MicroRNA-137 targets carboxyl-terminal binding protein 1 in melanoma cell lines.</strong>
Int. J. Biol. Sci. 7: 133-137, 2011.
[PubMed: 21278922]
[Full Text: https://doi.org/10.7150/ijbs.7.133]
</p>
</li>
<li>
<p class="mim-text-font">
Flajollet, S., Poras, I., Carosella, E. D., Moreau, P.
<strong>RREB-1 is a transcriptional repressor of HLA-G.</strong>
J. Immun. 183: 6948-6959, 2009.
[PubMed: 19890057]
[Full Text: https://doi.org/10.4049/jimmunol.0902053]
</p>
</li>
<li>
<p class="mim-text-font">
Furusawa, T., Moribe, H., Kondoh, H., Higashi, Y.
<strong>Identification of CtBP1 and CtBP2 as corepressors of zinc finger-homeodomain factor delta-EF1.</strong>
Molec. Cell. Biol. 19: 8581-8590, 1999.
[PubMed: 10567582]
[Full Text: https://doi.org/10.1128/MCB.19.12.8581]
</p>
</li>
<li>
<p class="mim-text-font">
Gallop, J. L., Butler, P. J. G., McMahon, H. T.
<strong>Endophilin and CtBP/BARS are not acyl transferases in endocytosis or Golgi fission.</strong>
Nature 438: 675-678, 2005.
[PubMed: 16319893]
[Full Text: https://doi.org/10.1038/nature04136]
</p>
</li>
<li>
<p class="mim-text-font">
Kagey, M. H., Melhuish, T. A., Wotton, D.
<strong>The polycomb protein Pc2 is a SUMO E3.</strong>
Cell 113: 127-137, 2003.
[PubMed: 12679040]
[Full Text: https://doi.org/10.1016/s0092-8674(03)00159-4]
</p>
</li>
<li>
<p class="mim-text-font">
Katsanis, N., Fisher, E. M. C.
<strong>A novel C-terminal binding protein (CTBP2) is closely related to CTBP1, an adenovirus E1A-binding protein, and maps to human chromosome 21q21.3.</strong>
Genomics 47: 294-299, 1998.
[PubMed: 9479502]
[Full Text: https://doi.org/10.1006/geno.1997.5115]
</p>
</li>
<li>
<p class="mim-text-font">
Kumar, V., Carlson, J. E. Ohgi, K. A., Edwards, T. A., Rose, D. W., Escalante, C. R., Rosenfeld, M. G., Aggarwal, A. K.
<strong>Transcription corepressor CtBP is an NAD(+)-regulated dehydrogenase.</strong>
Molec. Cell 10: 857-869, 2002.
[PubMed: 12419229]
[Full Text: https://doi.org/10.1016/s1097-2765(02)00650-0]
</p>
</li>
<li>
<p class="mim-text-font">
Schaeper, U., Boyd, J. M., Verma, S., Uhlmann, E., Subramanian, T., Chinnadurai, G.
<strong>Molecular cloning and characterization of a cellular phosphoprotein that interacts with a conserved C-terminal domain of adenovirus E1A involved in negative modulation of oncogenic transformation.</strong>
Proc. Nat. Acad. Sci. 92: 10467-10471, 1995. Note: Erratum: Proc. Nat. Acad. Sci. 95: 14584 only, 1998.
[PubMed: 7479821]
[Full Text: https://doi.org/10.1073/pnas.92.23.10467]
</p>
</li>
<li>
<p class="mim-text-font">
Sewalt, R. G. A. B., Gunster, M. J., van der Vlag, J., Satijn, D. P. E., Otte, A. P.
<strong>C-terminal binding protein is a transcriptional repressor that interacts with a specific class of vertebrate polycomb proteins.</strong>
Molec. Cell. Biol. 19: 777-787, 1999.
[PubMed: 9858600]
[Full Text: https://doi.org/10.1128/MCB.19.1.777]
</p>
</li>
<li>
<p class="mim-text-font">
Shi, Y., Sawada, J., Sui, G., Affar, E. B., Whetstine, J. R., Lan, F., Ogawa, H., Luke, M. P.-S., Nakatani, Y., Shi, Y.
<strong>Coordinated histone modifications mediated by a CtBP co-repressor complex.</strong>
Nature 422: 735-738, 2003.
[PubMed: 12700765]
[Full Text: https://doi.org/10.1038/nature01550]
</p>
</li>
<li>
<p class="mim-text-font">
Weigert, R., Silletta, M. G., Spano, S., Turacchio, G., Cericola, C., Colanzi, A., Senatore, S., Mancini, R., Polishchuk, E. V., Salmona, M., Facchiano, F., Burger, K. N. J., Mironov, A., Luini, A., Corda, D.
<strong>CtBP/BARS induces fission of Golgi membranes by acylating lysophosphatidic acid.</strong>
Nature 402: 429-433, 1999.
[PubMed: 10586885]
[Full Text: https://doi.org/10.1038/46587]
</p>
</li>
<li>
<p class="mim-text-font">
Zhang, Q., Piston, D. W., Goodman, R. H.
<strong>Regulation of corepressor function by nuclear NADH.</strong>
Science 295: 1895-1897, 2002.
[PubMed: 11847309]
[Full Text: https://doi.org/10.1126/science.1069300]
</p>
</li>
<li>
<p class="mim-text-font">
Zhang, Q., Yoshimatsu, Y., Hildebrand, J., Frisch, S. M., Goodman, R. H.
<strong>Homeodomain interacting protein kinase 2 promotes apoptosis by downregulating the transcriptional corepressor CtBP.</strong>
Cell 115: 177-186, 2003.
[PubMed: 14567915]
[Full Text: https://doi.org/10.1016/s0092-8674(03)00802-x]
</p>
</li>
</ol>
<div>
<br />
</div>
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Contributors:
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</div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
Cassandra L. Kniffin - updated : 03/23/2018<br>Paul J. Converse - updated : 11/19/2012<br>Patricia A. Hartz - updated : 10/24/2011<br>Paul J. Converse - updated : 6/20/2006<br>Ada Hamosh - updated : 1/30/2006<br>Ada Hamosh - updated : 5/6/2003<br>Stylianos E. Antonarakis - updated : 5/2/2003<br>Stylianos E. Antonarakis - updated : 4/29/2003<br>Ada Hamosh - updated : 4/2/2002<br>Dawn Watkins-Chow - updated : 10/24/2001<br>Rebekah S. Rasooly - updated : 4/9/1999
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<div class="col-lg-1 col-md-1 col-sm-2 col-xs-2">
<span class="text-nowrap mim-text-font">
Creation Date:
</span>
</div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
Rebekah S. Rasooly : 5/13/1998
</span>
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<div class="modal-footer">
<button type="button" id="mimDonationPopupDonate" class="btn btn-success btn-block" data-dismiss="modal"> Donate To OMIM! </button>
</div>
</div>
</div>
</div>
</div>
</body>
</html>