nih-gov/www.ncbi.nlm.nih.gov/omim/607109

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<title>
Entry
- *607109 - APOLIPOPROTEIN B mRNA-EDITING ENZYME, CATALYTIC POLYPEPTIDE-LIKE 3A; APOBEC3A
- OMIM
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<span class="h4">*607109</span>
<br />
<strong>Table of Contents</strong>
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<a href="#text"><strong>Text</strong></a>
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<li role="presentation" style="margin-left: 1em">
<a href="#cloning">Cloning and Expression</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#geneFunction">Gene Function</a>
</li>
<li role="presentation" style="margin-left: 1em">
<a href="#geneStructure">Gene Structure</a>
</li>
<li role="presentation" style="margin-left: 1em">
<a href="#mapping">Mapping</a>
</li>
<li role="presentation">
<a href="#references"><strong>References</strong></a>
</li>
<li role="presentation">
<a href="#contributors"><strong>Contributors</strong></a>
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<li role="presentation">
<a href="#creationDate"><strong>Creation Date</strong></a>
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<a href="#editHistory"><strong>Edit History</strong></a>
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<span id="mimGenomeLinksToggleTriangle" class="small mimSingletonTriangle" style="color: #337CB5">&#9658;</span> Genome
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<div><a href="https://genome.ucsc.edu/cgi-bin/hgGene?db=hg38&hgg_chrom=chr22&hgg_gene=ENST00000249116.7&hgg_start=38957609&hgg_end=38963184&hgg_type=knownGene" class="mim-tip-hint" title="UCSC Genome Bioinformatics; gene-specific structure and function information with links to other databases." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'UCSC', 'domain': 'genome.ucsc.edu'})">UCSC</a></div>
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<div><a href="https://www.ebi.ac.uk/gwas/search?query=APOBEC3A" 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>
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<div><a href="https://evs.gs.washington.edu/EVS/PopStatsServlet?searchBy=Gene+Hugo&target=APOBEC3A&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>
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<div><a href="https://www.alliancegenome.org/gene/HGNC:17343" 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>
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<div><a href="https://reactome.org/content/query?q=APOBEC3A&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>
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<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;
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<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>
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<a id="number" class="mim-anchor"></a>
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&nbsp;
</div>
<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Gene description">
<span class="text-danger"><strong>*</strong></span>
607109
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</span>
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<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
APOLIPOPROTEIN B mRNA-EDITING ENZYME, CATALYTIC POLYPEPTIDE-LIKE 3A; APOBEC3A
</span>
</h3>
</div>
<div>
<br />
</div>
<div>
<a id="alternativeTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
<div>
<h4>
<span class="mim-font">
PHORBOLIN 1
</span>
</h4>
</div>
</div>
<div>
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</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=APOBEC3A" class="mim-tip-hint" title="HUGO Gene Nomenclature Committee." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'HGNC', 'domain': 'genenames.org'})">APOBEC3A</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/22/283?start=-3&limit=10&highlight=283">22q13.1</a>
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : <a href="https://genome.ucsc.edu/cgi-bin/hgTracks?db=hg38&position=chr22:38957609-38963184&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'})">22:38,957,609-38,963,184</a> </span>
</em>
</strong>
<a href="https://www.ncbi.nlm.nih.gov/" target="_blank" class="small"> (from NCBI) </a>
</span>
</p>
</div>
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<br />
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<h4>
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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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</h4>
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<h4 href="#mimCloningFold" id="mimCloningToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimCloningToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Cloning and Expression</strong>
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</h4>
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<div id="mimCloningFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p>Phorbolins-1 and -2 are highly expressed in psoriatic lesions. Treatment of normal keratinocytes with protein kinase C (PRKC; see <a href="/entry/176960">176960</a>)-activating phorbol ester leads to the overexpression of both proteins. Using 2-dimensional gel electrophoresis, microsequence analysis, and screening of a psoriatic epidermis cDNA expression library with degenerate probes, <a href="#4" class="mim-tip-reference" title="Madsen, P., Anant, S., Rasmussen, H. H., Gromov, P., Vorum, H., Dumanski, J. P., Tommerup, N., Collins, J. E., Wright, C. L., Dunham, I., MacGinnitie, A. J., Davidson, N. O., Celis, J. E. &lt;strong&gt;Psoriasis upregulated phorbolin-1 shares structural but not functional similarity to the mRNA-editing protein apobec-1.&lt;/strong&gt; J. Invest. Derm. 113: 162-169, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10469298/&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;10469298&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.1999.00682.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="10469298">Madsen et al. (1999)</a> isolated a cDNA encoding phorbolin-1. The deduced 199-amino acid, 20-kD protein is 20% identical to APOBEC1 (<a href="/entry/600130">600130</a>) and has RNA-editing regions. However, phorbolin-1 neither complemented nor competed with APOBEC1 in RNA-editing assays. The protein also lacked cytidine deaminase (CDA; <a href="/entry/123920">123920</a>) activity. <a href="#4" class="mim-tip-reference" title="Madsen, P., Anant, S., Rasmussen, H. H., Gromov, P., Vorum, H., Dumanski, J. P., Tommerup, N., Collins, J. E., Wright, C. L., Dunham, I., MacGinnitie, A. J., Davidson, N. O., Celis, J. E. &lt;strong&gt;Psoriasis upregulated phorbolin-1 shares structural but not functional similarity to the mRNA-editing protein apobec-1.&lt;/strong&gt; J. Invest. Derm. 113: 162-169, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10469298/&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;10469298&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.1999.00682.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="10469298">Madsen et al. (1999)</a> concluded that phorbolin-1 and phorbolin-1-related protein (<a href="/entry/607110">607110</a>) do not manifest any of the functional properties ascribed to APOBEC1. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10469298" 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 RT-PCR, <a href="#1" class="mim-tip-reference" title="Bogerd, H. P., Wiegand, H. L., Hulme, A. E., Garcia-Perez, J. L., O&#x27;Shea, K. S., Moran, J. V., Cullen, B. R. &lt;strong&gt;Cellular inhibitors of long interspersed element 1 and Alu retrotransposition.&lt;/strong&gt; Proc. Nat. Acad. Sci. 103: 8780-8785, 2006.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16728505/&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;16728505&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=16728505[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/10.1073/pnas.0603313103&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="16728505">Bogerd et al. (2006)</a> found that APOBEC3A was expressed only in peripheral blood leukocytes and spleen, whereas APOBEC3B (<a href="/entry/607110">607110</a>) was expressed at low levels in a wide range of somatic tissues and in undifferentiated human embryonic stem cell lines. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16728505" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="geneFunction" class="mim-anchor"></a>
<h4 href="#mimGeneFunctionFold" id="mimGeneFunctionToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimGeneFunctionToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Gene Function</strong>
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</h4>
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<div id="mimGeneFunctionFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#1" class="mim-tip-reference" title="Bogerd, H. P., Wiegand, H. L., Hulme, A. E., Garcia-Perez, J. L., O&#x27;Shea, K. S., Moran, J. V., Cullen, B. R. &lt;strong&gt;Cellular inhibitors of long interspersed element 1 and Alu retrotransposition.&lt;/strong&gt; Proc. Nat. Acad. Sci. 103: 8780-8785, 2006.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16728505/&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;16728505&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=16728505[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/10.1073/pnas.0603313103&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="16728505">Bogerd et al. (2006)</a> found that APOBEC3A and APOBEC3B inhibited LINE-1 retrotransposition in HeLa cells. APOBEC3A and APOBEC3B also inhibited Alu mobility, which is mediated by the LINE-1 ORF2 protein. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16728505" 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>Three human APOBEC3 genes, APOBEC3A, APOBEC3B (<a href="/entry/607750">607750</a>), and APOBEC3H (<a href="/entry/610976">610976</a>), are expressed in keratinocytes and skin, leading <a href="#6" class="mim-tip-reference" title="Vartanian, J.-P., Guetard, D., Henry, M., Wain-Hobson, S. &lt;strong&gt;Evidence for editing of human papillomavirus DNA by APOBEC3 in benign and precancerous lesions.&lt;/strong&gt; Science 320: 230-233, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18403710/&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;18403710&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1126/science.1153201&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="18403710">Vartanian et al. (2008)</a> to investigate whether genetic editing of human papillomavirus DNA occurred. In a study of HPV1a plantar warts and HPV16 precancerous cervical biopsies, hyperedited HPV1a and HPV16 genomes were found. Strictly analogous results were obtained from transfection experiments with HPV plasmid DNA and the 3 nuclear-localized enzymes APOBEC3A, APOBEC3B, and APOBEC3H. Thus, <a href="#6" class="mim-tip-reference" title="Vartanian, J.-P., Guetard, D., Henry, M., Wain-Hobson, S. &lt;strong&gt;Evidence for editing of human papillomavirus DNA by APOBEC3 in benign and precancerous lesions.&lt;/strong&gt; Science 320: 230-233, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18403710/&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;18403710&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1126/science.1153201&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="18403710">Vartanian et al. (2008)</a> suggested that stochastic or transient overexpression of APOBEC3 genes may expose the genome to a broad spectrum of mutations that could influence the development of tumors. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18403710" 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="#2" class="mim-tip-reference" title="Buisson, R., Langenbucher, A., Bowen, D., Kwan, E. E., Benes, C. H., Zou, L., Lawrence, M. S. &lt;strong&gt;Passenger hotspot mutations in cancer driven by APOBEC3A and mesoscale genomic features.&lt;/strong&gt; Science 364: eaaw2872, 2019. Note: Electronic Article.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31249028/&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;31249028&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1126/science.aaw2872&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="31249028">Buisson et al. (2019)</a> examined the mutation landscape in cancer genomes and found that many recurrent cancer mutations previously designated as drivers are likely passengers. The integrated bioinformatic and biochemical analyses revealed that these passenger hotspot mutations arise from the preference of APOBEC3A for DNA stem loops. Conversely, recurrent APOBEC-signature mutations not in stem loops were enriched in well-characterized driver genes and might predict new drivers. <a href="#2" class="mim-tip-reference" title="Buisson, R., Langenbucher, A., Bowen, D., Kwan, E. E., Benes, C. H., Zou, L., Lawrence, M. S. &lt;strong&gt;Passenger hotspot mutations in cancer driven by APOBEC3A and mesoscale genomic features.&lt;/strong&gt; Science 364: eaaw2872, 2019. Note: Electronic Article.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/31249028/&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;31249028&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1126/science.aaw2872&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="31249028">Buisson et al. (2019)</a> argued that their results demonstrated that mesoscale genomic features need to be integrated into computational models aimed at identifying mutations linked to diseases. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31249028" 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 classifying diverse patterns of clustered mutagenesis in human tumor genomes, <a href="#5" class="mim-tip-reference" title="Mas-Ponte, D., Supek, F. &lt;strong&gt;DNA mismatch repair promotes APOBEC3-mediated diffuse hypermutation in human cancers.&lt;/strong&gt; Nature Genet. 52: 958-968, 2020.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/32747826/&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;32747826&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/s41588-020-0674-6&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="32747826">Mas-Ponte and Supek (2020)</a> identified a novel APOBEC3 pattern of nonrecurrent, diffuse hypermutation that they called omikli, after the Greek word meaning 'fog.' This mechanism occurred independently of focal hypermutation, or kataegis (Greek for 'thunderstorm'), and was associated with activity of the DNA mismatch-repair (MMR) pathway. DNA MMR activity provided the single-stranded DNA substrates needed by APOBEC3 and contributed to a substantial proportion of APOBEC3 mutations genomewide. Because MMR was directed toward early-replicating, gene-rich chromosomal domains, APOBEC3 mutagenesis had a high propensity to generate impactful mutations, exceeding that of other common carcinogens, such as tobacco smoke and ultraviolet exposure. The authors concluded that cells direct their DNA repair capacity toward more important genomic regions, making carcinogens that subvert DNA repair highly potent. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32747826" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<div>
<a id="geneStructure" class="mim-anchor"></a>
<h4 href="#mimGeneStructureFold" id="mimGeneStructureToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<strong>Gene Structure</strong>
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<div id="mimGeneStructureFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#3" class="mim-tip-reference" title="Jarmuz, A., Chester, A., Bayliss, J., Gisbourne, J., Dunham, I., Scott, J., Navaratnam, N. &lt;strong&gt;An anthropoid-specific locus of orphan C to U RNA-editing enzymes on chromosome 22.&lt;/strong&gt; Genomics 79: 285-296, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11863358/&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;11863358&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1006/geno.2002.6718&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="11863358">Jarmuz et al. (2002)</a> determined that the APOBEC3A gene contains 5 exons. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11863358" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
</span>
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</div>
<div>
<a id="mapping" class="mim-anchor"></a>
<h4 href="#mimMappingFold" id="mimMappingToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimMappingToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Mapping</strong>
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</h4>
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<div id="mimMappingFold" class="collapse in mimTextToggleFold">
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<p>Using FISH and cosmid analyses, <a href="#4" class="mim-tip-reference" title="Madsen, P., Anant, S., Rasmussen, H. H., Gromov, P., Vorum, H., Dumanski, J. P., Tommerup, N., Collins, J. E., Wright, C. L., Dunham, I., MacGinnitie, A. J., Davidson, N. O., Celis, J. E. &lt;strong&gt;Psoriasis upregulated phorbolin-1 shares structural but not functional similarity to the mRNA-editing protein apobec-1.&lt;/strong&gt; J. Invest. Derm. 113: 162-169, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10469298/&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;10469298&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1523-1747.1999.00682.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="10469298">Madsen et al. (1999)</a> mapped the phorbolin-1 gene to chromosome 22q13, close to the phorbolin-1-related gene and centromeric to the PDGFB gene (<a href="/entry/190040">190040</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10469298" 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 FISH and genomic sequence analysis, <a href="#3" class="mim-tip-reference" title="Jarmuz, A., Chester, A., Bayliss, J., Gisbourne, J., Dunham, I., Scott, J., Navaratnam, N. &lt;strong&gt;An anthropoid-specific locus of orphan C to U RNA-editing enzymes on chromosome 22.&lt;/strong&gt; Genomics 79: 285-296, 2002.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11863358/&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;11863358&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1006/geno.2002.6718&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="11863358">Jarmuz et al. (2002)</a> mapped the APOBEC3A gene within a tandem array of 7 APOBEC genes or pseudogenes on chromosome 22q12-q13.2. All are oriented with a centromeric 5-prime end. The authors noted that a similar expansion of the APOBEC family is not present in rodents. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11863358" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="references"class="mim-anchor"></a>
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<span class="mim-font">
<span id="mimReferencesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<strong>REFERENCES</strong>
</span>
</h4>
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</div>
<div id="mimReferencesFold" class="collapse in mimTextToggleFold">
<ol>
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<a id="1" class="mim-anchor"></a>
<a id="Bogerd2006" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Bogerd, H. P., Wiegand, H. L., Hulme, A. E., Garcia-Perez, J. L., O'Shea, K. S., Moran, J. V., Cullen, B. R.
<strong>Cellular inhibitors of long interspersed element 1 and Alu retrotransposition.</strong>
Proc. Nat. Acad. Sci. 103: 8780-8785, 2006.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/16728505/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">16728505</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=16728505[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=16728505" 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.0603313103" target="_blank">Full Text</a>]
</p>
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</li>
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<a id="2" class="mim-anchor"></a>
<a id="Buisson2019" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Buisson, R., Langenbucher, A., Bowen, D., Kwan, E. E., Benes, C. H., Zou, L., Lawrence, M. S.
<strong>Passenger hotspot mutations in cancer driven by APOBEC3A and mesoscale genomic features.</strong>
Science 364: eaaw2872, 2019. Note: Electronic Article.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/31249028/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">31249028</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=31249028" 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.aaw2872" target="_blank">Full Text</a>]
</p>
</div>
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<a id="3" class="mim-anchor"></a>
<a id="Jarmuz2002" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Jarmuz, A., Chester, A., Bayliss, J., Gisbourne, J., Dunham, I., Scott, J., Navaratnam, N.
<strong>An anthropoid-specific locus of orphan C to U RNA-editing enzymes on chromosome 22.</strong>
Genomics 79: 285-296, 2002.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11863358/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11863358</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11863358" 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.2002.6718" target="_blank">Full Text</a>]
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Madsen, P., Anant, S., Rasmussen, H. H., Gromov, P., Vorum, H., Dumanski, J. P., Tommerup, N., Collins, J. E., Wright, C. L., Dunham, I., MacGinnitie, A. J., Davidson, N. O., Celis, J. E.
<strong>Psoriasis upregulated phorbolin-1 shares structural but not functional similarity to the mRNA-editing protein apobec-1.</strong>
J. Invest. Derm. 113: 162-169, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10469298/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10469298</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10469298" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1046/j.1523-1747.1999.00682.x" target="_blank">Full Text</a>]
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Mas-Ponte, D., Supek, F.
<strong>DNA mismatch repair promotes APOBEC3-mediated diffuse hypermutation in human cancers.</strong>
Nature Genet. 52: 958-968, 2020.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/32747826/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">32747826</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=32747826" 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/s41588-020-0674-6" target="_blank">Full Text</a>]
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Vartanian, J.-P., Guetard, D., Henry, M., Wain-Hobson, S.
<strong>Evidence for editing of human papillomavirus DNA by APOBEC3 in benign and precancerous lesions.</strong>
Science 320: 230-233, 2008.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/18403710/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">18403710</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18403710" 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.1153201" target="_blank">Full Text</a>]
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Ada Hamosh - updated : 01/25/2021
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Ada Hamosh - updated : 04/08/2020<br>Ada Hamosh - updated : 5/19/2008<br>Patricia A. Hartz - updated : 7/12/2006<br>Patricia A. Hartz - updated : 5/19/2003
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mgross : 01/25/2021
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alopez : 04/08/2020<br>alopez : 05/20/2008<br>alopez : 5/20/2008<br>terry : 5/19/2008<br>mgross : 7/12/2006<br>mgross : 5/19/2003<br>mgross : 5/5/2003<br>mgross : 8/23/2002<br>mgross : 7/23/2002
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<strong>*</strong> 607109
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APOLIPOPROTEIN B mRNA-EDITING ENZYME, CATALYTIC POLYPEPTIDE-LIKE 3A; APOBEC3A
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<em>Alternative titles; symbols</em>
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PHORBOLIN 1
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<strong><em>HGNC Approved Gene Symbol: APOBEC3A</em></strong>
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<strong>
<em>
Cytogenetic location: 22q13.1
&nbsp;
Genomic coordinates <span class="small">(GRCh38)</span> : 22:38,957,609-38,963,184 </span>
</em>
</strong>
<span class="small">(from NCBI)</span>
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<strong>TEXT</strong>
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<strong>Cloning and Expression</strong>
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<p>Phorbolins-1 and -2 are highly expressed in psoriatic lesions. Treatment of normal keratinocytes with protein kinase C (PRKC; see 176960)-activating phorbol ester leads to the overexpression of both proteins. Using 2-dimensional gel electrophoresis, microsequence analysis, and screening of a psoriatic epidermis cDNA expression library with degenerate probes, Madsen et al. (1999) isolated a cDNA encoding phorbolin-1. The deduced 199-amino acid, 20-kD protein is 20% identical to APOBEC1 (600130) and has RNA-editing regions. However, phorbolin-1 neither complemented nor competed with APOBEC1 in RNA-editing assays. The protein also lacked cytidine deaminase (CDA; 123920) activity. Madsen et al. (1999) concluded that phorbolin-1 and phorbolin-1-related protein (607110) do not manifest any of the functional properties ascribed to APOBEC1. </p><p>Using RT-PCR, Bogerd et al. (2006) found that APOBEC3A was expressed only in peripheral blood leukocytes and spleen, whereas APOBEC3B (607110) was expressed at low levels in a wide range of somatic tissues and in undifferentiated human embryonic stem cell lines. </p>
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<strong>Gene Function</strong>
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<p>Bogerd et al. (2006) found that APOBEC3A and APOBEC3B inhibited LINE-1 retrotransposition in HeLa cells. APOBEC3A and APOBEC3B also inhibited Alu mobility, which is mediated by the LINE-1 ORF2 protein. </p><p>Three human APOBEC3 genes, APOBEC3A, APOBEC3B (607750), and APOBEC3H (610976), are expressed in keratinocytes and skin, leading Vartanian et al. (2008) to investigate whether genetic editing of human papillomavirus DNA occurred. In a study of HPV1a plantar warts and HPV16 precancerous cervical biopsies, hyperedited HPV1a and HPV16 genomes were found. Strictly analogous results were obtained from transfection experiments with HPV plasmid DNA and the 3 nuclear-localized enzymes APOBEC3A, APOBEC3B, and APOBEC3H. Thus, Vartanian et al. (2008) suggested that stochastic or transient overexpression of APOBEC3 genes may expose the genome to a broad spectrum of mutations that could influence the development of tumors. </p><p>Buisson et al. (2019) examined the mutation landscape in cancer genomes and found that many recurrent cancer mutations previously designated as drivers are likely passengers. The integrated bioinformatic and biochemical analyses revealed that these passenger hotspot mutations arise from the preference of APOBEC3A for DNA stem loops. Conversely, recurrent APOBEC-signature mutations not in stem loops were enriched in well-characterized driver genes and might predict new drivers. Buisson et al. (2019) argued that their results demonstrated that mesoscale genomic features need to be integrated into computational models aimed at identifying mutations linked to diseases. </p><p>By classifying diverse patterns of clustered mutagenesis in human tumor genomes, Mas-Ponte and Supek (2020) identified a novel APOBEC3 pattern of nonrecurrent, diffuse hypermutation that they called omikli, after the Greek word meaning 'fog.' This mechanism occurred independently of focal hypermutation, or kataegis (Greek for 'thunderstorm'), and was associated with activity of the DNA mismatch-repair (MMR) pathway. DNA MMR activity provided the single-stranded DNA substrates needed by APOBEC3 and contributed to a substantial proportion of APOBEC3 mutations genomewide. Because MMR was directed toward early-replicating, gene-rich chromosomal domains, APOBEC3 mutagenesis had a high propensity to generate impactful mutations, exceeding that of other common carcinogens, such as tobacco smoke and ultraviolet exposure. The authors concluded that cells direct their DNA repair capacity toward more important genomic regions, making carcinogens that subvert DNA repair highly potent. </p>
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<strong>Gene Structure</strong>
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<p>Jarmuz et al. (2002) determined that the APOBEC3A gene contains 5 exons. </p>
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<strong>Mapping</strong>
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<p>Using FISH and cosmid analyses, Madsen et al. (1999) mapped the phorbolin-1 gene to chromosome 22q13, close to the phorbolin-1-related gene and centromeric to the PDGFB gene (190040). </p><p>By FISH and genomic sequence analysis, Jarmuz et al. (2002) mapped the APOBEC3A gene within a tandem array of 7 APOBEC genes or pseudogenes on chromosome 22q12-q13.2. All are oriented with a centromeric 5-prime end. The authors noted that a similar expansion of the APOBEC family is not present in rodents. </p>
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<strong>REFERENCES</strong>
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<li>
<p class="mim-text-font">
Bogerd, H. P., Wiegand, H. L., Hulme, A. E., Garcia-Perez, J. L., O'Shea, K. S., Moran, J. V., Cullen, B. R.
<strong>Cellular inhibitors of long interspersed element 1 and Alu retrotransposition.</strong>
Proc. Nat. Acad. Sci. 103: 8780-8785, 2006.
[PubMed: 16728505]
[Full Text: https://doi.org/10.1073/pnas.0603313103]
</p>
</li>
<li>
<p class="mim-text-font">
Buisson, R., Langenbucher, A., Bowen, D., Kwan, E. E., Benes, C. H., Zou, L., Lawrence, M. S.
<strong>Passenger hotspot mutations in cancer driven by APOBEC3A and mesoscale genomic features.</strong>
Science 364: eaaw2872, 2019. Note: Electronic Article.
[PubMed: 31249028]
[Full Text: https://doi.org/10.1126/science.aaw2872]
</p>
</li>
<li>
<p class="mim-text-font">
Jarmuz, A., Chester, A., Bayliss, J., Gisbourne, J., Dunham, I., Scott, J., Navaratnam, N.
<strong>An anthropoid-specific locus of orphan C to U RNA-editing enzymes on chromosome 22.</strong>
Genomics 79: 285-296, 2002.
[PubMed: 11863358]
[Full Text: https://doi.org/10.1006/geno.2002.6718]
</p>
</li>
<li>
<p class="mim-text-font">
Madsen, P., Anant, S., Rasmussen, H. H., Gromov, P., Vorum, H., Dumanski, J. P., Tommerup, N., Collins, J. E., Wright, C. L., Dunham, I., MacGinnitie, A. J., Davidson, N. O., Celis, J. E.
<strong>Psoriasis upregulated phorbolin-1 shares structural but not functional similarity to the mRNA-editing protein apobec-1.</strong>
J. Invest. Derm. 113: 162-169, 1999.
[PubMed: 10469298]
[Full Text: https://doi.org/10.1046/j.1523-1747.1999.00682.x]
</p>
</li>
<li>
<p class="mim-text-font">
Mas-Ponte, D., Supek, F.
<strong>DNA mismatch repair promotes APOBEC3-mediated diffuse hypermutation in human cancers.</strong>
Nature Genet. 52: 958-968, 2020.
[PubMed: 32747826]
[Full Text: https://doi.org/10.1038/s41588-020-0674-6]
</p>
</li>
<li>
<p class="mim-text-font">
Vartanian, J.-P., Guetard, D., Henry, M., Wain-Hobson, S.
<strong>Evidence for editing of human papillomavirus DNA by APOBEC3 in benign and precancerous lesions.</strong>
Science 320: 230-233, 2008.
[PubMed: 18403710]
[Full Text: https://doi.org/10.1126/science.1153201]
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Ada Hamosh - updated : 01/25/2021<br>Ada Hamosh - updated : 04/08/2020<br>Ada Hamosh - updated : 5/19/2008<br>Patricia A. Hartz - updated : 7/12/2006<br>Patricia A. Hartz - updated : 5/19/2003
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