nih-gov/www.ncbi.nlm.nih.gov/omim/604326

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<title>
Entry
- #604326 - SPINOCEREBELLAR ATAXIA 12; SCA12
- OMIM
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<span class="h4">#604326</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="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<a href="/clinicalSynopsis/604326"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS164400"> <strong>Phenotypic Series</strong> </a>
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<a href="#text"><strong>Text</strong></a>
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<a href="#clinicalFeatures">Clinical Features</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#molecularGenetics">Molecular Genetics</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#populationGenetics">Population Genetics</a>
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<a href="#references"><strong>References</strong></a>
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<a href="#contributors"><strong>Contributors</strong></a>
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<a href="#creationDate"><strong>Creation Date</strong></a>
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</div>
<div id="mimClinicalResourcesLinksFold" class="panel-collapse collapse in mimLinksFold" role="tabpanel" aria-labelledby="clinicalResources">
<div class="panel-body small mim-panel-body">
<div><a href="https://clinicaltrials.gov/search?cond=(SPINOCEREBELLAR ATAXIA) OR (PPP2R2B)" class="mim-tip-hint" title="Clinical Trials" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/ClinicalLabs_Search_Simple.php?lng=EN&LnkId=13779&Typ=Pat" class="mim-tip-hint" title="A list of European laboratories that offer genetic testing." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'EuroGentest', 'domain': 'orpha.net'})">EuroGentest</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/books/NBK1138/" class="mim-tip-hint" title="Expert-authored, peer-reviewed descriptions of inherited disorders including the uses of genetic testing in diagnosis, management, and genetic counseling." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Gene Reviews', 'domain': 'ncbi.nlm.nih.gov'})">Gene Reviews</a></div>
<div><a href="https://www.diseaseinfosearch.org/x/6746" class="mim-tip-hint" title="Network of disease-specific advocacy organizations, universities, private companies, government agencies, and public policy organizations." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Genetic Alliance', 'domain': 'diseaseinfosearch.org'})">Genetic Alliance</a></div>
<div><a href="https://www.ncbi.nlm.nih.gov/gtr/all/tests/?term=604326[mim]" class="mim-tip-hint" title="Genetic Testing Registry." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'GTR', 'domain': 'ncbi.nlm.nih.gov'})">GTR</a></div>
<div><a href="https://www.orpha.net/consor/cgi-bin/OC_Exp.php?lng=EN&Expert=98762" class="mim-tip-hint" title="European reference portal for information on rare diseases and orphan drugs." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'OrphaNet', 'domain': 'orpha.net'})">OrphaNet</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="mimAnimalModels">
<span class="panel-title">
<span class="small">
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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>
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</div>
<div id="mimAnimalModelsLinksFold" class="panel-collapse collapse mimLinksFold" role="tabpanel">
<div class="panel-body small mim-panel-body">
<div><a href="https://www.alliancegenome.org/disease/DOID:0050962" 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="http://www.informatics.jax.org/disease/604326" class="mim-tip-hint" title="Phenotypes, alleles, and disease models from Mouse Genome Informatics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'MGI Mouse Phenotype', 'domain': 'informatics.jax.org'})">MGI Mouse Phenotype</a></div>
<div><a href="https://wormbase.org/resources/disease/DOID:0050962" 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': 'Wormbase Disease Ontology', 'domain': 'wormbase.org'})">Wormbase Disease Ontology</a></div>
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<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;
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</div>
<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>SNOMEDCT:</strong> 719208005<br />
<strong>ORPHA:</strong> 98762<br />
<strong>DO:</strong> 0050962<br />
">ICD+</a>
</div>
<div>
<span class="h3">
<span class="mim-font mim-tip-hint" title="Phenotype description, molecular basis known">
<span class="text-danger"><strong>#</strong></span>
604326
</span>
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<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
SPINOCEREBELLAR ATAXIA 12; SCA12
</span>
</h3>
</div>
<div>
<br />
</div>
</div>
<div>
<a id="phenotypeMap" class="mim-anchor"></a>
<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
</span>
</h4>
<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>
<th>
Gene/Locus
</th>
<th>
Gene/Locus <br /> MIM number
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/633?start=-3&limit=10&highlight=633">
5q32
</a>
</span>
</td>
<td>
<span class="mim-font">
Spinocerebellar ataxia 12
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604326"> 604326 </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>
<td>
<span class="mim-font">
PPP2R2B
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604325"> 604325 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
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<a href="/clinicalSynopsis/604326" class="btn btn-warning" role="button"> Clinical Synopsis </a>
<button type="button" id="mimPhenotypicSeriesToggle" class="btn btn-warning dropdown-toggle mimSingletonFoldToggle" data-toggle="collapse" href="#mimClinicalSynopsisFold" onclick="ga('send', 'event', 'Unfurl', 'ClinicalSynopsis', 'omim.org')">
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&nbsp;
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<a href="/phenotypicSeries/PS164400" class="btn btn-info" role="button"> Phenotypic Series </a>
<button type="button" id="mimPhenotypicSeriesToggle" class="btn btn-info dropdown-toggle mimSingletonFoldToggle" data-toggle="collapse" href="#mimPhenotypicSeriesFold" onclick="ga('send', 'event', 'Unfurl', 'PhenotypicSeries', 'omim.org')">
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PheneGene Graphics <span class="caret"></span>
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<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/604326" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/604326" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Radial'})"> Radial </a></li>
</ul>
</div>
<span class="glyphicon glyphicon-question-sign mim-tip-hint" title="OMIM PheneGene graphics depict relationships between phenotypes, groups of related phenotypes (Phenotypic Series), and genes.<br /><a href='/static/omim/pdf/OMIM_Graphics.pdf' target='_blank'>A quick reference overview and guide (PDF)</a>"></span>
<div>
<p />
</div>
<div id="mimClinicalSynopsisFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small" style="margin: 5px">
<div>
<div>
<span class="h5 mim-font">
<strong> INHERITANCE </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Autosomal dominant <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/263681008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">263681008</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/771269000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">771269000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0443147&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0443147</a>, <a href="https://bioportal.bioontology.org/search?q=C1867440&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1867440</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000006</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000006</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> HEAD & NECK </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Face </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Facial myokymia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1070000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1070000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/G51.4" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G51.4</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0270871&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0270871</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000317" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000317</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000317" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000317</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Eyes </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Ocular movement abnormalities <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/103252009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">103252009</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0497202&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0497202</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000496" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000496</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000496" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000496</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> NEUROLOGIC </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Central Nervous System </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Progressive cerebellar ataxia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/230233000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">230233000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0393525&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0393525</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002073" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002073</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002073" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002073</a>]</span><br /> -
Upper extremity action tremor <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3148817&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3148817</a>]</span><br /> -
Head tremor <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0239882&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0239882</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002346" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002346</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002346" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002346</a>]</span><br /> -
Dysarthria <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/8011004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">8011004</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/438.13" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">438.13</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/784.51" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">784.51</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0013362&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0013362</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001260" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001260</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001260" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001260</a>]</span><br /> -
Dysmetria <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/32566006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">32566006</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234162&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234162</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001310" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001310</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001310" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001310</a>]</span><br /> -
Dysdiadochokinesis <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/23133003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">23133003</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234979&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234979</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002075" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002075</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002075" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002075</a>]</span><br /> -
Hyperreflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/86854008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">86854008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0151889&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151889</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001347" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001347</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001347" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001347</a>]</span><br /> -
Parkinsonism <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/32798002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">32798002</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/G20.C" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G20.C</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0242422&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0242422</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001300" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001300</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001300" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001300</a>]</span><br /> -
Axial dystonia <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1836149&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1836149</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002530" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002530</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002530" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002530</a>]</span><br /> -
Dementia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/52448006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">52448006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/12348006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">12348006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/F03.90" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F03.90</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/F03" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F03</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/290.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">290.1</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/294.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">294.2</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/290" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">290</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0011265&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0011265</a>, <a href="https://bioportal.bioontology.org/search?q=C0497327&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0497327</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000726" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000726</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000726" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000726</a>]</span><br /> -
Cortical atrophy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/278849000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">278849000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4551583&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4551583</a>, <a href="https://bioportal.bioontology.org/search?q=C0235946&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0235946</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002120" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002120</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0002059" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002059</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002120" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002120</a>]</span><br /> -
Cerebellar atrophy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0740279&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0740279</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001272" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001272</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001272" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001272</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Peripheral Nervous System </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Subclinical sensory or sensorimotor neuropathy <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3148818&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3148818</a>]</span><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Behavioral Psychiatric Manifestations </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Depression <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/78667006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">78667006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/35489007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">35489007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/366979004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">366979004</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/255339005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">255339005</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/F34.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F34.1</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/F32.A" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F32.A</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/F33.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F33.9</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0812393&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0812393</a>, <a href="https://bioportal.bioontology.org/search?q=C0011581&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0011581</a>, <a href="https://bioportal.bioontology.org/search?q=C0460137&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0460137</a>, <a href="https://bioportal.bioontology.org/search?q=C1579931&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1579931</a>, <a href="https://bioportal.bioontology.org/search?q=C0344315&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0344315</a>, <a href="https://bioportal.bioontology.org/search?q=C4085311&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4085311</a>, <a href="https://bioportal.bioontology.org/search?q=C0011570&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0011570</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000716" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000716</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000716" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000716</a>]</span><br /> -
Anxiety <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/48694002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">48694002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/197480006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">197480006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/F41.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F41.9</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/F41.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F41.1</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0003469&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0003469</a>, <a href="https://bioportal.bioontology.org/search?q=C0003467&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0003467</a>, <a href="https://bioportal.bioontology.org/search?q=C0860603&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0860603</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000739" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000739</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000739" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000739</a>]</span><br /> -
Delusions <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/2073000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">2073000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0011253&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0011253</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000746" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000746</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000746" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000746</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MISCELLANEOUS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Age at onset 8 to 55 years (mean 40 years)<br /> -
Normal CAG repeat length is 7 to 32 triplets<br /> -
Pathogenic CAG repeat length is 51 to 78 triplets<br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> MOLECULAR BASIS </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Caused by expanded CAG trinucleotide repeats in the beta subunit of the protein phosphatase 2 gene (PPP2R2B, <a href="/entry/604325#0001">604325.0001</a>)<br />
</span>
</div>
</div>
</div>
<div class="text-right">
<a href="#mimClinicalSynopsisFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
</div>
</div>
</div>
<div id="mimPhenotypicSeriesFold" class="well well-sm collapse mimSingletonToggleFold">
<div class="small">
<div class="row">
<div class="col-lg-12 col-md-12 col-sm-12 col-xs-12">
<h5>
Spinocerebellar ataxia
- <a href="/phenotypicSeries/PS164400">PS164400</a>
- 49 Entries
</h5>
</div>
</div>
<div class="row" style="margin-left: 0.125em; margin-right: 0.125em;">
<table class="table table-bordered table-condensed table-hover mim-table-padding">
<thead>
<tr>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Location</strong>
</th>
<th class="col-lg-5 col-md-5 col-sm-5 col-xs-6 text-nowrap">
<strong>Phenotype</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Inheritance</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Phenotype<br />mapping key</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Phenotype<br />MIM number</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Gene/Locus</strong>
</th>
<th class="col-lg-1 col-md-1 col-sm-1 col-xs-1 text-nowrap">
<strong>Gene/Locus<br />MIM number</strong>
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/49?start=-3&limit=10&highlight=49"> 1p36.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607454"> Spinocerebellar ataxia 21 </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>
<td>
<span class="mim-font">
<a href="/entry/607454"> 607454 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616101"> TMEM240 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616101"> 616101 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/378?start=-3&limit=10&highlight=378"> 1p35.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617931"> Spinocerebellar ataxia 47 </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>
<td>
<span class="mim-font">
<a href="/entry/617931"> 617931 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607204"> PUM1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607204"> 607204 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/654?start=-3&limit=10&highlight=654"> 1p32.2-p32.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615945"> Spinocerebellar ataxia 37 </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>
<td>
<span class="mim-font">
<a href="/entry/615945"> 615945 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603448"> DAB1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603448"> 603448 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/1/920?start=-3&limit=10&highlight=920"> 1p13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607346"> Spinocerebellar ataxia 19 </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>
<td>
<span class="mim-font">
<a href="/entry/607346"> 607346 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605411"> KCND3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605411"> 605411 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/269?start=-3&limit=10&highlight=269"> 2p16.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608703"> Spinocerebellar ataxia 25 </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>
<td>
<span class="mim-font">
<a href="/entry/608703"> 608703 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610316"> PNPT1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610316"> 610316 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/17?start=-3&limit=10&highlight=17"> 3p26.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/606658"> Spinocerebellar ataxia 15 </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>
<td>
<span class="mim-font">
<a href="/entry/606658"> 606658 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/147265"> ITPR1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/147265"> 147265 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/17?start=-3&limit=10&highlight=17"> 3p26.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/117360"> Spinocerebellar ataxia 29, congenital nonprogressive </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>
<td>
<span class="mim-font">
<a href="/entry/117360"> 117360 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/147265"> ITPR1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/147265"> 147265 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/436?start=-3&limit=10&highlight=436"> 3p14.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/164500"> Spinocerebellar ataxia 7 </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>
<td>
<span class="mim-font">
<a href="/entry/164500"> 164500 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607640"> ATXN7 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607640"> 607640 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/799?start=-3&limit=10&highlight=799"> 3q25.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617018"> ?Spinocerebellar ataxia 43 </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>
<td>
<span class="mim-font">
<a href="/entry/617018"> 617018 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/120520"> MME </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/120520"> 120520 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/531?start=-3&limit=10&highlight=531"> 4q27 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616410"> ?Spinocerebellar ataxia 41 </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>
<td>
<span class="mim-font">
<a href="/entry/616410"> 616410 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602345"> TRPC3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602345"> 602345 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/691?start=-3&limit=10&highlight=691"> 4q34.3-q35.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613371"> ?Spinocerebellar ataxia 30 </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="2 - The disorder was placed on the map by statistical methods"> 2 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613371"> 613371 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613371"> SCA30 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613371"> 613371 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/633?start=-3&limit=10&highlight=633"> 5q32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604326"> Spinocerebellar ataxia 12 </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>
<td>
<span class="mim-font">
<a href="/entry/604326"> 604326 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604325"> PPP2R2B </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604325"> 604325 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/687?start=-3&limit=10&highlight=687"> 5q33.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617769"> Spinocerebellar ataxia 45 </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>
<td>
<span class="mim-font">
<a href="/entry/617769"> 617769 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604269"> FAT2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604269"> 604269 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/90?start=-3&limit=10&highlight=90"> 6p22.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/164400"> Spinocerebellar ataxia 1 </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>
<td>
<span class="mim-font">
<a href="/entry/164400"> 164400 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601556"> ATXN1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601556"> 601556 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/600?start=-3&limit=10&highlight=600"> 6p12.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615957"> Spinocerebellar ataxia 38 </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>
<td>
<span class="mim-font">
<a href="/entry/615957"> 615957 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611805"> ELOVL5 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611805"> 611805 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/667?start=-3&limit=10&highlight=667"> 6q14.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/133190"> Spinocerebellar ataxia 34 </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>
<td>
<span class="mim-font">
<a href="/entry/133190"> 133190 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605512"> ELOVL4 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605512"> 605512 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/928?start=-3&limit=10&highlight=928"> 6q24.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617691"> Spinocerebellar ataxia 44 </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>
<td>
<span class="mim-font">
<a href="/entry/617691"> 617691 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604473"> GRM1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604473"> 604473 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/1041?start=-3&limit=10&highlight=1041"> 6q27 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607136"> Spinocerebellar ataxia 17 </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>
<td>
<span class="mim-font">
<a href="/entry/607136"> 607136 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600075"> TBP </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600075"> 600075 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/414?start=-3&limit=10&highlight=414"> 7q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619806"> ?Spinocerebellar ataxia 49 </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>
<td>
<span class="mim-font">
<a href="/entry/619806"> 619806 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611170"> SAMD9L </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611170"> 611170 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/454?start=-3&limit=10&highlight=454"> 7q22-q32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607458"> Spinocerebellar ataxia 18 </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="2 - The disorder was placed on the map by statistical methods"> 2 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607458"> 607458 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607458"> SCA18 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607458"> 607458 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/642?start=-3&limit=10&highlight=642"> 7q32-q33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613909"> Spinocerebellar ataxia 32 </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="2 - The disorder was placed on the map by statistical methods"> 2 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613909"> 613909 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613909"> SCA32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613909"> 613909 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/380?start=-3&limit=10&highlight=380"> 11q12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608687"> Spinocerebellar ataxia 20 </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="4 - A contiguous gene duplication or deletion syndrome in which multiple genes are involved"> 4 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608687"> 608687 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608687"> SCA20 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608687"> 608687 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/646?start=-3&limit=10&highlight=646"> 11q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600224"> Spinocerebellar ataxia 5 </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>
<td>
<span class="mim-font">
<a href="/entry/600224"> 600224 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604985"> SPTBN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604985"> 604985 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/813?start=-3&limit=10&highlight=813"> 12q24.12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/183090"> Spinocerebellar ataxia 2 </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>
<td>
<span class="mim-font">
<a href="/entry/183090"> 183090 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601517"> ATXN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601517"> 601517 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/813?start=-3&limit=10&highlight=813"> 12q24.12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/183090"> {Amyotrophic lateral sclerosis, susceptibility to, 13} </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>
<td>
<span class="mim-font">
<a href="/entry/183090"> 183090 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601517"> ATXN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601517"> 601517 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/13/204?start=-3&limit=10&highlight=204"> 13q21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608768"> Spinocerebellar ataxia 8 </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>
<td>
<span class="mim-font">
<a href="/entry/608768"> 608768 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613289"> ATXN8 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613289"> 613289 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/13/213?start=-3&limit=10&highlight=213"> 13q21.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608768"> Spinocerebellar ataxia 8 </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>
<td>
<span class="mim-font">
<a href="/entry/608768"> 608768 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603680"> ATXN8OS </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603680"> 603680 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/13/293?start=-3&limit=10&highlight=293"> 13q33.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620174"> Spinocerebellar ataxia 27B, late-onset </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>
<td>
<span class="mim-font">
<a href="/entry/620174"> 620174 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601515"> FGF14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601515"> 601515 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/13/293?start=-3&limit=10&highlight=293"> 13q33.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/193003"> Spinocerebellar ataxia 27A </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>
<td>
<span class="mim-font">
<a href="/entry/193003"> 193003 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601515"> FGF14 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601515"> 601515 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/460?start=-3&limit=10&highlight=460"> 14q32.11-q32.12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616053"> ?Spinocerebellar ataxia 40 </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>
<td>
<span class="mim-font">
<a href="/entry/616053"> 616053 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611204"> CCDC88C </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611204"> 611204 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/466?start=-3&limit=10&highlight=466"> 14q32.12 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/109150"> Machado-Joseph disease </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>
<td>
<span class="mim-font">
<a href="/entry/109150"> 109150 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607047"> ATXN3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607047"> 607047 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/15/139?start=-3&limit=10&highlight=139"> 15q15.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604432"> Spinocerebellar ataxia 11 </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>
<td>
<span class="mim-font">
<a href="/entry/604432"> 604432 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611695"> TTBK2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611695"> 611695 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/37?start=-3&limit=10&highlight=37"> 16p13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618093"> Spinocerebellar ataxia 48 </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>
<td>
<span class="mim-font">
<a href="/entry/618093"> 618093 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607207"> STUB1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607207"> 607207 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/510?start=-3&limit=10&highlight=510"> 16q21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/117210"> Spinocerebellar ataxia 31 </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>
<td>
<span class="mim-font">
<a href="/entry/117210"> 117210 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612051"> BEAN1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612051"> 612051 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/561?start=-3&limit=10&highlight=561"> 16q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620947"> Spinocerebellar ataxia 51 </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>
<td>
<span class="mim-font">
<a href="/entry/620947"> 620947 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609119"> THAP11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609119"> 609119 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/630?start=-3&limit=10&highlight=630"> 16q22.2-q22.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/600223"> Spinocerebellar ataxia 4 </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>
<td>
<span class="mim-font">
<a href="/entry/600223"> 600223 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/104155"> ZFHX3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/104155"> 104155 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/747?start=-3&limit=10&highlight=747"> 17q21.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616795"> Spinocerebellar ataxia 42 </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>
<td>
<span class="mim-font">
<a href="/entry/616795"> 616795 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604065"> CACNA1G </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604065"> 604065 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/1021?start=-3&limit=10&highlight=1021"> 17q25.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/620158"> Spinocerebellar ataxia 50 </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>
<td>
<span class="mim-font">
<a href="/entry/620158"> 620158 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602367"> NPTX1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602367"> 602367 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/18/63?start=-3&limit=10&highlight=63"> 18p11.21 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610246"> Spinocerebellar ataxia 28 </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>
<td>
<span class="mim-font">
<a href="/entry/610246"> 610246 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604581"> AFG3L2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604581"> 604581 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/123?start=-3&limit=10&highlight=123"> 19p13.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609306"> ?Spinocerebellar ataxia 26 </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>
<td>
<span class="mim-font">
<a href="/entry/609306"> 609306 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/130610"> EEF2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/130610"> 130610 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/355?start=-3&limit=10&highlight=355"> 19p13.13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/183086"> Spinocerebellar ataxia 6 </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>
<td>
<span class="mim-font">
<a href="/entry/183086"> 183086 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601011"> CACNA1A </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601011"> 601011 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/700?start=-3&limit=10&highlight=700"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617770"> ?Spinocerebellar ataxia 46 </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>
<td>
<span class="mim-font">
<a href="/entry/617770"> 617770 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615698"> PLD3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615698"> 615698 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/978?start=-3&limit=10&highlight=978"> 19q13.33 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605259"> Spinocerebellar ataxia 13 </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>
<td>
<span class="mim-font">
<a href="/entry/605259"> 605259 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/176264"> KCNC3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/176264"> 176264 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/1111?start=-3&limit=10&highlight=1111"> 19q13.42 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/605361"> Spinocerebellar ataxia 14 </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>
<td>
<span class="mim-font">
<a href="/entry/605361"> 605361 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/176980"> PRKCG </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/176980"> 176980 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/20/29?start=-3&limit=10&highlight=29"> 20p13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610245"> Spinocerebellar ataxia 23 </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>
<td>
<span class="mim-font">
<a href="/entry/610245"> 610245 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131340"> PDYN </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/131340"> 131340 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/20/32?start=-3&limit=10&highlight=32"> 20p13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613908"> Spinocerebellar ataxia 35 </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>
<td>
<span class="mim-font">
<a href="/entry/613908"> 613908 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613900"> TGM6 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613900"> 613900 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/20/35?start=-3&limit=10&highlight=35"> 20p13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614153"> Spinocerebellar ataxia 36 </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>
<td>
<span class="mim-font">
<a href="/entry/614153"> 614153 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614154"> NOP56 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614154"> 614154 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/22/380?start=-3&limit=10&highlight=380"> 22q13.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/603516"> Spinocerebellar ataxia 10 </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>
<td>
<span class="mim-font">
<a href="/entry/603516"> 603516 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611150"> ATXN10 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611150"> 611150 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
Not Mapped
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612876"> Spinocerebellar ataxia 9 </a>
</span>
</td>
<td>
<span class="mim-font">
</span>
</td>
<td>
<span class="mim-font">
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612876"> 612876 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612876"> SCA9 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612876"> 612876 </a>
</span>
</td>
</tr>
</tbody>
</table>
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<a href="#mimPhenotypicSeriesFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because spinocerebellar ataxia-12 (SCA12) is caused by a heterozygous expansion of a CAG repeat in a brain-specific regulatory subunit of the protein phosphatase PP2A (PPP2R2B; <a href="/entry/604325">604325</a>) on chromosome 5q32.</p><p>Normal alleles carry 7 to 32 triplets, whereas disease alleles carry 51 to 78 triplets (<a href="#1" class="mim-tip-reference" title="Bahl, S., Virdi, K., Mittal, U., Sachdeva, M. P., Kalla, A. K., Holmes, S. E., O&#x27;Hearn, E., Margolis, R. L., Jain, S., Srivastava, A. K., Mukerji, M. &lt;strong&gt;Evidence of a common founder for SCA12 in the Indian population.&lt;/strong&gt; Ann. Hum. Genet. 69: 528-534, 2005.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16138911/&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;16138911&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1529-8817.2005.00173.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="16138911">Bahl et al., 2005</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16138911" 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>For a general discussion of autosomal dominant spinocerebellar ataxia, see SCA1 (<a href="/entry/164400">164400</a>).</p>
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<p><a href="#4" class="mim-tip-reference" title="Holmes, S. E., O&#x27;Hearn, E. E., McInnis, M. G., Gorelick-Feldman, D. A., Kleiderlein, J. J., Callahan, C., Kwak, N. G., Ingersoll-Ashworth, R. G., Sherr, M., Sumner, A. J., Sharp, A. H., Ananth, U., Seltzer, W. K., Boss, M. A., Vieria-Saecker, A.-M., Epplen, J. T., Riess, O., Ross, C. A., Margolis, R. L. &lt;strong&gt;Expansion of a novel CAG trinucleotide repeat in the 5-prime region of PPP2R2B is associated with SCA12. (Letter)&lt;/strong&gt; Nature Genet. 23: 391-392, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10581021/&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;10581021&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/70493&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="10581021">Holmes et al. (1999)</a> identified a novel form of autosomal dominant spinocerebellar ataxia (SCA), termed SCA12, in a large pedigree, 'R,' of German descent. The phenotype was variable, but the prototypic phenotype was that of a classic spinocerebellar ataxia, and the disease resembled the spinocerebellar ataxias more closely than any other form of neurodegenerative disorder. Age of onset ranged from 8 to 55 years. Most individuals presented in the fourth decade with upper extremity tremor, progressing over several decades to include head tremor, gait ataxia, dysmetria, dysdiadokinesis, hyperreflexia, paucity of movement, abnormal eye movements, and, in the oldest subjects, dementia. MRI or CT scans of 5 cases indicated both cortical and cerebellar atrophy. <a href="#5" class="mim-tip-reference" title="O&#x27;Hearn, E., Holmes, S. E., Calvert, P. C., Ross, C. A., Margolis, R. L. &lt;strong&gt;SCA-12: tremor with cerebellar and cortical atrophy is associated with a CAG repeat expansion.&lt;/strong&gt; Neurology 56: 299-303, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11171892/&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;11171892&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1212/wnl.56.3.299&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="11171892">O'Hearn et al. (2001)</a> further characterized the phenotype of the 'R' pedigree and found that action tremor of the head and arms was the most distinguishing feature in comparison to other dominant SCAs. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=10581021+11171892" 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="#1" class="mim-tip-reference" title="Bahl, S., Virdi, K., Mittal, U., Sachdeva, M. P., Kalla, A. K., Holmes, S. E., O&#x27;Hearn, E., Margolis, R. L., Jain, S., Srivastava, A. K., Mukerji, M. &lt;strong&gt;Evidence of a common founder for SCA12 in the Indian population.&lt;/strong&gt; Ann. Hum. Genet. 69: 528-534, 2005.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16138911/&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;16138911&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1529-8817.2005.00173.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="16138911">Bahl et al. (2005)</a> reported 25 patients from 20 Indian families with SCA12 who were all members of an endogamous group with origins in the state of Haryana in northern India. Five of the families had been previously reported by <a href="#7" class="mim-tip-reference" title="Srivastava, A. K., Choudhry, S., Gopinath, M. S., Roy, S., Tripathi, M., Brahmachari, S. K., Jain, S. &lt;strong&gt;Molecular and clinical correlation in five Indian families with spinocerebellar ataxia 12.&lt;/strong&gt; Ann. Neurol. 50: 796-800, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11761478/&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;11761478&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ana.10048&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="11761478">Srivastava et al. (2001)</a>. Age at onset ranged from 26 to 56 years (mean of 40.2 years), and most presented with upper extremity tremor. Other features included hyperreflexia, dysarthria, and mild or no gait ataxia. Two individuals had axial dystonia, and 3 had facial myokymia. Almost half of patients had a subclinical sensory or sensorimotor neuropathy. Brain MRI or CT scan showed cerebellar and cerebral cortical atrophy. Anticipation was not observed. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=16138911+11761478" 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>The transmission pattern of SCA12 in the family reported by <a href="#4" class="mim-tip-reference" title="Holmes, S. E., O&#x27;Hearn, E. E., McInnis, M. G., Gorelick-Feldman, D. A., Kleiderlein, J. J., Callahan, C., Kwak, N. G., Ingersoll-Ashworth, R. G., Sherr, M., Sumner, A. J., Sharp, A. H., Ananth, U., Seltzer, W. K., Boss, M. A., Vieria-Saecker, A.-M., Epplen, J. T., Riess, O., Ross, C. A., Margolis, R. L. &lt;strong&gt;Expansion of a novel CAG trinucleotide repeat in the 5-prime region of PPP2R2B is associated with SCA12. (Letter)&lt;/strong&gt; Nature Genet. 23: 391-392, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10581021/&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;10581021&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/70493&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="10581021">Holmes et al. (1999)</a> was consistent with autosomal dominant inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10581021" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p><a href="#4" class="mim-tip-reference" title="Holmes, S. E., O&#x27;Hearn, E. E., McInnis, M. G., Gorelick-Feldman, D. A., Kleiderlein, J. J., Callahan, C., Kwak, N. G., Ingersoll-Ashworth, R. G., Sherr, M., Sumner, A. J., Sharp, A. H., Ananth, U., Seltzer, W. K., Boss, M. A., Vieria-Saecker, A.-M., Epplen, J. T., Riess, O., Ross, C. A., Margolis, R. L. &lt;strong&gt;Expansion of a novel CAG trinucleotide repeat in the 5-prime region of PPP2R2B is associated with SCA12. (Letter)&lt;/strong&gt; Nature Genet. 23: 391-392, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10581021/&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;10581021&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/70493&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="10581021">Holmes et al. (1999)</a> used repeat expansion detection (RED), as described by <a href="#6" class="mim-tip-reference" title="Schalling, M., Hudson, T. J., Buetow, K. H., Housman, D. E. &lt;strong&gt;Direct detection of novel expanded trinucleotide repeats in the human genome.&lt;/strong&gt; Nature Genet. 4: 135-139, 1993.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8348150/&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;8348150&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng0693-135&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="8348150">Schalling et al. (1993)</a>, to identify an expanded CAG repeat in the PPP2R2B gene (<a href="/entry/604325#0001">604325.0001</a>) in the proband and other affected family members with SCA12. Using PCR analysis, they demonstrated that the expression was not 1 of 8 CAG repeats associated with a neurodegenerative disease or 1 of 3 CAG repeats known to undergo nonpathogenic expansion. From the proband, they cloned a 2.5-kb genomic clone that contained a repeat of 93 uninterrupted CAGs. There was no apparent correlation between repeat size and age of onset, although the range of expanded alleles was relatively narrow (66 to 78 repeats) and the precise age of onset of tremor, typically the first symptom, was difficult to define in this disorder. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=10581021+8348150" 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="#4" class="mim-tip-reference" title="Holmes, S. E., O&#x27;Hearn, E. E., McInnis, M. G., Gorelick-Feldman, D. A., Kleiderlein, J. J., Callahan, C., Kwak, N. G., Ingersoll-Ashworth, R. G., Sherr, M., Sumner, A. J., Sharp, A. H., Ananth, U., Seltzer, W. K., Boss, M. A., Vieria-Saecker, A.-M., Epplen, J. T., Riess, O., Ross, C. A., Margolis, R. L. &lt;strong&gt;Expansion of a novel CAG trinucleotide repeat in the 5-prime region of PPP2R2B is associated with SCA12. (Letter)&lt;/strong&gt; Nature Genet. 23: 391-392, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10581021/&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;10581021&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/70493&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="10581021">Holmes et al. (1999)</a> assessed the PPP2R2B CAG repeat length in 394 unrelated neurologically normal individuals and 1,099 individuals with neurologic diseases; no expansion was detected, suggesting that SCA12 is rare. The CAG tract lies 133 nucleotides upstream of the reported transcription start site of the PPP2R2B gene (<a href="/entry/604325">604325</a>), encoding a brain-specific regulatory subunit of the protein phosphatase PP2A. The PPP2R2B gene had been mapped to 5q31-q33 between markers D5S436 and D5S470. Although the possibility that the CAG tract may lie within an unidentified gene overlapping or adjacent to PPP2R2B, an antibody probe did not detect polyglutamine expansions in protein derived from lymphoblastoid cell lines of affected family members. A lod score of 4.61 at theta = 0.0 was obtained for linkage between the expanded repeat and the disorder. It was possible that the expansion was in linkage disequilibrium with a second, as-yet-unidentified, causative mutation. However, the correlation between repeat expansion and disease in pedigree R, the lack of expansions in controls, and the known capacity of expansion mutations outside of protein-coding regions to cause disease indicated that the expansion was causative. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10581021" 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 a study of 145 families with autosomal dominant cerebellar ataxia (ADCA), <a href="#3" class="mim-tip-reference" title="Fujigasaki, H., Verma, I. C., Camuzat, A., Margolis, R. L., Zander, C., Lebre, A.-S., Jamot, L., Saxena, R., Anand, I., Holmes, S. E., Ross, C. A., Durr, A., Brice, A. &lt;strong&gt;SCA12 is a rare locus for autosomal dominant cerebellar ataxia: a study of an Indian family.&lt;/strong&gt; Ann. Neurol. 49: 117-121, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11198281/&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;11198281&lt;/a&gt;]" pmid="11198281">Fujigasaki et al. (2001)</a> identified a family from India in which 6 affected and 3 unaffected members had an expanded CAG repeat in the PPP2R2B gene (<a href="/entry/604325#0001">604325.0001</a>). They determined the distribution of normal PPP2R2B repeat length in 157 French and 100 Indian control subjects. In the French population normal alleles contained 9 to 18 CAG triplets, most frequently 10. In the Indian population, lengths of up to 45 CAG triplets were observed, but the most common allele also carried 10 triplets. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11198281" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Among 293 individuals with ADCA from 77 Indian families, <a href="#7" class="mim-tip-reference" title="Srivastava, A. K., Choudhry, S., Gopinath, M. S., Roy, S., Tripathi, M., Brahmachari, S. K., Jain, S. &lt;strong&gt;Molecular and clinical correlation in five Indian families with spinocerebellar ataxia 12.&lt;/strong&gt; Ann. Neurol. 50: 796-800, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11761478/&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;11761478&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ana.10048&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="11761478">Srivastava et al. (2001)</a> found an expanded SCA12 repeat in 6 patients and 3 asymptomatic at-risk individuals from 5 families, which accounted for 7% of the ADCA cases. The expanded allele length ranged from 55 to 69 repeat units. Notable clinical features included age of onset from 26 to 50 years, initial presentation of hand tremor, lack of dementia, and evidence of a subclinical sensory and motor neuropathy. Of the 77 families, SCA1 (<a href="/entry/164400">164400</a>) mutation was found in 15.6%, SCA2 (<a href="/entry/183090">183090</a>) in 24.7%, and SCA3 (<a href="/entry/109150">109150</a>) and SCA7 (<a href="/entry/164500">164500</a>) in 2.6% each. SCA6 (<a href="/entry/183086">183086</a>), SCA8 (<a href="/entry/603680">603680</a>), and DRPLA (<a href="/entry/607462">607462</a>) mutations were not found. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11761478" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In an ataxia clinic in California, <a href="#2" class="mim-tip-reference" title="Cholfin, J. A., Sobrido, M.-J., Perlman, S., Pulst, S. M., Geschwind, D. H. &lt;strong&gt;The SCA12 mutation as a rare cause of spinocerebellar ataxia.&lt;/strong&gt; Arch. Neurol. 58: 1833-1835, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11708992/&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;11708992&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1001/archneur.58.11.1833&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="11708992">Cholfin et al. (2001)</a> screened 180 kindreds for the SCA12 mutation. The patients were of highly diverse ethnic origins. None was found to carry the SCA12 expansion. The authors concluded that the SCA12 mutation is a rare cause of spinocerebellar degeneration but that it should be considered in patients with an atypical clinical phenotype, especially when tremor is initially present. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11708992" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>Among 20 families from northern India with SCA12, <a href="#1" class="mim-tip-reference" title="Bahl, S., Virdi, K., Mittal, U., Sachdeva, M. P., Kalla, A. K., Holmes, S. E., O&#x27;Hearn, E., Margolis, R. L., Jain, S., Srivastava, A. K., Mukerji, M. &lt;strong&gt;Evidence of a common founder for SCA12 in the Indian population.&lt;/strong&gt; Ann. Hum. Genet. 69: 528-534, 2005.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16138911/&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;16138911&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1529-8817.2005.00173.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="16138911">Bahl et al. (2005)</a> identified expanded CAG repeats ranging from 51 to 69 triplets. Unaffected individuals had repeats ranging from 8 to 23 triplets. Of note, 1 asymptomatic individual was homozygous for an expanded repeat (52 and 59 triplets). Haplotype analysis identified 1 haplotype that was associated with the disease alleles, indicating a common founder. <a href="#1" class="mim-tip-reference" title="Bahl, S., Virdi, K., Mittal, U., Sachdeva, M. P., Kalla, A. K., Holmes, S. E., O&#x27;Hearn, E., Margolis, R. L., Jain, S., Srivastava, A. K., Mukerji, M. &lt;strong&gt;Evidence of a common founder for SCA12 in the Indian population.&lt;/strong&gt; Ann. Hum. Genet. 69: 528-534, 2005.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16138911/&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;16138911&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1046/j.1529-8817.2005.00173.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="16138911">Bahl et al. (2005)</a> estimated that SCA12 accounts for about 16% of all ADCA cases in northern India. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16138911" 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="Bahl2005" class="mim-anchor"></a>
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Bahl, S., Virdi, K., Mittal, U., Sachdeva, M. P., Kalla, A. K., Holmes, S. E., O'Hearn, E., Margolis, R. L., Jain, S., Srivastava, A. K., Mukerji, M.
<strong>Evidence of a common founder for SCA12 in the Indian population.</strong>
Ann. Hum. Genet. 69: 528-534, 2005.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/16138911/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">16138911</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16138911" 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.1529-8817.2005.00173.x" target="_blank">Full Text</a>]
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<a id="Cholfin2001" class="mim-anchor"></a>
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Cholfin, J. A., Sobrido, M.-J., Perlman, S., Pulst, S. M., Geschwind, D. H.
<strong>The SCA12 mutation as a rare cause of spinocerebellar ataxia.</strong>
Arch. Neurol. 58: 1833-1835, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11708992/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11708992</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11708992" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1001/archneur.58.11.1833" target="_blank">Full Text</a>]
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<a id="Fujigasaki2001" class="mim-anchor"></a>
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Fujigasaki, H., Verma, I. C., Camuzat, A., Margolis, R. L., Zander, C., Lebre, A.-S., Jamot, L., Saxena, R., Anand, I., Holmes, S. E., Ross, C. A., Durr, A., Brice, A.
<strong>SCA12 is a rare locus for autosomal dominant cerebellar ataxia: a study of an Indian family.</strong>
Ann. Neurol. 49: 117-121, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11198281/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11198281</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11198281" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
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<a id="Holmes1999" class="mim-anchor"></a>
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Holmes, S. E., O'Hearn, E. E., McInnis, M. G., Gorelick-Feldman, D. A., Kleiderlein, J. J., Callahan, C., Kwak, N. G., Ingersoll-Ashworth, R. G., Sherr, M., Sumner, A. J., Sharp, A. H., Ananth, U., Seltzer, W. K., Boss, M. A., Vieria-Saecker, A.-M., Epplen, J. T., Riess, O., Ross, C. A., Margolis, R. L.
<strong>Expansion of a novel CAG trinucleotide repeat in the 5-prime region of PPP2R2B is associated with SCA12. (Letter)</strong>
Nature Genet. 23: 391-392, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10581021/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10581021</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10581021" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1038/70493" target="_blank">Full Text</a>]
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<a id="O&#x27;Hearn2001" class="mim-anchor"></a>
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O'Hearn, E., Holmes, S. E., Calvert, P. C., Ross, C. A., Margolis, R. L.
<strong>SCA-12: tremor with cerebellar and cortical atrophy is associated with a CAG repeat expansion.</strong>
Neurology 56: 299-303, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11171892/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11171892</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11171892" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1212/wnl.56.3.299" target="_blank">Full Text</a>]
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Schalling, M., Hudson, T. J., Buetow, K. H., Housman, D. E.
<strong>Direct detection of novel expanded trinucleotide repeats in the human genome.</strong>
Nature Genet. 4: 135-139, 1993.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8348150/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8348150</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8348150" 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/ng0693-135" target="_blank">Full Text</a>]
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<a id="Srivastava2001" class="mim-anchor"></a>
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Srivastava, A. K., Choudhry, S., Gopinath, M. S., Roy, S., Tripathi, M., Brahmachari, S. K., Jain, S.
<strong>Molecular and clinical correlation in five Indian families with spinocerebellar ataxia 12.</strong>
Ann. Neurol. 50: 796-800, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11761478/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11761478</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11761478" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/ana.10048" target="_blank">Full Text</a>]
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Cassandra L. Kniffin - updated : 3/30/2010
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Cassandra L. Kniffin - updated : 10/28/2002<br>Victor A. McKusick - updated : 2/22/2002<br>Victor A. McKusick - updated : 12/21/2001<br>Kathryn R. Wagner - updated : 8/2/2001
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Victor A. McKusick : 11/30/1999
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carol : 02/08/2024
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carol : 08/17/2016<br>alopez : 09/22/2011<br>wwang : 8/4/2010<br>wwang : 4/6/2010<br>ckniffin : 3/30/2010<br>ckniffin : 3/30/2010<br>wwang : 4/23/2008<br>carol : 1/24/2003<br>carol : 11/13/2002<br>ckniffin : 10/28/2002<br>ckniffin : 8/7/2002<br>carol : 3/11/2002<br>cwells : 3/5/2002<br>terry : 2/22/2002<br>cwells : 1/10/2002<br>cwells : 1/2/2002<br>terry : 12/21/2001<br>carol : 8/2/2001<br>joanna : 1/19/2001<br>alopez : 12/7/1999<br>alopez : 12/1/1999<br>alopez : 11/30/1999
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<strong>#</strong> 604326
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SPINOCEREBELLAR ATAXIA 12; SCA12
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<strong>SNOMEDCT:</strong> 719208005; &nbsp;
<strong>ORPHA:</strong> 98762; &nbsp;
<strong>DO:</strong> 0050962; &nbsp;
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<strong>Phenotype-Gene Relationships</strong>
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Location
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Phenotype
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Phenotype <br /> MIM number
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Inheritance
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Phenotype <br /> mapping key
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Gene/Locus
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5q32
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Spinocerebellar ataxia 12
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604326
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Autosomal dominant
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3
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PPP2R2B
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604325
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because spinocerebellar ataxia-12 (SCA12) is caused by a heterozygous expansion of a CAG repeat in a brain-specific regulatory subunit of the protein phosphatase PP2A (PPP2R2B; 604325) on chromosome 5q32.</p><p>Normal alleles carry 7 to 32 triplets, whereas disease alleles carry 51 to 78 triplets (Bahl et al., 2005). </p><p>For a general discussion of autosomal dominant spinocerebellar ataxia, see SCA1 (164400).</p>
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<strong>Clinical Features</strong>
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<p>Holmes et al. (1999) identified a novel form of autosomal dominant spinocerebellar ataxia (SCA), termed SCA12, in a large pedigree, 'R,' of German descent. The phenotype was variable, but the prototypic phenotype was that of a classic spinocerebellar ataxia, and the disease resembled the spinocerebellar ataxias more closely than any other form of neurodegenerative disorder. Age of onset ranged from 8 to 55 years. Most individuals presented in the fourth decade with upper extremity tremor, progressing over several decades to include head tremor, gait ataxia, dysmetria, dysdiadokinesis, hyperreflexia, paucity of movement, abnormal eye movements, and, in the oldest subjects, dementia. MRI or CT scans of 5 cases indicated both cortical and cerebellar atrophy. O'Hearn et al. (2001) further characterized the phenotype of the 'R' pedigree and found that action tremor of the head and arms was the most distinguishing feature in comparison to other dominant SCAs. </p><p>Bahl et al. (2005) reported 25 patients from 20 Indian families with SCA12 who were all members of an endogamous group with origins in the state of Haryana in northern India. Five of the families had been previously reported by Srivastava et al. (2001). Age at onset ranged from 26 to 56 years (mean of 40.2 years), and most presented with upper extremity tremor. Other features included hyperreflexia, dysarthria, and mild or no gait ataxia. Two individuals had axial dystonia, and 3 had facial myokymia. Almost half of patients had a subclinical sensory or sensorimotor neuropathy. Brain MRI or CT scan showed cerebellar and cerebral cortical atrophy. Anticipation was not observed. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of SCA12 in the family reported by Holmes et al. (1999) was consistent with autosomal dominant inheritance. </p>
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<strong>Molecular Genetics</strong>
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<p>Holmes et al. (1999) used repeat expansion detection (RED), as described by Schalling et al. (1993), to identify an expanded CAG repeat in the PPP2R2B gene (604325.0001) in the proband and other affected family members with SCA12. Using PCR analysis, they demonstrated that the expression was not 1 of 8 CAG repeats associated with a neurodegenerative disease or 1 of 3 CAG repeats known to undergo nonpathogenic expansion. From the proband, they cloned a 2.5-kb genomic clone that contained a repeat of 93 uninterrupted CAGs. There was no apparent correlation between repeat size and age of onset, although the range of expanded alleles was relatively narrow (66 to 78 repeats) and the precise age of onset of tremor, typically the first symptom, was difficult to define in this disorder. </p><p>Holmes et al. (1999) assessed the PPP2R2B CAG repeat length in 394 unrelated neurologically normal individuals and 1,099 individuals with neurologic diseases; no expansion was detected, suggesting that SCA12 is rare. The CAG tract lies 133 nucleotides upstream of the reported transcription start site of the PPP2R2B gene (604325), encoding a brain-specific regulatory subunit of the protein phosphatase PP2A. The PPP2R2B gene had been mapped to 5q31-q33 between markers D5S436 and D5S470. Although the possibility that the CAG tract may lie within an unidentified gene overlapping or adjacent to PPP2R2B, an antibody probe did not detect polyglutamine expansions in protein derived from lymphoblastoid cell lines of affected family members. A lod score of 4.61 at theta = 0.0 was obtained for linkage between the expanded repeat and the disorder. It was possible that the expansion was in linkage disequilibrium with a second, as-yet-unidentified, causative mutation. However, the correlation between repeat expansion and disease in pedigree R, the lack of expansions in controls, and the known capacity of expansion mutations outside of protein-coding regions to cause disease indicated that the expansion was causative. </p>
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<strong>Population Genetics</strong>
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<p>In a study of 145 families with autosomal dominant cerebellar ataxia (ADCA), Fujigasaki et al. (2001) identified a family from India in which 6 affected and 3 unaffected members had an expanded CAG repeat in the PPP2R2B gene (604325.0001). They determined the distribution of normal PPP2R2B repeat length in 157 French and 100 Indian control subjects. In the French population normal alleles contained 9 to 18 CAG triplets, most frequently 10. In the Indian population, lengths of up to 45 CAG triplets were observed, but the most common allele also carried 10 triplets. </p><p>Among 293 individuals with ADCA from 77 Indian families, Srivastava et al. (2001) found an expanded SCA12 repeat in 6 patients and 3 asymptomatic at-risk individuals from 5 families, which accounted for 7% of the ADCA cases. The expanded allele length ranged from 55 to 69 repeat units. Notable clinical features included age of onset from 26 to 50 years, initial presentation of hand tremor, lack of dementia, and evidence of a subclinical sensory and motor neuropathy. Of the 77 families, SCA1 (164400) mutation was found in 15.6%, SCA2 (183090) in 24.7%, and SCA3 (109150) and SCA7 (164500) in 2.6% each. SCA6 (183086), SCA8 (603680), and DRPLA (607462) mutations were not found. </p><p>In an ataxia clinic in California, Cholfin et al. (2001) screened 180 kindreds for the SCA12 mutation. The patients were of highly diverse ethnic origins. None was found to carry the SCA12 expansion. The authors concluded that the SCA12 mutation is a rare cause of spinocerebellar degeneration but that it should be considered in patients with an atypical clinical phenotype, especially when tremor is initially present. </p><p>Among 20 families from northern India with SCA12, Bahl et al. (2005) identified expanded CAG repeats ranging from 51 to 69 triplets. Unaffected individuals had repeats ranging from 8 to 23 triplets. Of note, 1 asymptomatic individual was homozygous for an expanded repeat (52 and 59 triplets). Haplotype analysis identified 1 haplotype that was associated with the disease alleles, indicating a common founder. Bahl et al. (2005) estimated that SCA12 accounts for about 16% of all ADCA cases in northern India. </p>
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<strong>REFERENCES</strong>
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Bahl, S., Virdi, K., Mittal, U., Sachdeva, M. P., Kalla, A. K., Holmes, S. E., O'Hearn, E., Margolis, R. L., Jain, S., Srivastava, A. K., Mukerji, M.
<strong>Evidence of a common founder for SCA12 in the Indian population.</strong>
Ann. Hum. Genet. 69: 528-534, 2005.
[PubMed: 16138911]
[Full Text: https://doi.org/10.1046/j.1529-8817.2005.00173.x]
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</li>
<li>
<p class="mim-text-font">
Cholfin, J. A., Sobrido, M.-J., Perlman, S., Pulst, S. M., Geschwind, D. H.
<strong>The SCA12 mutation as a rare cause of spinocerebellar ataxia.</strong>
Arch. Neurol. 58: 1833-1835, 2001.
[PubMed: 11708992]
[Full Text: https://doi.org/10.1001/archneur.58.11.1833]
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</li>
<li>
<p class="mim-text-font">
Fujigasaki, H., Verma, I. C., Camuzat, A., Margolis, R. L., Zander, C., Lebre, A.-S., Jamot, L., Saxena, R., Anand, I., Holmes, S. E., Ross, C. A., Durr, A., Brice, A.
<strong>SCA12 is a rare locus for autosomal dominant cerebellar ataxia: a study of an Indian family.</strong>
Ann. Neurol. 49: 117-121, 2001.
[PubMed: 11198281]
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</li>
<li>
<p class="mim-text-font">
Holmes, S. E., O'Hearn, E. E., McInnis, M. G., Gorelick-Feldman, D. A., Kleiderlein, J. J., Callahan, C., Kwak, N. G., Ingersoll-Ashworth, R. G., Sherr, M., Sumner, A. J., Sharp, A. H., Ananth, U., Seltzer, W. K., Boss, M. A., Vieria-Saecker, A.-M., Epplen, J. T., Riess, O., Ross, C. A., Margolis, R. L.
<strong>Expansion of a novel CAG trinucleotide repeat in the 5-prime region of PPP2R2B is associated with SCA12. (Letter)</strong>
Nature Genet. 23: 391-392, 1999.
[PubMed: 10581021]
[Full Text: https://doi.org/10.1038/70493]
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<li>
<p class="mim-text-font">
O'Hearn, E., Holmes, S. E., Calvert, P. C., Ross, C. A., Margolis, R. L.
<strong>SCA-12: tremor with cerebellar and cortical atrophy is associated with a CAG repeat expansion.</strong>
Neurology 56: 299-303, 2001.
[PubMed: 11171892]
[Full Text: https://doi.org/10.1212/wnl.56.3.299]
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<li>
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Schalling, M., Hudson, T. J., Buetow, K. H., Housman, D. E.
<strong>Direct detection of novel expanded trinucleotide repeats in the human genome.</strong>
Nature Genet. 4: 135-139, 1993.
[PubMed: 8348150]
[Full Text: https://doi.org/10.1038/ng0693-135]
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Srivastava, A. K., Choudhry, S., Gopinath, M. S., Roy, S., Tripathi, M., Brahmachari, S. K., Jain, S.
<strong>Molecular and clinical correlation in five Indian families with spinocerebellar ataxia 12.</strong>
Ann. Neurol. 50: 796-800, 2001.
[PubMed: 11761478]
[Full Text: https://doi.org/10.1002/ana.10048]
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