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<title>
Entry
- #612291 - JOUBERT SYNDROME 8; JBTS8
- OMIM
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<span class="h4">#612291</span>
<br />
<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/612291"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS213300"> <strong>Phenotypic Series</strong> </a>
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<a href="#mapping">Mapping</a>
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<li role="presentation" style="margin-left: 1em">
<a href="#inheritance">Inheritance</a>
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<a href="#molecularGenetics">Molecular Genetics</a>
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<a href="#references"><strong>References</strong></a>
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<a href="#creationDate"><strong>Creation Date</strong></a>
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<div><a href="https://clinicaltrials.gov/search?cond=JOUBERT SYNDROME" class="mim-tip-hint" title="A registry of federally and privately supported clinical trials conducted in the United States and around the world." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Clinical Trials', 'domain': 'clinicaltrials.gov'})">Clinical Trials</a></div>
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<div><a href="https://wormbase.org/resources/disease/DOID:0111003" 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>
</div>
</div>
</div>
</div>
</div>
</div>
<span>
<span class="mim-tip-bottom" qtip_title="<strong>Looking for this gene or this phenotype in other resources?</strong>" qtip_text="Select a related resource from the dropdown menu and click for a targeted link to information directly relevant.">
&nbsp;
</span>
</span>
</div>
<div class="col-lg-8 col-lg-pull-2 col-md-8 col-md-pull-2 col-sm-8 col-sm-pull-2 col-xs-12">
<div>
<a id="title" class="mim-anchor"></a>
<div>
<a id="number" class="mim-anchor"></a>
<div class="text-right">
<a href="#" class="mim-tip-icd" qtip_title="<strong>ICD+</strong>" qtip_text="
<strong>ORPHA:</strong> 475<br />
<strong>DO:</strong> 0111003<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>
612291
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
JOUBERT SYNDROME 8; JBTS8
</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/3/482?start=-3&limit=10&highlight=482">
3q11.1-q11.2
</a>
</span>
</td>
<td>
<span class="mim-font">
Joubert syndrome 8
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612291"> 612291 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
ARL13B
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608922"> 608922 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/612291" 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')">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
</button>
</div>
&nbsp;
<div class="btn-group">
<a href="/phenotypicSeries/PS213300" 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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<span class="sr-only">Toggle Dropdown</span>
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&nbsp;
<div class="btn-group">
<button type="button" class="btn btn-success dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
PheneGene Graphics <span class="caret"></span>
</button>
<ul class="dropdown-menu" style="width: 17em;">
<li><a href="/graph/linear/612291" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/612291" 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 recessive <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/258211005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">258211005</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0441748&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0441748</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000007</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> GROWTH </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Weight </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Obesity (in 1 patient) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/414915002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">414915002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/414916001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">414916001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/E66.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">E66.9</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/278.00" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">278.00</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0028754&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0028754</a>, <a href="https://bioportal.bioontology.org/search?q=C4759928&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4759928</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001513" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001513</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001513" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001513</a>]</span><br />
</span>
</div>
</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> Eyes </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Pigmentary retinopathy <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/28835009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">28835009</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H35.52" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H35.52</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4551715&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4551715</a>, <a href="https://bioportal.bioontology.org/search?q=C0035334&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0035334</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000510" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000510</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0000580" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000580</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000580" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000580</a>]</span><br /> -
Optic disc pallor <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/302200001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">302200001</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0554970&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0554970</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000543" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000543</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000543" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000543</a>]</span><br /> -
Extinguished ERG <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4314947&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4314947</a>]</span><br /> -
Abnormal eye movements <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> RESPIRATORY </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Breathing anomalies <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3808579&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3808579</a>]</span><br />
</span>
</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">
- Molar tooth sign <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1865060&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1865060</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002419" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002419</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002419" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002419</a>]</span><br /> -
Occipital encephalocele (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/42376006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">42376006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q01.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q01.2</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0014067&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0014067</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002085" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002085</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002085" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002085</a>]</span><br /> -
Psychomotor delay <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/224958001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">224958001</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1144814003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1144814003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/F88" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">F88</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0557874&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0557874</a>, <a href="https://bioportal.bioontology.org/search?q=C5441816&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5441816</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001263" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001263</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001263" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001263</a>]</span><br /> -
Mental retardation <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/228156007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">228156007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/110359009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">110359009</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/317-319.99" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">317-319.99</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3714756&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3714756</a>, <a href="https://bioportal.bioontology.org/search?q=C0025362&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0025362</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001249" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001249</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001249" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001249</a>]</span><br /> -
Oculomotor apraxia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/193662007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">193662007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405810005" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405810005</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/405809000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">405809000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H16.32" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H16.32</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0543874&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0543874</a>, <a href="https://bioportal.bioontology.org/search?q=C0271270&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0271270</a>, <a href="https://bioportal.bioontology.org/search?q=C3489733&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3489733</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000657" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000657</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000657" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000657</a>]</span><br /> -
Hypotonia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398151007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398151007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/398152000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">398152000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0026827&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0026827</a>, <a href="https://bioportal.bioontology.org/search?q=C1858120&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1858120</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001290" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001290</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0001252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001252</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001252" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001252</a>]</span><br /> -
Ataxia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/20262006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">20262006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/39384006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">39384006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/85102008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">85102008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R27.0" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R27.0</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/438.84" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">438.84</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0004134&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0004134</a>, <a href="https://bioportal.bioontology.org/search?q=C1135207&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1135207</a>, <a href="https://bioportal.bioontology.org/search?q=C0007758&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0007758</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001251" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001251</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0010867" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0010867</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001251" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001251</a>]</span><br />
</span>
</div>
</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 mutation in the ADP-ribosylation factor-like GTPase 13B gene (ARL13B, <a href="/entry/608922#0001">608922.0001</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>
Joubert syndrome
- <a href="/phenotypicSeries/PS213300">PS213300</a>
- 43 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/1/84?start=-3&limit=10&highlight=84"> 1p36.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616781"> Joubert syndrome 25 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616781"> 616781 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616690"> CEP104 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616690"> 616690 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/555?start=-3&limit=10&highlight=555"> 2q13 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609583"> Joubert syndrome 4 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609583"> 609583 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607100"> NPHP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607100"> 607100 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/919?start=-3&limit=10&highlight=919"> 2q33.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614424"> Joubert syndrome 14 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614424"> 614424 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614423"> TMEM237 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614423"> 614423 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/1097?start=-3&limit=10&highlight=1097"> 2q37.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617622"> Joubert syndrome 30 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617622"> 617622 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617612"> ARMC9 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617612"> 617612 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/2/1104?start=-3&limit=10&highlight=1104"> 2q37.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615665"> Joubert syndrome 22 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615665"> 615665 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602676"> PDE6D </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/602676"> 602676 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/3/482?start=-3&limit=10&highlight=482"> 3q11.1-q11.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612291"> Joubert syndrome 8 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612291"> 612291 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608922"> ARL13B </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608922"> 608922 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/4/106?start=-3&limit=10&highlight=106"> 4p15.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612285"> Joubert syndrome 9 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612285"> 612285 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612013"> CC2D2A </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/612013"> 612013 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/116?start=-3&limit=10&highlight=116"> 5p13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614615"> Joubert syndrome 17 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614615"> 614615 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614571"> CPLANE1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614571"> 614571 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/5/402?start=-3&limit=10&highlight=402"> 5q23.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617761"> Joubert syndrome 31 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617761"> 617761 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613446"> CEP120 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613446"> 613446 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/6/884?start=-3&limit=10&highlight=884"> 6q23.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608629"> Joubert syndrome 3 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608629"> 608629 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608894"> AHI1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608894"> 608894 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/7/680?start=-3&limit=10&highlight=680"> 7q32.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614464"> Joubert syndrome 15 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614464"> 614464 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610523"> CEP41 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610523"> 610523 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/324?start=-3&limit=10&highlight=324"> 8q13.1-q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615636"> Joubert syndrome 21 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/615636"> 615636 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611654"> CSPP1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611654"> 611654 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/8/405?start=-3&limit=10&highlight=405"> 8q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610688"> Joubert syndrome 6 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610688"> 610688 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609884"> TMEM67 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609884"> 609884 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/9/111?start=-3&limit=10&highlight=111"> 9p21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619582"> Joubert syndrome 40 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619582"> 619582 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608040"> IFT74 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608040"> 608040 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/9/654?start=-3&limit=10&highlight=654"> 9q34.3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/213300"> Joubert syndrome 1 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/213300"> 213300 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613037"> INPP5E </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613037"> 613037 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/297?start=-3&limit=10&highlight=297"> 10q22.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618763"> Joubert syndrome 36 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618763"> 618763 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618413"> FAM149B1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618413"> 618413 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/428?start=-3&limit=10&highlight=428"> 10q24.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614815"> Joubert syndrome 18 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614815"> 614815 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613847"> TCTN3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613847"> 613847 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/521?start=-3&limit=10&highlight=521"> 10q24.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617757"> Joubert syndrome 32 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617757"> 617757 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607035"> SUFU </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607035"> 607035 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/10/523?start=-3&limit=10&highlight=523"> 10q24.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618161"> Joubert syndrome 35 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/618161"> 618161 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604695"> ARL3 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604695"> 604695 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/454?start=-3&limit=10&highlight=454"> 11q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614465"> Joubert syndrome 16 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614465"> 614465 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614459"> TMEM138 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614459"> 614459 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/455?start=-3&limit=10&highlight=455"> 11q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608091"> Joubert syndrome 2 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/608091"> 608091 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613277"> TMEM216 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613277"> 613277 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/11/1061?start=-3&limit=10&highlight=1061"> 11q24.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619562"> Joubert syndrome 39 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619562"> 619562 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619285"> TMEM218 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619285"> 619285 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/664?start=-3&limit=10&highlight=664"> 12q21.32 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610188"> Joubert syndrome 5 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610188"> 610188 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610142"> CEP290 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610142"> 610142 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/805?start=-3&limit=10&highlight=805"> 12q24.11 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614173"> Joubert syndrome 13 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614173"> 614173 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609863"> TCTN1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609863"> 609863 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/12/934?start=-3&limit=10&highlight=934"> 12q24.31 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616654"> Joubert syndrome 24 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616654"> 616654 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613846"> TCTN2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/613846"> 613846 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/13/218?start=-3&limit=10&highlight=218"> 13q21.33-q22.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617767"> Joubert syndrome 33 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617767"> 617767 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607532"> PIBF1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/607532"> 607532 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/197?start=-3&limit=10&highlight=197"> 14q21.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619185"> Joubert syndrome 37 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619185"> 619185 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617618"> TOGARAM1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617618"> 617618 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/14/276?start=-3&limit=10&highlight=276"> 14q23.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616490"> Joubert syndrome 23 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616490"> 616490 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610178"> KIAA0586 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610178"> 610178 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/15/503?start=-3&limit=10&highlight=503"> 15q26.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/200990"> Acrocallosal syndrome </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/200990"> 200990 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611254"> KIF7 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611254"> 611254 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/15/503?start=-3&limit=10&highlight=503"> 15q26.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/200990"> Joubert syndrome 12 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/200990"> 200990 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611254"> KIF7 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611254"> 611254 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/297?start=-3&limit=10&highlight=297"> 16p12.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616784"> Joubert syndrome 26 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616784"> 616784 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616650"> KATNIP </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616650"> 616650 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/421?start=-3&limit=10&highlight=421"> 16q12.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614844"> Joubert syndrome 19 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614844"> 614844 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604557"> ZNF423 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604557"> 604557 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/421?start=-3&limit=10&highlight=421"> 16q12.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614844"> Nephronophthisis 14 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>, <abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614844"> 614844 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604557"> ZNF423 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/604557"> 604557 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/436?start=-3&limit=10&highlight=436"> 16q12.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611560"> Joubert syndrome 7 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611560"> 611560 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610937"> RPGRIP1L </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/610937"> 610937 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/16/652?start=-3&limit=10&highlight=652"> 16q23.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614970"> Joubert syndrome 20 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
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<span class="mim-font">
<a href="/entry/614970"> 614970 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614949"> TMEM231 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614949"> 614949 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/121?start=-3&limit=10&highlight=121"> 17p13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619476"> ?Joubert syndrome 38 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/619476"> 619476 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617112"> KIAA0753 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617112"> 617112 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/198?start=-3&limit=10&highlight=198"> 17p13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617562"> ?Joubert syndrome 29 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617562"> 617562 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> TMEM107 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> 616183 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/198?start=-3&limit=10&highlight=198"> 17p13.1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617562"> Meckel syndrome 13 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617562"> 617562 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> TMEM107 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616183"> 616183 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/294?start=-3&limit=10&highlight=294"> 17p11.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617120"> Joubert syndrome 27 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617120"> 617120 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614144"> B9D1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614144"> 614144 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/17/781?start=-3&limit=10&highlight=781"> 17q22 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617121"> Joubert syndrome 28 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/617121"> 617121 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609883"> MKS1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/609883"> 609883 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/727?start=-3&limit=10&highlight=727"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614175"> Joubert syndrome 34 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614175"> 614175 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> B9D2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> 611951 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/19/727?start=-3&limit=10&highlight=727"> 19q13.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614175"> ?Meckel syndrome 10 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="Autosomal recessive">AR</abbr>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/614175"> 614175 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> B9D2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/611951"> 611951 </a>
</span>
</td>
</tr>
<tr>
<td>
<span class="mim-font">
<a href="/geneMap/X/70?start=-3&limit=10&highlight=70"> Xp22.2 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300804"> Joubert syndrome 10 </a>
</span>
</td>
<td>
<span class="mim-font">
<abbr class="mim-tip-hint" title="X-linked recessive">XLR</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/300804"> 300804 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300170"> OFD1 </a>
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300170"> 300170 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
<div class="text-right small">
<a href="#mimPhenotypicSeriesFold" data-toggle="collapse">&#9650;&nbsp;Close</a>
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<div>
<br />
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<div>
<a id="text" class="mim-anchor"></a>
<h4 href="#mimTextFold" id="mimTextToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
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<span class="mim-tip-floating" qtip_title="<strong>Looking For More References?</strong>" qtip_text="Click the 'reference plus' icon &lt;span class='glyphicon glyphicon-plus-sign'&gt;&lt;/span&gt at the end of each OMIM text paragraph to see more references related to the content of the preceding paragraph.">
<strong>TEXT</strong>
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</h4>
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<span class="mim-text-font">
<p>A number sign (#) is used with this entry because of evidence that Joubert syndrome-8 (JBTS8) is caused by homozygous or compound heterozygous mutation in the ARL13B gene (<a href="/entry/608922">608922</a>) on chromosome 3q11.</p><p>For a phenotypic description and a discussion of genetic heterogeneity of Joubert syndrome, see <a href="/entry/213300">213300</a>.</p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="clinicalFeatures" class="mim-anchor"></a>
<h4 href="#mimClinicalFeaturesFold" id="mimClinicalFeaturesToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimClinicalFeaturesToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Clinical Features</strong>
</span>
</h4>
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<div id="mimClinicalFeaturesFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p><a href="#1" class="mim-tip-reference" title="Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others. &lt;strong&gt;Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.&lt;/strong&gt; Am. J. Hum. Genet. 83: 170-179, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18674751/&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;18674751&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2008.06.023&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="18674751">Cantagrel et al. (2008)</a> studied 2 families with Joubert syndrome in which novel mutations in the ARL13B gene were subsequently found. The phenotype consisted predominantly of classical Joubert syndrome, with all patients displaying the molar tooth sign. In the Pakistani pedigree in which the disorder was mapped, 2 of the 3 affected individuals had a small occipital encephalocele. In the other family, from the United States, there was no occipital encephalocele, and there were no other supratentorial cerebral abnormalities. Diagnostic ultrasound, performed on both families, found no renal abnormalities. The possibility that renal symptoms could develop in the affected individuals was considered, as studies of urinary concentration defects, a more sensitive measure of early kidney involvement, were not available from any of the patients. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18674751" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#3" class="mim-tip-reference" title="Thomas, S., Cantagrel, V., Mariani, L., Serre, V., Lee, J.-E., Elkhartoufi, N., de Lonlay, P., Desguerre, I., Munnich, A., Boddaert, N., Lyonnet, S., Vekemans, M., Lisgo, S. N., Caspary, T., Gleeson, J., Attie-Bitach, T. &lt;strong&gt;Identification of a novel ARL13B variant in a Joubert syndrome-affected patient with retinal impairment and obesity.&lt;/strong&gt; Europ. J. Hum. Genet. 23: 621-627, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25138100/&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;25138100&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25138100[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ejhg.2014.156&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="25138100">Thomas et al. (2015)</a> reported a boy, born of consanguineous Tunisian parents, with Joubert syndrome. He was noted to have abnormal eye movements since birth. At age 1 month, he had jaundice, hepatomegaly, hyperventilation, hypertonia, and absence of eye contact. Later in early childhood, the liver abnormalities had disappeared, but he showed delayed psychomotor development with absent speech, pale optic discs, absent electroretinogram, ataxic gait, and the molar tooth sign on brain imaging. He was also obese. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25138100" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
</span>
<div>
<br />
</div>
</div>
<div>
<a id="mapping" class="mim-anchor"></a>
<h4 href="#mimMappingFold" id="mimMappingToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimMappingToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Mapping</strong>
</span>
</h4>
</div>
<div id="mimMappingFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p>Using linkage analysis in a consanguineous Pakistani family, <a href="#1" class="mim-tip-reference" title="Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others. &lt;strong&gt;Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.&lt;/strong&gt; Am. J. Hum. Genet. 83: 170-179, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18674751/&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;18674751&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2008.06.023&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="18674751">Cantagrel et al. (2008)</a> assigned the JBTS8 interval to a 107- to 112-cM region on chromosome 3p12.3-q12.3. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18674751" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
</span>
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<br />
</div>
</div>
<div>
<a id="inheritance" class="mim-anchor"></a>
<h4 href="#mimInheritanceFold" id="mimInheritanceToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimInheritanceToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
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<strong>Inheritance</strong>
</span>
</h4>
</div>
<div id="mimInheritanceFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p>The transmission pattern of Joubert syndrome-8 in the families reported by <a href="#1" class="mim-tip-reference" title="Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others. &lt;strong&gt;Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.&lt;/strong&gt; Am. J. Hum. Genet. 83: 170-179, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18674751/&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;18674751&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2008.06.023&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="18674751">Cantagrel et al. (2008)</a> was consistent with autosomal recessive inheritance. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18674751" 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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<br />
</div>
</div>
<div>
<a id="molecularGenetics" class="mim-anchor"></a>
<h4 href="#mimMolecularGeneticsFold" id="mimMolecularGeneticsToggle" class="mimTriangleToggle" style="cursor: pointer;" data-toggle="collapse">
<span id="mimMolecularGeneticsToggleTriangle" class="small mimTextToggleTriangle">&#9660;</span>
<span class="mim-font">
<strong>Molecular Genetics</strong>
</span>
</h4>
</div>
<div id="mimMolecularGeneticsFold" class="collapse in mimTextToggleFold">
<span class="mim-text-font">
<p>The JBTS8 interval defined by <a href="#1" class="mim-tip-reference" title="Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others. &lt;strong&gt;Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.&lt;/strong&gt; Am. J. Hum. Genet. 83: 170-179, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18674751/&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;18674751&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2008.06.023&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="18674751">Cantagrel et al. (2008)</a> contained 41 genes, of which 4 were considered strong candidates based on their identification within the cilia proteome. In the Pakistani family in which linkage to 3p12.3-q12.3 was established, <a href="#1" class="mim-tip-reference" title="Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others. &lt;strong&gt;Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.&lt;/strong&gt; Am. J. Hum. Genet. 83: 170-179, 2008.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/18674751/&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;18674751&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1016/j.ajhg.2008.06.023&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="18674751">Cantagrel et al. (2008)</a> identified a homozygous missense mutation in exon 3 of the ARL13B gene (R79Q; <a href="/entry/608922#0001">608922.0001</a>). The affected individual from another family was compound heterozygous for a nonsense mutation (W82X; <a href="/entry/608922#0002">608922.0002</a>) and a missense mutation (R200C; <a href="/entry/608922#0003">608922.0003</a>). Overexpression of human wildtype, but not patient mutant, ARL13B rescued the Arl13b 'scorpion' zebrafish mutant, demonstrating that ARL13B has an evolutionarily conserved role in mediating cilia function in multiple organs. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18674751" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p>In a boy, born of consanguineous Tunisian parents, with JBTS8, <a href="#3" class="mim-tip-reference" title="Thomas, S., Cantagrel, V., Mariani, L., Serre, V., Lee, J.-E., Elkhartoufi, N., de Lonlay, P., Desguerre, I., Munnich, A., Boddaert, N., Lyonnet, S., Vekemans, M., Lisgo, S. N., Caspary, T., Gleeson, J., Attie-Bitach, T. &lt;strong&gt;Identification of a novel ARL13B variant in a Joubert syndrome-affected patient with retinal impairment and obesity.&lt;/strong&gt; Europ. J. Hum. Genet. 23: 621-627, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25138100/&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;25138100&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25138100[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ejhg.2014.156&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="25138100">Thomas et al. (2015)</a> identified a homozygous missense mutation in the ARL13B gene (Y86C; <a href="/entry/608922#0004">608922.0004</a>). The mutation was found by a combination of homozygosity mapping and candidate gene sequencing. Expression of the mutation in arl13b-null zebrafish and mouse embryonic fibroblasts null for Arl13b showed only partial rescue of the null phenotype, consistent with a hypomorphic allele. <a href="#3" class="mim-tip-reference" title="Thomas, S., Cantagrel, V., Mariani, L., Serre, V., Lee, J.-E., Elkhartoufi, N., de Lonlay, P., Desguerre, I., Munnich, A., Boddaert, N., Lyonnet, S., Vekemans, M., Lisgo, S. N., Caspary, T., Gleeson, J., Attie-Bitach, T. &lt;strong&gt;Identification of a novel ARL13B variant in a Joubert syndrome-affected patient with retinal impairment and obesity.&lt;/strong&gt; Europ. J. Hum. Genet. 23: 621-627, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25138100/&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;25138100&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25138100[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ejhg.2014.156&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="25138100">Thomas et al. (2015)</a> found expression of the ARL13B gene within cilia in ventromedial hypothalamic neurons, and noted that the patient also had obesity. The patient had previously been reported as patient 3 by <a href="#2" class="mim-tip-reference" title="Romano, S., Boddaert, N., Desguerre, I., Hubert, L., Salomon, R., Seidenwurm, D., Bahi-Buisson, N., Nabbout, R., Sonigo, P., Lyonnet, S., Brunelle, F., Munnich, A., de Lonlay, P. &lt;strong&gt;Molar tooth sign and superior vermian dysplasia: a radiological, clinical, and genetic study.&lt;/strong&gt; Neuropediatrics 37: 42-45, 2006.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/16541367/&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;16541367&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1055/s-2006-923838&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="16541367">Romano et al. (2006)</a>. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=25138100+16541367" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<strong>REFERENCES</strong>
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<a id="1" class="mim-anchor"></a>
<a id="Cantagrel2008" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others.
<strong>Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.</strong>
Am. J. Hum. Genet. 83: 170-179, 2008.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/18674751/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">18674751</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=18674751" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1016/j.ajhg.2008.06.023" target="_blank">Full Text</a>]
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<a id="2" class="mim-anchor"></a>
<a id="Romano2006" class="mim-anchor"></a>
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<p class="mim-text-font">
Romano, S., Boddaert, N., Desguerre, I., Hubert, L., Salomon, R., Seidenwurm, D., Bahi-Buisson, N., Nabbout, R., Sonigo, P., Lyonnet, S., Brunelle, F., Munnich, A., de Lonlay, P.
<strong>Molar tooth sign and superior vermian dysplasia: a radiological, clinical, and genetic study.</strong>
Neuropediatrics 37: 42-45, 2006.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/16541367/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">16541367</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=16541367" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1055/s-2006-923838" target="_blank">Full Text</a>]
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<a id="Thomas2015" class="mim-anchor"></a>
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Thomas, S., Cantagrel, V., Mariani, L., Serre, V., Lee, J.-E., Elkhartoufi, N., de Lonlay, P., Desguerre, I., Munnich, A., Boddaert, N., Lyonnet, S., Vekemans, M., Lisgo, S. N., Caspary, T., Gleeson, J., Attie-Bitach, T.
<strong>Identification of a novel ARL13B variant in a Joubert syndrome-affected patient with retinal impairment and obesity.</strong>
Europ. J. Hum. Genet. 23: 621-627, 2015.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/25138100/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">25138100</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=25138100[PMID]&report=imagesdocsum" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Image', 'domain': 'ncbi.nlm.nih.gov'})">images</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25138100" 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/ejhg.2014.156" target="_blank">Full Text</a>]
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Contributors:
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<span class="mim-text-font">
Cassandra L. Kniffin - updated : 11/23/2015
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Creation Date:
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Ada Hamosh : 9/15/2008
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carol : 03/14/2024
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carol : 11/06/2017<br>carol : 11/24/2015<br>ckniffin : 11/23/2015<br>wwang : 9/25/2008<br>alopez : 9/15/2008
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<strong>#</strong> 612291
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JOUBERT SYNDROME 8; JBTS8
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<strong>ORPHA:</strong> 475; &nbsp;
<strong>DO:</strong> 0111003; &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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Gene/Locus <br /> MIM number
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3q11.1-q11.2
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Joubert syndrome 8
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612291
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Autosomal recessive
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3
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ARL13B
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608922
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that Joubert syndrome-8 (JBTS8) is caused by homozygous or compound heterozygous mutation in the ARL13B gene (608922) on chromosome 3q11.</p><p>For a phenotypic description and a discussion of genetic heterogeneity of Joubert syndrome, see 213300.</p>
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<strong>Clinical Features</strong>
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<p>Cantagrel et al. (2008) studied 2 families with Joubert syndrome in which novel mutations in the ARL13B gene were subsequently found. The phenotype consisted predominantly of classical Joubert syndrome, with all patients displaying the molar tooth sign. In the Pakistani pedigree in which the disorder was mapped, 2 of the 3 affected individuals had a small occipital encephalocele. In the other family, from the United States, there was no occipital encephalocele, and there were no other supratentorial cerebral abnormalities. Diagnostic ultrasound, performed on both families, found no renal abnormalities. The possibility that renal symptoms could develop in the affected individuals was considered, as studies of urinary concentration defects, a more sensitive measure of early kidney involvement, were not available from any of the patients. </p><p>Thomas et al. (2015) reported a boy, born of consanguineous Tunisian parents, with Joubert syndrome. He was noted to have abnormal eye movements since birth. At age 1 month, he had jaundice, hepatomegaly, hyperventilation, hypertonia, and absence of eye contact. Later in early childhood, the liver abnormalities had disappeared, but he showed delayed psychomotor development with absent speech, pale optic discs, absent electroretinogram, ataxic gait, and the molar tooth sign on brain imaging. He was also obese. </p>
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<strong>Mapping</strong>
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<p>Using linkage analysis in a consanguineous Pakistani family, Cantagrel et al. (2008) assigned the JBTS8 interval to a 107- to 112-cM region on chromosome 3p12.3-q12.3. </p>
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<strong>Inheritance</strong>
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<p>The transmission pattern of Joubert syndrome-8 in the families reported by Cantagrel et al. (2008) was consistent with autosomal recessive inheritance. </p>
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<strong>Molecular Genetics</strong>
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<p>The JBTS8 interval defined by Cantagrel et al. (2008) contained 41 genes, of which 4 were considered strong candidates based on their identification within the cilia proteome. In the Pakistani family in which linkage to 3p12.3-q12.3 was established, Cantagrel et al. (2008) identified a homozygous missense mutation in exon 3 of the ARL13B gene (R79Q; 608922.0001). The affected individual from another family was compound heterozygous for a nonsense mutation (W82X; 608922.0002) and a missense mutation (R200C; 608922.0003). Overexpression of human wildtype, but not patient mutant, ARL13B rescued the Arl13b 'scorpion' zebrafish mutant, demonstrating that ARL13B has an evolutionarily conserved role in mediating cilia function in multiple organs. </p><p>In a boy, born of consanguineous Tunisian parents, with JBTS8, Thomas et al. (2015) identified a homozygous missense mutation in the ARL13B gene (Y86C; 608922.0004). The mutation was found by a combination of homozygosity mapping and candidate gene sequencing. Expression of the mutation in arl13b-null zebrafish and mouse embryonic fibroblasts null for Arl13b showed only partial rescue of the null phenotype, consistent with a hypomorphic allele. Thomas et al. (2015) found expression of the ARL13B gene within cilia in ventromedial hypothalamic neurons, and noted that the patient also had obesity. The patient had previously been reported as patient 3 by Romano et al. (2006). </p>
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<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Cantagrel, V., Silhavy, J. L., Bielas, S. L., Swistun, D., Marsh, S. E., Bertrand, J. Y., Audollent, S., Attie-Bitach, T., Holden, K. R., Dobyns, W. B., Traver, D., Al-Gazali, L., and 14 others.
<strong>Mutations in the cilia gene ARL13B lead to the classical form of Joubert syndrome.</strong>
Am. J. Hum. Genet. 83: 170-179, 2008.
[PubMed: 18674751]
[Full Text: https://doi.org/10.1016/j.ajhg.2008.06.023]
</p>
</li>
<li>
<p class="mim-text-font">
Romano, S., Boddaert, N., Desguerre, I., Hubert, L., Salomon, R., Seidenwurm, D., Bahi-Buisson, N., Nabbout, R., Sonigo, P., Lyonnet, S., Brunelle, F., Munnich, A., de Lonlay, P.
<strong>Molar tooth sign and superior vermian dysplasia: a radiological, clinical, and genetic study.</strong>
Neuropediatrics 37: 42-45, 2006.
[PubMed: 16541367]
[Full Text: https://doi.org/10.1055/s-2006-923838]
</p>
</li>
<li>
<p class="mim-text-font">
Thomas, S., Cantagrel, V., Mariani, L., Serre, V., Lee, J.-E., Elkhartoufi, N., de Lonlay, P., Desguerre, I., Munnich, A., Boddaert, N., Lyonnet, S., Vekemans, M., Lisgo, S. N., Caspary, T., Gleeson, J., Attie-Bitach, T.
<strong>Identification of a novel ARL13B variant in a Joubert syndrome-affected patient with retinal impairment and obesity.</strong>
Europ. J. Hum. Genet. 23: 621-627, 2015.
[PubMed: 25138100]
[Full Text: https://doi.org/10.1038/ejhg.2014.156]
</p>
</li>
</ol>
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<br />
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<div class="col-lg-1 col-md-1 col-sm-2 col-xs-2">
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Contributors:
</span>
</div>
<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
Cassandra L. Kniffin - updated : 11/23/2015
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<div class="col-lg-1 col-md-1 col-sm-2 col-xs-2">
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Creation Date:
</span>
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<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
Ada Hamosh : 9/15/2008
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