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<title>
Entry
- #616355 - HOUGE-JANSSENS SYNDROME 1; HJS1
- OMIM
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<span class="h4">#616355</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/616355"><strong>Clinical Synopsis</strong></a>
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<a href="/phenotypicSeries/PS616355"> <strong>Phenotypic Series</strong> </a>
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<a href="#text"><strong>Text</strong></a>
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<a href="#description">Description</a>
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<li role="presentation" style="margin-left: 1em">
<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">
<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><a href="https://clinicaltrials.gov/search?cond=HOUGE-JANSSENS 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="http://www.informatics.jax.org/disease/616355" 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:0070065" 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> 457279<br />
<strong>DO:</strong> 0070065<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>
616355
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
HOUGE-JANSSENS SYNDROME 1; HJS1
</span>
</h3>
</div>
<div>
<br />
</div>
<div>
<a id="alternativeTitles" class="mim-anchor"></a>
<div>
<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
</span>
</p>
</div>
<div>
<h4>
<span class="mim-font">
INTELLECTUAL DEVELOPMENTAL DISORDER, AUTOSOMAL DOMINANT 35; MRD35<br />
MENTAL RETARDATION, AUTOSOMAL DOMINANT 35
</span>
</h4>
</div>
</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/6/510?start=-3&limit=10&highlight=510">
6p21.1
</a>
</span>
</td>
<td>
<span class="mim-font">
Houge-Janssens syndrome 1
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/616355"> 616355 </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">
PPP2R5D
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/601646"> 601646 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/616355" 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/PS616355" 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')">
<span class="caret"></span>
<span class="sr-only">Toggle Dropdown</span>
</button>
</div>
&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/616355" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/616355" 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> GROWTH </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Height </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Increased height (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/224997009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">224997009</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0557899&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0557899</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> Head </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Macrocephaly (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/12138000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">12138000</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1145403003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1145403003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q75.3" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q75.3</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0221355&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0221355</a>, <a href="https://bioportal.bioontology.org/search?q=C2243051&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2243051</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000256" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000256</a>, <a href="https://hpo.jax.org/app/browse/term/HP:0001355" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001355</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000256" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000256</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=dd989bb153739761147ef05dc870b050" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Macrocephaly-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=dd989bb153739761147ef05dc870b050&quot target=&quot;_blank&quot onclick=&quot;gtag(\'event\', \'mim_outbound\', {\'name\': \'EOM\', \'domain\': \'elementsofmorphology.nih.gov\'})&quot;&gt;Elements of Morphology&lt;/a&gt;"><span class="glyphicon glyphicon-user" aria-hidden="true"></span></a><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Face </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Broad, tall forehead <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1857354&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1857354</a>]</span><br /> -
Hypotonic facies <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4029280&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4029280</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000297" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000297</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000297" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000297</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">
- Hypertelorism, mild <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1854711&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1854711</a>]</span> <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/22006008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">22006008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/Q75.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">Q75.2</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/376.41" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">376.41</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000316" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000316</a>]</span> <a href="https://elementsofmorphology.nih.gov/index.cgi?tid=593a4d488f00bb03351a0ddffaf4ac9a" target="_blank" class="small mim-tip-eom" title="&lt;img src=&quot;https://elementsofmorphology.nih.gov/images/terms/Eyes,Widely_Spaced-small.jpg&quot;&gt; &lt;br/&gt;Further Information: &lt;a href=&quot;https://elementsofmorphology.nih.gov/index.cgi?tid=593a4d488f00bb03351a0ddffaf4ac9a&quot target=&quot;_blank&quot onclick=&quot;gtag(\'event\', \'mim_outbound\', {\'name\': \'EOM\', \'domain\': \'elementsofmorphology.nih.gov\'})&quot;&gt;Elements of Morphology&lt;/a&gt;"><span class="glyphicon glyphicon-user" aria-hidden="true"></span></a><br />
</span>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<em> Mouth </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Tented lip <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4228955&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4228955</a>]</span><br /> -
Open mouth <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/262016004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">262016004</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0240379&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0240379</a>, <a href="https://bioportal.bioontology.org/search?q=C4285242&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4285242</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000194" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000194</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000194" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000194</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">
- Delayed psychomotor development, moderate to severe <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3552771&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3552771</a>]</span> <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>]</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">[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 /> -
Poor or absent speech <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C3278212&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C3278212</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000750" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000750</a>]</span><br /> -
Hydrocephalus (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/230745008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">230745008</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/G91" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G91</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/G91.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G91.9</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0020255&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0020255</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000238" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000238</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000238" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000238</a>]</span><br /> -
Seizures (in some patients) <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/91175000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">91175000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0036572&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0036572</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001250" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001250</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">
- De novo mutation <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C2985439&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C2985439</a>]</span><br />
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<strong> MOLECULAR BASIS </strong>
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- Caused by mutation in the protein phosphatase 2, regulatory subunit B (B56), delta gene (PPP2R5D, <a href="/entry/601646#0001">601646.0001</a>)<br />
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Houge-Janssens syndrome
- <a href="/phenotypicSeries/PS616355">PS616355</a>
- 3 Entries
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<strong>Phenotype</strong>
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<strong>Inheritance</strong>
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<strong>Phenotype<br />mapping key</strong>
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<strong>Phenotype<br />MIM number</strong>
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<a href="/geneMap/5/467?start=-3&limit=10&highlight=467"> 5q31.1 </a>
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<a href="/entry/618354"> Houge-Janssens syndrome 3 </a>
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<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
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<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<a href="/entry/618354"> 618354 </a>
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<a href="/entry/176915"> PPP2CA </a>
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<a href="/entry/176915"> 176915 </a>
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<a href="/geneMap/6/510?start=-3&limit=10&highlight=510"> 6p21.1 </a>
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<a href="/entry/616355"> Houge-Janssens syndrome 1 </a>
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<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
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<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<a href="/entry/616355"> 616355 </a>
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<a href="/entry/601646"> PPP2R5D </a>
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<a href="/entry/601646"> 601646 </a>
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<a href="/geneMap/19/1046?start=-3&limit=10&highlight=1046"> 19q13.41 </a>
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<a href="/entry/616362"> Houge-Janssens syndrome 2 </a>
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<abbr class="mim-tip-hint" title="Autosomal dominant">AD</abbr>
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<abbr class="mim-tip-hint" title="3 - The molecular basis of the disorder is known"> 3 </abbr>
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<a href="/entry/616362"> 616362 </a>
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<a href="/entry/605983"> PPP2R1A </a>
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<a href="/entry/605983"> 605983 </a>
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<p>A number sign (#) is used with this entry because of evidence that Houge-Janssens syndrome-1 (HJS1) is caused by heterozygous mutation in the PPP2R5D gene (<a href="/entry/601646">601646</a>) on chromosome 6p21.</p>
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<p>Houge-Janssens syndrome-1 (HJS1) is characterized by global developmental delay, hypotonia, variably impaired intellectual development, poor speech, and dysmorphic facial features. Additional more variable features may include macrocephaly and seizures (<a href="#2" class="mim-tip-reference" title="Houge, G., Haesen, D., Vissers, L. E. L. M., Mehta, S., Parker, M. J., Wright, M., Vogt, J., McKee, S., Tolmie, J. L., Cordeiro, N., Kleefstra, T., Willemsen, M. H., and 17 others. &lt;strong&gt;B56-delta-related protein phosphatase 2A dysfunction identified in patients with intellectual disability.&lt;/strong&gt; J. Clin. Invest. 125: 3051-3062, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/26168268/&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;26168268&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=26168268[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/10.1172/JCI79860&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="26168268">Houge et al., 2015</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=26168268" 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><strong><em>Genetic Heterogeneity of Houge-Janssens Syndrome</em></strong></p><p>
Forms of Houge-Janssens syndrome are caused by mutations in the protein phosphatase type 2 family of genes. See also HJS2 (<a href="/entry/616362">616362</a>), caused by mutation in the PPP2R1A gene (<a href="/entry/605983">605983</a>) on chromosome 19q13; and HJS3 (<a href="/entry/618354">618354</a>), caused by mutation in the PPP2CA gene (<a href="/entry/176915">176915</a>) on chromosome 5q31.</p>
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<p>The <a href="#1" class="mim-tip-reference" title="Deciphering Developmental Disorders Study. &lt;strong&gt;Large-scale discovery of novel genetic causes of developmental disorders.&lt;/strong&gt; Nature 519: 223-228, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25533962/&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;25533962&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25533962[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/nature14135&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="25533962">Deciphering Developmental Disorders Study (2015)</a> identified 4 patients with intellectual disability and mutation in the PPP2R5D gene. The first patient was a girl with severe intellectual disability, hydrocephalus, chronic diarrhea, and hypoglycemia. The second was a boy with global developmental delay, seizures, ventriculomegaly, narrow forehead, downslanted palpebral fissures, pyloric stenosis, and macrocephaly. The third patient was a boy with global developmental delay, deeply set eyes, myopia, strabismus, and generalized hypotonia. The fourth was a girl with global developmental delay, congenital muscular torticollis, and congenital hip dislocation. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25533962" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#2" class="mim-tip-reference" title="Houge, G., Haesen, D., Vissers, L. E. L. M., Mehta, S., Parker, M. J., Wright, M., Vogt, J., McKee, S., Tolmie, J. L., Cordeiro, N., Kleefstra, T., Willemsen, M. H., and 17 others. &lt;strong&gt;B56-delta-related protein phosphatase 2A dysfunction identified in patients with intellectual disability.&lt;/strong&gt; J. Clin. Invest. 125: 3051-3062, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/26168268/&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;26168268&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=26168268[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/10.1172/JCI79860&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="26168268">Houge et al. (2015)</a> reported 7 additional children with an intellectual developmental disorder and mutation in the PPP2R5D gene. All had neonatal and persistent hypotonia and delayed psychomotor development with poor speech. Most had increased head circumference, which was associated with hydrocephalus in at least 1 case. Dysmorphic facial features included hypotonic face with tented upper lip, mild hypertelorism with downslanting palpebral fissures, and frontal bossing. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=26168268" 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="Loveday, C., Tatton-Brown, K., Clarke, M., Westwood, I., Renwick, A., Ramsay, E., Nemeth, A., Campbell, J., Joss, S., Gardner, M., Zachariou, A., Elliott, A., Ruark, E., van Montfort, R., Childhood Overgrowth Collaboration, Rahman, N. &lt;strong&gt;Mutations in the PP2A regulatory subunit B family genes PPP2R5B, PPP2R5C and PPP2R5D cause human overgrowth.&lt;/strong&gt; Hum. Molec. Genet. 24: 4775-4779, 2015. Note: Erratum: Hum. Molec. Genet. 28: 1578 only, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25972378/&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;25972378&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddv182&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="25972378">Loveday et al. (2015)</a> reported 3 unrelated patients with an intellectual developmental disorder associated with overgrowth, mainly macrocephaly, and mutation in the PPP2R5D gene. Two patients had increased height. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25972378" 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 heterozygous mutations in the PPP2R5D gene that were identified in patients with HJS1 by the <a href="#1" class="mim-tip-reference" title="Deciphering Developmental Disorders Study. &lt;strong&gt;Large-scale discovery of novel genetic causes of developmental disorders.&lt;/strong&gt; Nature 519: 223-228, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25533962/&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;25533962&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25533962[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/nature14135&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="25533962">Deciphering Developmental Disorders Study (2015)</a> occurred de novo. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25533962" 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 <a href="#1" class="mim-tip-reference" title="Deciphering Developmental Disorders Study. &lt;strong&gt;Large-scale discovery of novel genetic causes of developmental disorders.&lt;/strong&gt; Nature 519: 223-228, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25533962/&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;25533962&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25533962[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/nature14135&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="25533962">Deciphering Developmental Disorders Study (2015)</a> examined 1,133 children with severe, undiagnosed developmental disorders, and their parents, using a combination of exome sequencing and array-based detection of chromosomal rearrangements. The authors discovered 12 novel genes associated with developmental disorders. The PPP2R5D gene was implicated in a gene-specific analysis (p = 6.01 x 10(-12)). The <a href="#1" class="mim-tip-reference" title="Deciphering Developmental Disorders Study. &lt;strong&gt;Large-scale discovery of novel genetic causes of developmental disorders.&lt;/strong&gt; Nature 519: 223-228, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25533962/&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;25533962&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=25533962[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/nature14135&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="25533962">Deciphering Developmental Disorders Study (2015)</a> identified 4 patients with intellectual disability who had heterozygous de novo missense mutations in the PPP2R5D gene. Three patients carried the same mutation (E198K; <a href="/entry/601646#0001">601646.0001</a>), and the fourth carried a different mutation (P201R; <a href="/entry/601646#0002">601646.0002</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25533962" 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 7 unrelated patients with Houge-Janssens syndrome, <a href="#2" class="mim-tip-reference" title="Houge, G., Haesen, D., Vissers, L. E. L. M., Mehta, S., Parker, M. J., Wright, M., Vogt, J., McKee, S., Tolmie, J. L., Cordeiro, N., Kleefstra, T., Willemsen, M. H., and 17 others. &lt;strong&gt;B56-delta-related protein phosphatase 2A dysfunction identified in patients with intellectual disability.&lt;/strong&gt; J. Clin. Invest. 125: 3051-3062, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/26168268/&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;26168268&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=26168268[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/10.1172/JCI79860&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="26168268">Houge et al. (2015)</a> identified 5 different de novo heterozygous missense mutations in the PPP2R5D gene (<a href="/entry/601646#0001">601646.0001</a>-<a href="/entry/601646#0005">601646.0005</a>). Three of the patients carried the same E198K mutation. The mutations were found by parent-child trio exome sequencing and confirmed by Sanger sequencing. All mutations clustered in a highly conserved acidic loop that faces the A and C subunits of the PP2A complex, except one (P52S; <a href="/entry/601646#0003">601646.0003</a>). In vitro functional expression studies in HEK293 cells showed that all mutations, except P53S, showed deficient holoenzyme formation of PP2A with decreased association of the mutant PPP2R5D subunit to the A or C subunits, consistent with a dominant-negative effect. <a href="#2" class="mim-tip-reference" title="Houge, G., Haesen, D., Vissers, L. E. L. M., Mehta, S., Parker, M. J., Wright, M., Vogt, J., McKee, S., Tolmie, J. L., Cordeiro, N., Kleefstra, T., Willemsen, M. H., and 17 others. &lt;strong&gt;B56-delta-related protein phosphatase 2A dysfunction identified in patients with intellectual disability.&lt;/strong&gt; J. Clin. Invest. 125: 3051-3062, 2015.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/26168268/&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;26168268&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=26168268[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/10.1172/JCI79860&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="26168268">Houge et al. (2015)</a> suggested that disruption of normal phosphorylation in the brain may result in brain dysfunction, perhaps by having far-reaching consequences for regulation of localized signaling. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=26168268" 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="Loveday, C., Tatton-Brown, K., Clarke, M., Westwood, I., Renwick, A., Ramsay, E., Nemeth, A., Campbell, J., Joss, S., Gardner, M., Zachariou, A., Elliott, A., Ruark, E., van Montfort, R., Childhood Overgrowth Collaboration, Rahman, N. &lt;strong&gt;Mutations in the PP2A regulatory subunit B family genes PPP2R5B, PPP2R5C and PPP2R5D cause human overgrowth.&lt;/strong&gt; Hum. Molec. Genet. 24: 4775-4779, 2015. Note: Erratum: Hum. Molec. Genet. 28: 1578 only, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25972378/&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;25972378&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddv182&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="25972378">Loveday et al. (2015)</a> identified 2 different heterozygous missense mutations in the PPP2R5D gene (<a href="/entry/601646#0001">601646.0001</a> and <a href="/entry/601646#0004">601646.0004</a>) in 3 unrelated patients with Houge-Janssens syndrome associated with overgrowth, including macrocephaly. Functional studies of the variants were not performed, but <a href="#3" class="mim-tip-reference" title="Loveday, C., Tatton-Brown, K., Clarke, M., Westwood, I., Renwick, A., Ramsay, E., Nemeth, A., Campbell, J., Joss, S., Gardner, M., Zachariou, A., Elliott, A., Ruark, E., van Montfort, R., Childhood Overgrowth Collaboration, Rahman, N. &lt;strong&gt;Mutations in the PP2A regulatory subunit B family genes PPP2R5B, PPP2R5C and PPP2R5D cause human overgrowth.&lt;/strong&gt; Hum. Molec. Genet. 24: 4775-4779, 2015. Note: Erratum: Hum. Molec. Genet. 28: 1578 only, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25972378/&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;25972378&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddv182&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="25972378">Loveday et al. (2015)</a> postulated that they could plausibly alter the ability of PP2A to dephosphorylate target substrates. The first 2 patients were ascertained from a larger cohort of 111 parent-child trios with overgrowth syndrome, often associated with intellectual disability, who underwent exome sequencing. The third patient was ascertained from a cohort of 152 individuals with overgrowth phenotypes for whom parental DNA was not available. <a href="#3" class="mim-tip-reference" title="Loveday, C., Tatton-Brown, K., Clarke, M., Westwood, I., Renwick, A., Ramsay, E., Nemeth, A., Campbell, J., Joss, S., Gardner, M., Zachariou, A., Elliott, A., Ruark, E., van Montfort, R., Childhood Overgrowth Collaboration, Rahman, N. &lt;strong&gt;Mutations in the PP2A regulatory subunit B family genes PPP2R5B, PPP2R5C and PPP2R5D cause human overgrowth.&lt;/strong&gt; Hum. Molec. Genet. 24: 4775-4779, 2015. Note: Erratum: Hum. Molec. Genet. 28: 1578 only, 2019.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/25972378/&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;25972378&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddv182&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="25972378">Loveday et al. (2015)</a> postulated that the mutations may disrupt the PI3K (see <a href="/entry/171834">171834</a>)/AKT1 (<a href="/entry/164730">164730</a>) growth regulatory cascade. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25972378" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="1" class="mim-anchor"></a>
<a id="{Deciphering Developmental Disorders Study}2015" class="mim-anchor"></a>
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Deciphering Developmental Disorders Study.
<strong>Large-scale discovery of novel genetic causes of developmental disorders.</strong>
Nature 519: 223-228, 2015.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/25533962/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">25533962</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=25533962[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=25533962" 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/nature14135" target="_blank">Full Text</a>]
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<a id="Houge2015" class="mim-anchor"></a>
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Houge, G., Haesen, D., Vissers, L. E. L. M., Mehta, S., Parker, M. J., Wright, M., Vogt, J., McKee, S., Tolmie, J. L., Cordeiro, N., Kleefstra, T., Willemsen, M. H., and 17 others.
<strong>B56-delta-related protein phosphatase 2A dysfunction identified in patients with intellectual disability.</strong>
J. Clin. Invest. 125: 3051-3062, 2015.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/26168268/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">26168268</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=26168268[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=26168268" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1172/JCI79860" target="_blank">Full Text</a>]
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Loveday, C., Tatton-Brown, K., Clarke, M., Westwood, I., Renwick, A., Ramsay, E., Nemeth, A., Campbell, J., Joss, S., Gardner, M., Zachariou, A., Elliott, A., Ruark, E., van Montfort, R., Childhood Overgrowth Collaboration, Rahman, N.
<strong>Mutations in the PP2A regulatory subunit B family genes PPP2R5B, PPP2R5C and PPP2R5D cause human overgrowth.</strong>
Hum. Molec. Genet. 24: 4775-4779, 2015. Note: Erratum: Hum. Molec. Genet. 28: 1578 only, 2019.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/25972378/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">25972378</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=25972378" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1093/hmg/ddv182" target="_blank">Full Text</a>]
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Cassandra L. Kniffin - updated : 10/28/2015
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Ada Hamosh : 5/11/2015
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alopez : 12/05/2023
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carol : 08/02/2023<br>ckniffin : 08/02/2023<br>carol : 08/02/2023<br>alopez : 04/14/2022<br>carol : 10/02/2019<br>alopez : 11/02/2015<br>ckniffin : 10/28/2015<br>alopez : 5/13/2015<br>alopez : 5/13/2015<br>alopez : 5/12/2015
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<strong>#</strong> 616355
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HOUGE-JANSSENS SYNDROME 1; HJS1
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<em>Alternative titles; symbols</em>
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INTELLECTUAL DEVELOPMENTAL DISORDER, AUTOSOMAL DOMINANT 35; MRD35<br />
MENTAL RETARDATION, AUTOSOMAL DOMINANT 35
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<strong>ORPHA:</strong> 457279; &nbsp;
<strong>DO:</strong> 0070065; &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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6p21.1
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Houge-Janssens syndrome 1
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616355
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Autosomal dominant
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3
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PPP2R5D
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601646
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<strong>TEXT</strong>
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<p>A number sign (#) is used with this entry because of evidence that Houge-Janssens syndrome-1 (HJS1) is caused by heterozygous mutation in the PPP2R5D gene (601646) on chromosome 6p21.</p>
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<strong>Description</strong>
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<p>Houge-Janssens syndrome-1 (HJS1) is characterized by global developmental delay, hypotonia, variably impaired intellectual development, poor speech, and dysmorphic facial features. Additional more variable features may include macrocephaly and seizures (Houge et al., 2015). </p><p><strong><em>Genetic Heterogeneity of Houge-Janssens Syndrome</em></strong></p><p>
Forms of Houge-Janssens syndrome are caused by mutations in the protein phosphatase type 2 family of genes. See also HJS2 (616362), caused by mutation in the PPP2R1A gene (605983) on chromosome 19q13; and HJS3 (618354), caused by mutation in the PPP2CA gene (176915) on chromosome 5q31.</p>
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<strong>Clinical Features</strong>
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<p>The Deciphering Developmental Disorders Study (2015) identified 4 patients with intellectual disability and mutation in the PPP2R5D gene. The first patient was a girl with severe intellectual disability, hydrocephalus, chronic diarrhea, and hypoglycemia. The second was a boy with global developmental delay, seizures, ventriculomegaly, narrow forehead, downslanted palpebral fissures, pyloric stenosis, and macrocephaly. The third patient was a boy with global developmental delay, deeply set eyes, myopia, strabismus, and generalized hypotonia. The fourth was a girl with global developmental delay, congenital muscular torticollis, and congenital hip dislocation. </p><p>Houge et al. (2015) reported 7 additional children with an intellectual developmental disorder and mutation in the PPP2R5D gene. All had neonatal and persistent hypotonia and delayed psychomotor development with poor speech. Most had increased head circumference, which was associated with hydrocephalus in at least 1 case. Dysmorphic facial features included hypotonic face with tented upper lip, mild hypertelorism with downslanting palpebral fissures, and frontal bossing. </p><p>Loveday et al. (2015) reported 3 unrelated patients with an intellectual developmental disorder associated with overgrowth, mainly macrocephaly, and mutation in the PPP2R5D gene. Two patients had increased height. </p>
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<strong>Inheritance</strong>
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<p>The heterozygous mutations in the PPP2R5D gene that were identified in patients with HJS1 by the Deciphering Developmental Disorders Study (2015) occurred de novo. </p>
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<strong>Molecular Genetics</strong>
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<p>The Deciphering Developmental Disorders Study (2015) examined 1,133 children with severe, undiagnosed developmental disorders, and their parents, using a combination of exome sequencing and array-based detection of chromosomal rearrangements. The authors discovered 12 novel genes associated with developmental disorders. The PPP2R5D gene was implicated in a gene-specific analysis (p = 6.01 x 10(-12)). The Deciphering Developmental Disorders Study (2015) identified 4 patients with intellectual disability who had heterozygous de novo missense mutations in the PPP2R5D gene. Three patients carried the same mutation (E198K; 601646.0001), and the fourth carried a different mutation (P201R; 601646.0002). </p><p>In 7 unrelated patients with Houge-Janssens syndrome, Houge et al. (2015) identified 5 different de novo heterozygous missense mutations in the PPP2R5D gene (601646.0001-601646.0005). Three of the patients carried the same E198K mutation. The mutations were found by parent-child trio exome sequencing and confirmed by Sanger sequencing. All mutations clustered in a highly conserved acidic loop that faces the A and C subunits of the PP2A complex, except one (P52S; 601646.0003). In vitro functional expression studies in HEK293 cells showed that all mutations, except P53S, showed deficient holoenzyme formation of PP2A with decreased association of the mutant PPP2R5D subunit to the A or C subunits, consistent with a dominant-negative effect. Houge et al. (2015) suggested that disruption of normal phosphorylation in the brain may result in brain dysfunction, perhaps by having far-reaching consequences for regulation of localized signaling. </p><p>Loveday et al. (2015) identified 2 different heterozygous missense mutations in the PPP2R5D gene (601646.0001 and 601646.0004) in 3 unrelated patients with Houge-Janssens syndrome associated with overgrowth, including macrocephaly. Functional studies of the variants were not performed, but Loveday et al. (2015) postulated that they could plausibly alter the ability of PP2A to dephosphorylate target substrates. The first 2 patients were ascertained from a larger cohort of 111 parent-child trios with overgrowth syndrome, often associated with intellectual disability, who underwent exome sequencing. The third patient was ascertained from a cohort of 152 individuals with overgrowth phenotypes for whom parental DNA was not available. Loveday et al. (2015) postulated that the mutations may disrupt the PI3K (see 171834)/AKT1 (164730) growth regulatory cascade. </p>
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<strong>REFERENCES</strong>
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<p class="mim-text-font">
Deciphering Developmental Disorders Study.
<strong>Large-scale discovery of novel genetic causes of developmental disorders.</strong>
Nature 519: 223-228, 2015.
[PubMed: 25533962]
[Full Text: https://doi.org/10.1038/nature14135]
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Houge, G., Haesen, D., Vissers, L. E. L. M., Mehta, S., Parker, M. J., Wright, M., Vogt, J., McKee, S., Tolmie, J. L., Cordeiro, N., Kleefstra, T., Willemsen, M. H., and 17 others.
<strong>B56-delta-related protein phosphatase 2A dysfunction identified in patients with intellectual disability.</strong>
J. Clin. Invest. 125: 3051-3062, 2015.
[PubMed: 26168268]
[Full Text: https://doi.org/10.1172/JCI79860]
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Loveday, C., Tatton-Brown, K., Clarke, M., Westwood, I., Renwick, A., Ramsay, E., Nemeth, A., Campbell, J., Joss, S., Gardner, M., Zachariou, A., Elliott, A., Ruark, E., van Montfort, R., Childhood Overgrowth Collaboration, Rahman, N.
<strong>Mutations in the PP2A regulatory subunit B family genes PPP2R5B, PPP2R5C and PPP2R5D cause human overgrowth.</strong>
Hum. Molec. Genet. 24: 4775-4779, 2015. Note: Erratum: Hum. Molec. Genet. 28: 1578 only, 2019.
[PubMed: 25972378]
[Full Text: https://doi.org/10.1093/hmg/ddv182]
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