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Entry
- #304700 - MOHR-TRANEBJAERG SYNDROME; MTS
- OMIM
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<span class="h4">#304700</span>
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<a href="#phenotypeMap"><strong>Phenotype-Gene Relationships</strong></a>
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<a href="/clinicalSynopsis/304700"><strong>Clinical Synopsis</strong></a>
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<a href="#description">Description</a>
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<a href="#clinicalFeatures">Clinical Features</a>
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<a href="#inheritance">Inheritance</a>
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<a href="#mapping">Mapping</a>
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<a href="#pathogenesis">Pathogenesis</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="#contributors"><strong>Contributors</strong></a>
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<div><a href="https://clinicaltrials.gov/search?cond=MOHR-TRANEBJAERG 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://www.alliancegenome.org/disease/DOID:0050757" class="mim-tip-hint" title="Search Across Species; explore model organism and human comparative genomics." target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'Alliance Genome', 'domain': 'alliancegenome.org'})">Alliance Genome</a></div>
<div><a href="http://www.informatics.jax.org/disease/304700" 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:0050757" 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>SNOMEDCT:</strong> 702423009<br />
<strong>ORPHA:</strong> 52368<br />
<strong>DO:</strong> 0050757<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>
304700
</span>
</span>
</div>
</div>
<div>
<a id="preferredTitle" class="mim-anchor"></a>
<h3>
<span class="mim-font">
MOHR-TRANEBJAERG SYNDROME; MTS
</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">
DYSTONIA-DEAFNESS SYNDROME, X-LINKED; DDSX<br />
DEAFNESS-DYSTONIA-OPTIC ATROPHY SYNDROME; DDP<br />
DEAFNESS SYNDROME, PROGRESSIVE, WITH BLINDNESS, DYSTONIA, FRACTURES, AND MENTAL DEFICIENCY<br />
OPTICOACOUSTIC NERVE ATROPHY WITH DEMENTIA<br />
JENSEN SYNDROME
</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/X/499?start=-3&limit=10&highlight=499">
Xq22.1
</a>
</span>
</td>
<td>
<span class="mim-font">
Mohr-Tranebjaerg syndrome
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/304700"> 304700 </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">
TIMM8A
</span>
</td>
<td>
<span class="mim-font">
<a href="/entry/300356"> 300356 </a>
</span>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
<div class="btn-group ">
<a href="/clinicalSynopsis/304700" 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">
<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/304700" target="_blank" onclick="gtag('event', 'mim_graph', {'destination': 'Linear'})"> Linear </a></li>
<li><a href="/graph/radial/304700" 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">
- X-linked recessive <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1845977&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1845977</a>, <a href="https://bioportal.bioontology.org/search?q=C1279481&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1279481</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001419" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001419</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001419" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001419</a>]</span><br />
</span>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> HEAD & NECK </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<div>
<span class="h5 mim-font">
<em> Ears </em>
</span>
</div>
<div style="margin-left: 2em;">
<span class="mim-font">
- Sensorineural deafness, postlingual, progressive <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C1844673&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C1844673</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">
- Photophobia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/409668002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">409668002</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/246622003" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">246622003</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H53.14" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H53.14</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0085636&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0085636</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000613" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000613</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000613" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000613</a>]</span><br /> -
Cortical blindness <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/413924001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">413924001</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/68574006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">68574006</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H47.61" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H47.61</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/377.75" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">377.75</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0155320&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0155320</a>, <a href="https://bioportal.bioontology.org/search?q=C4048268&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4048268</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0100704" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0100704</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0100704" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0100704</a>]</span><br /> -
Myopia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/57190000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">57190000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/H52.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">H52.1</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/367.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">367.1</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0027092&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0027092</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000545" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000545</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000545" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000545</a>]</span><br /> -
Decreased visual acuity <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/13164000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">13164000</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234632&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234632</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0007663" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0007663</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0007663" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0007663</a>]</span><br /> -
Constricted visual fields <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/1151008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">1151008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0235095&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0235095</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001133" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001133</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001133" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001133</a>]</span><br /> -
Abnormal electroretinogram <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/274524001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">274524001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R94.111" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R94.111</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0476397&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0476397</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000512" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000512</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000512" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000512</a>]</span><br />
</span>
</div>
</div>
</div>
</div>
<div>
<div>
<span class="h5 mim-font">
<strong> SKELETAL </strong>
</span>
</div>
<div style="margin-left: 2em;">
<div>
<span class="mim-font">
- Fractures <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/125605004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">125605004</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/72704001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">72704001</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/T14.8" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">T14.8</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/829" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">829</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/E887" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">E887</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/800-829.99" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">800-829.99</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C4554413&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C4554413</a>, <a href="https://bioportal.bioontology.org/search?q=C0016658&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0016658</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0020110" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0020110</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">
- Dystonia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/15802004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">15802004</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/G24.9" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G24.9</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/G24" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">G24</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0013421&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0013421</a>, <a href="https://bioportal.bioontology.org/search?q=C0393593&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0393593</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001332" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001332</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001332" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001332</a>]</span><br /> -
Spasticity <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/221360009" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">221360009</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/397790002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">397790002</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0026838&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0026838</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001257" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001257</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001257" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001257</a>]</span><br /> -
Abnormal posturing <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/43029002" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">43029002</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R29.3" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R29.3</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/781.92" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">781.92</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0231471&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0231471</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002533" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002533</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002533" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002533</a>]</span><br /> -
Dysphagia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/288939007" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">288939007</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/40739000" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">40739000</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R13.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R13.1</a>, <a href="https://purl.bioontology.org/ontology/ICD10CM/R13.10" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R13.10</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/787.2" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">787.2</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/787.20" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">787.20</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0011168&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0011168</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002015" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002015</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0002015" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0002015</a>]</span><br /> -
Dysarthria <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/8011004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">8011004</a>]</span> <span class="mim-feature-ids hidden">[ICD9CM: <a href="https://purl.bioontology.org/ontology/ICD9CM/438.13" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">438.13</a>, <a href="https://purl.bioontology.org/ontology/ICD9CM/784.51" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD9CM\', \'domain\': \'bioontology.org\'})">784.51</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0013362&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0013362</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001260" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001260</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001260" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001260</a>]</span><br /> -
Tremor <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/26079004" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">26079004</a>]</span> <span class="mim-feature-ids hidden">[ICD10CM: <a href="https://purl.bioontology.org/ontology/ICD10CM/R25.1" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'ICD10CM\', \'domain\': \'bioontology.org\'})">R25.1</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0040822&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0040822</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001337" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001337</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001337" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001337</a>]</span><br /> -
Hyperreflexia <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/86854008" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">86854008</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0151889&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0151889</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001347" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001347</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001347" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001347</a>]</span><br /> -
Mental deterioration <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C0234985&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0234985</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001268" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001268</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0001268" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0001268</a>]</span><br />
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<em> Behavioral Psychiatric Manifestations </em>
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- Behavioral/psychiatric abnormalities <span class="mim-feature-ids hidden">[SNOMEDCT: <a href="https://purl.bioontology.org/ontology/SNOMEDCT/25786006" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">25786006</a>, <a href="https://purl.bioontology.org/ontology/SNOMEDCT/277843001" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'SNOMEDCT\', \'domain\': \'bioontology.org\'})">277843001</a>]</span> <span class="mim-feature-ids hidden">[UMLS: <a href="https://bioportal.bioontology.org/search?q=C5886745&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C5886745</a>, <a href="https://bioportal.bioontology.org/search?q=C0233514&searchproperties=true" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'UMLS\', \'domain\': \'bioontology.org\'})">C0233514</a> HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000708" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000708</a>]</span> <span class="mim-feature-ids hidden">[HPO: <a href="https://hpo.jax.org/app/browse/term/HP:0000708" target="_blank" onclick="gtag(\'event\', \'mim_outbound\', {\'name\': \'HPO\', \'domain\': \'hpo.jax.org\'})">HP:0000708</a>]</span><br />
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<strong> MISCELLANEOUS </strong>
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- Onset in childhood<br /> -
Deafness is presenting symptom<br />
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<strong> MOLECULAR BASIS </strong>
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- Caused by mutations in the deafness/dystonia-1 gene (TIMM8A, <a href="/entry/300356#0001">300356.0001</a>).<br />
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<p>A number sign (#) is used with this entry because Mohr-Tranebjaerg syndrome (MTS) is caused by mutation in the DDP gene (TIMM8A; <a href="/entry/300356">300356</a>) on chromosome Xq22.</p>
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<strong>Description</strong>
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<p>Mohr-Tranebjaerg syndrome (MTS) is characterized by early childhood onset of postlingual progressive sensorineural deafness followed by progressive dystonia, mental deterioration, cortical blindness, spasticity, and psychiatric manifestations (summary by <a href="#16" class="mim-tip-reference" title="Ujike, H., Tanabe, Y., Takehisa, Y., Hayabara, T., Kuroda, S. &lt;strong&gt;A family with X-linked dystonia-deafness syndrome with a novel mutation of the DDP gene.&lt;/strong&gt; Arch. Neurol. 58: 1004-1007, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11405816/&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;11405816&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1001/archneur.58.6.1004&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="11405816">Ujike et al., 2001</a>). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11405816" 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>Clinical Features</strong>
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<p><a href="#7" class="mim-tip-reference" title="Mohr, J., Mageroy, K. &lt;strong&gt;Sex-linked deafness of a possibly new type.&lt;/strong&gt; Acta Genet. Statist. Med. 10: 54-62, 1960.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/13771732/&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;13771732&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1159/000151118&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="13771732">Mohr and Mageroy (1960)</a> described a Norwegian family in which males in 4 generations were affected with a progressive form of deafness. Sufficient hearing was present at first such that speech developed normally, then deteriorated. Impaired hearing first became evident at age 3 to 5 years. The first individual deduced to be a heterozygous carrier lived in Nordvik, a small fishing village on an island in north Norway, about midway between Narvik and Trondheim. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=13771732" 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>Although originally reported as nonsyndromic X-linked recessive deafness, <a href="#14" class="mim-tip-reference" title="Tranebjaerg, L., Schwartz, C., Huggins, K., Barker, D., Stevenson, R., Arena, J. F., Gedde-Dahl, T., Mikkelsen, M., Mellgren, S., Andersen, K., Hansen, E., Dahl, A., Eriksen, H., Lubs, H. &lt;strong&gt;X-linked recessive mental retardation with progressive sensorineural deafness, blindness, spastic paraplegia and dystonia. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 51 (suppl.): A47 only, 1992."None>Tranebjaerg et al. (1992)</a> and <a href="#13" class="mim-tip-reference" title="Tranebjaerg, L., Schwartz, C., Eriksen, H., Andreasson, S., Ponjavic, V., Dahl, A., Stevenson, R. E., May, M., Arena, F., Barker, D., Elverland, H. H., Lubs, H. &lt;strong&gt;A new X linked recessive deafness syndrome with blindness, dystonia, fractures, and mental deficiency is linked to Xq22.&lt;/strong&gt; J. Med. Genet. 32: 257-263, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7643352/&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;7643352&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/jmg.32.4.257&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="7643352">Tranebjaerg et al. (1995)</a> found on reinvestigation several ocular features in the family of <a href="#7" class="mim-tip-reference" title="Mohr, J., Mageroy, K. &lt;strong&gt;Sex-linked deafness of a possibly new type.&lt;/strong&gt; Acta Genet. Statist. Med. 10: 54-62, 1960.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/13771732/&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;13771732&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1159/000151118&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="13771732">Mohr and Mageroy (1960)</a>, including myopia, decreased visual acuity, constricted visual fields, and abnormal electroretinogram. The deafness was shown to be part of a progressive syndrome that included visual disability leading to cortical blindness, dystonia, fractures, and mental deficiency. <a href="https://pubmed.ncbi.nlm.nih.gov/?term=7643352+13771732" 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 2 and perhaps 3 males in 3 successive generations, connected through possible carrier females, <a href="#10" class="mim-tip-reference" title="Scribanu, N., Kennedy, C. &lt;strong&gt;Familial syndrome with dystonia, neural deafness, and possible intellectual impairment: clinical course and pathological findings.&lt;/strong&gt; Adv. Neurol. 14: 235-243, 1976.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/181965/&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;181965&lt;/a&gt;]" pmid="181965">Scribanu and Kennedy (1976)</a> observed dystonia and deafness. Deafness, first recognized at age 2 years in the affected member most fully studied, was progressive. Severe dysarthria, striking deterioration of handwriting, occasional bizarre posturing of head and neck, and hyperactivity were evident by age 8, and he died at age 11. The proband's maternal uncle had onset of deafness at age 6 years, followed by progressive dystonia such that after age 18 years he was unable to walk or talk. He died at age 20. A nephew of the proband, at age 6, has sensorineural deafness but no clear evidence of motor disorder. Pathologic changes were mainly neuronal loss and gliosis in the basal ganglia. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=181965" 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="#8" class="mim-tip-reference" title="Pelletier, L., Tanguay, R. B. &lt;strong&gt;X-linked recessive inheritance of sensorineural hearing loss expressed during adolescence.&lt;/strong&gt; Am. J. Hum. Genet. 27: 609-613, 1975.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/1163535/&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;1163535&lt;/a&gt;]" pmid="1163535">Pelletier and Tanguay (1975)</a> described a family in which 8 males in 4 generations became deaf in adolescence. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1163535" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#4" class="mim-tip-reference" title="Jensen, P. K. A. &lt;strong&gt;Nerve deafness, optic nerve atrophy, and dementia: a new X-linked recessive syndrome?&lt;/strong&gt; Am. J. Med. Genet. 9: 55-60, 1981.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7195649/&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;7195649&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ajmg.1320090110&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="7195649">Jensen (1981)</a> described a 3-year-old boy and his 2 maternal uncles, aged 33 and 41 years, with a seemingly 'new' syndrome characterized by profound sensorineural hearing loss with onset in infancy, followed in adolescence by progressive optic nerve atrophy with loss of vision and in adulthood by progressive dementia. Jensen et al. (<a href="#2" class="mim-tip-reference" title="Jensen, P. K. A., Reske-Nielsen, E., Hein-Sorensen, O., Warburg, M. &lt;strong&gt;The syndrome of opticoacoustic nerve atrophy with dementia.&lt;/strong&gt; Am. J. Med. Genet. 28: 517-518, 1987.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/3425626/&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;3425626&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/ajmg.1320280234&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="3425626">1987</a>, <a href="#3" class="mim-tip-reference" title="Jensen, P. K. A., Reske-Nielsen, E., Hein-Sorensen, O. &lt;strong&gt;The syndrome of opticoacoustic nerve atrophy with dementia: a new X-linked recessive syndrome with extensive calcifications of the central nervous system. (Abstract)&lt;/strong&gt; Clin. Genet. 35: 222-223, 1989."None>1989</a>) gave follow-up on this Danish family. The new data indicated that the syndrome is a generalized degenerative disease of the central nervous system and strengthened the original proposal that the syndrome is genetic with X-linked recessive inheritance. Both of the uncles died at the age of about 40 years in a state of general deterioration. In one of them the most striking finding at autopsy was the presence of extensive calcification located in all parts of the central nervous system and affecting all structures, including meninges, vessels, and neurons. Calcification was thought to be secondary to the degenerative changes. Moderate diffuse wasting of skeletal muscles was found. <a href="#12" class="mim-tip-reference" title="Tranebjaerg, L., Jensen, P. K. A., Van Ghelue, M., Vnencak-Jones, C. L., Sund, S., Elgjo, K., Jakobsen, J., Lindal, S., Warburg, M., Fuglsang-Frederiksen, A., Skullerud, K. &lt;strong&gt;Neuronal cell death in the visual cortex is a prominent feature of the X-linked recessive mitochondrial deafness-dystonia syndrome caused by mutations in the TIMM8a gene.&lt;/strong&gt; Ophthalmic Genet. 22: 207-223, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11803487/&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;11803487&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1076/opge.22.4.207.2220&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="11803487">Tranebjaerg et al. (2001)</a> studied the affected nephew in this family, who was then 21 years old. He had a cerebral scan at age 9, which showed moderate cortical atrophy. At age 19, he had dysphagia and moderate ataxic gait. There was no dystonia. He was mildly 'demented.' Positron emission tomography scan showed abnormally low uptake by the parietal and temporal lobes, and especially low uptake by the medial and frontal areas of the temporal lobes, similar to the abnormal pattern seen in Alzheimer dementia. Unlike his maternal uncles, he had ophthalmologically normal optic discs and no subjective visual complaints despite progressive visual evoked potential abnormalities. <a href="#12" class="mim-tip-reference" title="Tranebjaerg, L., Jensen, P. K. A., Van Ghelue, M., Vnencak-Jones, C. L., Sund, S., Elgjo, K., Jakobsen, J., Lindal, S., Warburg, M., Fuglsang-Frederiksen, A., Skullerud, K. &lt;strong&gt;Neuronal cell death in the visual cortex is a prominent feature of the X-linked recessive mitochondrial deafness-dystonia syndrome caused by mutations in the TIMM8a gene.&lt;/strong&gt; Ophthalmic Genet. 22: 207-223, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11803487/&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;11803487&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1076/opge.22.4.207.2220&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="11803487">Tranebjaerg et al. (2001)</a> thought that the optic nerve atrophy in the uncles was probably an end-stage expression of a widespread diffuse neuropathy supported by the neuropathologic findings in the family. Based on a comparison of the features in the Danish family, originally thought to have a distinct syndrome called Jensen syndrome, and the features in the original Norwegian family that led to the description of the Mohr-Tranebjaerg syndrome, <a href="#12" class="mim-tip-reference" title="Tranebjaerg, L., Jensen, P. K. A., Van Ghelue, M., Vnencak-Jones, C. L., Sund, S., Elgjo, K., Jakobsen, J., Lindal, S., Warburg, M., Fuglsang-Frederiksen, A., Skullerud, K. &lt;strong&gt;Neuronal cell death in the visual cortex is a prominent feature of the X-linked recessive mitochondrial deafness-dystonia syndrome caused by mutations in the TIMM8a gene.&lt;/strong&gt; Ophthalmic Genet. 22: 207-223, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11803487/&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;11803487&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1076/opge.22.4.207.2220&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="11803487">Tranebjaerg et al. (2001)</a> concluded that the disorders should 'be lumped into one deafness-dystonia-optic neuropathy syndrome.' <a href="https://pubmed.ncbi.nlm.nih.gov/?term=3425626+7195649+11803487" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#1" class="mim-tip-reference" title="Hayes, M. W., Ouvrier, R. A., Evans, W., Somerville, E., Morris, J. G. L. &lt;strong&gt;X-linked dystonia-deafness syndrome.&lt;/strong&gt; Mov. Disord. 13: 303-308, 1998.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/9539345/&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;9539345&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1002/mds.870130217&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="9539345">Hayes et al. (1998)</a> used the designation X-linked dystonia-deafness syndrome for the disorder in an Australian family of Anglo-Saxon extraction. The kindred contained 2 pairs of half brothers, each with the same mother. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9539345" 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="#16" class="mim-tip-reference" title="Ujike, H., Tanabe, Y., Takehisa, Y., Hayabara, T., Kuroda, S. &lt;strong&gt;A family with X-linked dystonia-deafness syndrome with a novel mutation of the DDP gene.&lt;/strong&gt; Arch. Neurol. 58: 1004-1007, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11405816/&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;11405816&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1001/archneur.58.6.1004&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="11405816">Ujike et al. (2001)</a> reported the first non-white family with the disorder, affecting 5 males in 4 generations of a Japanese family. Deafness presented at an early age, followed by varying degrees of dystonia presenting at ages 15 to 30 years. Two individuals had mild mental deterioration, and visual disability was absent in all. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11405816" 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>Clinical Variability</em></strong></p><p>
The 3 families in which <a href="#5" class="mim-tip-reference" title="Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D. &lt;strong&gt;A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.&lt;/strong&gt; Nature Genet. 14: 177-180, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8841189/&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;8841189&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng1096-177&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="8841189">Jin et al. (1996)</a> demonstrated mutations in the DDP gene (see MOLECULAR GENETICS) displayed overlapping but not identical deafness phenotypes. The disease was most severe in the original Norwegian family, in which mental deterioration and blindness were evident in virtually every affected individual, and least severe in another patient with a large deletion (<a href="/entry/300356#0006">300356.0006</a>) and his affected relatives who suffered from only deafness and dystonia. However, the mental deterioration and blindness associated with MTS typically occur later in life, and no affected male in the large deletion family had survived beyond the age of 9 years due to the higher morbidity associated with having X-linked agammaglobulinemia. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8841189" 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="inheritance" class="mim-anchor"></a>
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<p>Full studies of the original Norwegian family by <a href="#13" class="mim-tip-reference" title="Tranebjaerg, L., Schwartz, C., Eriksen, H., Andreasson, S., Ponjavic, V., Dahl, A., Stevenson, R. E., May, M., Arena, F., Barker, D., Elverland, H. H., Lubs, H. &lt;strong&gt;A new X linked recessive deafness syndrome with blindness, dystonia, fractures, and mental deficiency is linked to Xq22.&lt;/strong&gt; J. Med. Genet. 32: 257-263, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7643352/&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;7643352&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/jmg.32.4.257&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="7643352">Tranebjaerg et al. (1995)</a> indicated that in the 16 affected males in 5 generations, X-linked recessive inheritance and postlingual progressive sensorineural deafness were quite certain. Some obligate carrier females showed signs of minor neuropathy and mild hearing impairment. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7643352" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<a id="mapping" class="mim-anchor"></a>
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<p>Linkage analysis performed by <a href="#14" class="mim-tip-reference" title="Tranebjaerg, L., Schwartz, C., Huggins, K., Barker, D., Stevenson, R., Arena, J. F., Gedde-Dahl, T., Mikkelsen, M., Mellgren, S., Andersen, K., Hansen, E., Dahl, A., Eriksen, H., Lubs, H. &lt;strong&gt;X-linked recessive mental retardation with progressive sensorineural deafness, blindness, spastic paraplegia and dystonia. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 51 (suppl.): A47 only, 1992."None>Tranebjaerg et al. (1992)</a> yielded a maximum lod score of 3.96 with DXS17, which is localized to Xq22 and is closely linked to the COL4A5 gene (<a href="/entry/303630">303630</a>), the site of the mutation in X-linked Alport syndrome (<a href="/entry/301050">301050</a>). However, there was no family history of renal disease, and in the linkage studies, 1 recombinant with COL4A5 was observed. Linkage analysis by <a href="#13" class="mim-tip-reference" title="Tranebjaerg, L., Schwartz, C., Eriksen, H., Andreasson, S., Ponjavic, V., Dahl, A., Stevenson, R. E., May, M., Arena, F., Barker, D., Elverland, H. H., Lubs, H. &lt;strong&gt;A new X linked recessive deafness syndrome with blindness, dystonia, fractures, and mental deficiency is linked to Xq22.&lt;/strong&gt; J. Med. Genet. 32: 257-263, 1995.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/7643352/&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;7643352&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1136/jmg.32.4.257&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="7643352">Tranebjaerg et al. (1995)</a> indicated that the locus was linked to DXS101 in Xq22 with a lod score of 5.37 (zero recombination). <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7643352" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p>
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<p><a href="#6" class="mim-tip-reference" title="Koehler, C. M., Leuenberger, D., Merchant, S., Renold, A., Junne, T., Schatz, G. &lt;strong&gt;Human deafness dystonia syndrome is a mitochondrial disease.&lt;/strong&gt; Proc. Nat. Acad. Sci. 96: 2141-2146, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10051608/&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;10051608&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10051608[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.96.5.2141&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="10051608">Koehler et al. (1999)</a> determined the function of the DDP gene and concluded that the Mohr-Tranebjaerg syndrome is a novel type of mitochondrial disease that is most likely caused by a defective mitochondrial protein-import system. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10051608" 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="#17" class="mim-tip-reference" title="Wallace, D. C., Murdock, D. G. &lt;strong&gt;Mitochondria and dystonia: the movement disorder connection?&lt;/strong&gt; Proc. Nat. Acad. Sci. 96: 1817-1819, 1999.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10051550/&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;10051550&lt;/a&gt;, &lt;a href=&quot;https://www.ncbi.nlm.nih.gov/pmc/?term=10051550[PMID]&amp;report=imagesdocsum&quot; target=&quot;_blank&quot; onclick=&quot;gtag(&#x27;event&#x27;, &#x27;mim_outbound&#x27;, {&#x27;name&#x27;: &#x27;PubMed Image&#x27;, &#x27;domain&#x27;: &#x27;ncbi.nlm.nih.gov&#x27;})&quot;&gt;images&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1073/pnas.96.5.1817&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="10051550">Wallace and Murdock (1999)</a> commented that the demonstrated involvement of DDP in the import of mitochondrial proteins implies that the underlying defect of the Mohr-Tranebjaerg syndrome is a defect in mitochondrial oxidative phosphorylation (OXPHOS), specifically due to deficiencies in carrier proteins. They found this conclusion particularly satisfying, since the phenotypes associated with the systemic OXPHOS defects resulting from mutations in mitochondrial DNA give an array of clinical symptoms that overlap with those of the Mohr-Tranebjaerg syndrome. Hence, deafness and dystonia associated with basal ganglia degeneration can now be linked to mitochondrial defects resulting from nuclear DNA as well as mitochondrial DNA mutations. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10051550" 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>The biogenesis of the mitochondrial inner membrane is dependent on 2 distinct 70-kD protein complexes, one of which is formed by TIMM8A and TIMM13 (<a href="/entry/607383">607383</a>) in the mitochondrial intermembrane space. The TIMM8A/TIMM13 complex facilitates the import of the inner membrane substrate TIMM23 (<a href="/entry/605034">605034</a>). <a href="#9" class="mim-tip-reference" title="Roesch, K., Hynds, P. J., Varga, R., Tranebjaerg, L., Koehler, C. M. &lt;strong&gt;The calcium-binding aspartate/glutamate carriers, citrin and aralar1, are new substrates for the DDP1/TIMM8a-TIMM13 complex.&lt;/strong&gt; Hum. Molec. Genet. 13: 2101-2111, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/15254020/&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;15254020&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddh217&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="15254020">Roesch et al. (2004)</a> determined that citrin (SLC25A13; <a href="/entry/603859">603859</a>) and aralar (SLC25A12; <a href="/entry/603667">603667</a>), which are Ca(2+)-binding aspartate/glutamate carriers (AGC) of the mitochondrial inner membrane, are substrates for the TIMM8A/TIMM13 complex. The AGCs function in the aspartate-malate NADH shuttle that moves reducing equivalents from the cytosol to the mitochondrial matrix. A lymphoblast cell line derived from an MTS patient had decreased NADH levels and defects in mitochondrial protein import. Protein expression studies indicated that DDP1 and TIMM13 showed nonuniform expression in mammals, and expression was prominent in the large neurons in the brain, which is in agreement with the expression pattern of SLC25A12. <a href="#9" class="mim-tip-reference" title="Roesch, K., Hynds, P. J., Varga, R., Tranebjaerg, L., Koehler, C. M. &lt;strong&gt;The calcium-binding aspartate/glutamate carriers, citrin and aralar1, are new substrates for the DDP1/TIMM8a-TIMM13 complex.&lt;/strong&gt; Hum. Molec. Genet. 13: 2101-2111, 2004.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/15254020/&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;15254020&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1093/hmg/ddh217&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="15254020">Roesch et al. (2004)</a> hypothesized that insufficient NADH shuttling, linked with changes in Ca(2+) concentration, in sensitive cells of the CNS might contribute to the pathologic process associated with MTS. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15254020" 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>Molecular Genetics</strong>
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<p>Using positional information from a patient with sensorineural deafness and dystonia and a 21-kb deletion in Xq22, <a href="#5" class="mim-tip-reference" title="Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D. &lt;strong&gt;A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.&lt;/strong&gt; Nature Genet. 14: 177-180, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8841189/&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;8841189&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng1096-177&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="8841189">Jin et al. (1996)</a> characterized a novel transcript lying within the deletion as a candidate for the complex syndrome of Mohr and Tranebjaerg. <a href="#5" class="mim-tip-reference" title="Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D. &lt;strong&gt;A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.&lt;/strong&gt; Nature Genet. 14: 177-180, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8841189/&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;8841189&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng1096-177&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="8841189">Jin et al. (1996)</a> suggested that this gene, which they termed DDP (<a href="/entry/300356">300356</a>), was necessary for normal human neurologic development. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8841189" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})"><span class="glyphicon glyphicon-plus-sign mim-tip-hint" title="Click this 'reference-plus' icon to see articles related to this paragraph in PubMed."></span></a></p><p><a href="#5" class="mim-tip-reference" title="Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D. &lt;strong&gt;A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.&lt;/strong&gt; Nature Genet. 14: 177-180, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8841189/&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;8841189&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng1096-177&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="8841189">Jin et al. (1996)</a> determined that the large 21-kb deletion resulted in deletion of the entire DDP gene (<a href="/entry/300356#0006">300356.0006</a>), as well as disruption of the BTK gene, which is involved in the immunodeficiency X-linked agammaglobulinemia (<a href="/entry/300755">300755</a>). In 2 additional families, <a href="#5" class="mim-tip-reference" title="Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D. &lt;strong&gt;A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.&lt;/strong&gt; Nature Genet. 14: 177-180, 1996.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/8841189/&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;8841189&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/ng1096-177&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="8841189">Jin et al. (1996)</a> discovered 2 small deletions in DPP: a 1-bp deletion (<a href="/entry/300356#0001">300356.0001</a>) in the original Norwegian family and a 10-bp deletion (<a href="/entry/300356#0002">300356.0002</a>) in a third family with deafness, dystonia, and mental deficiency, but not blindness. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8841189" 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 male patient from the Dutch family thought to have a distinct disorder called Jensen syndrome, <a href="#15" class="mim-tip-reference" title="Tranebjaerg, L., van Ghelue, M., Nilssen, O., Hodes, M. E., Dlouhy, S. R., Farlow, M. R., Hamel, B., Arts, W. F. M., Jankovic, J., Beach, J., Jensen, P. K. A. &lt;strong&gt;Jensen syndrome is allelic to Mohr-Tranebjaerg syndrome and both are caused by stop mutations in the DDP gene. (Abstract)&lt;/strong&gt; Am. J. Hum. Genet. 61 (suppl.): A349 only, 1997."None>Tranebjaerg et al. (1997)</a> identified a nonsense mutation in the TIMM8A gene (E24X; <a href="/entry/300356#0003">300356.0003</a>). <a href="#12" class="mim-tip-reference" title="Tranebjaerg, L., Jensen, P. K. A., Van Ghelue, M., Vnencak-Jones, C. L., Sund, S., Elgjo, K., Jakobsen, J., Lindal, S., Warburg, M., Fuglsang-Frederiksen, A., Skullerud, K. &lt;strong&gt;Neuronal cell death in the visual cortex is a prominent feature of the X-linked recessive mitochondrial deafness-dystonia syndrome caused by mutations in the TIMM8a gene.&lt;/strong&gt; Ophthalmic Genet. 22: 207-223, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11803487/&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;11803487&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1076/opge.22.4.207.2220&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="11803487">Tranebjaerg et al. (2001)</a> identified the same mutation in the patient's 21-year-old nephew and considered Jensen syndrome to be the same as Mohr-Tranebjaerg syndrome. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11803487" 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="#11" class="mim-tip-reference" title="Tranebjaerg, L., Hamel, B. C. J., Gabreels, F. J. M., Renier, W. O., Van Ghelue, M. &lt;strong&gt;A de novo missense mutation in a critical domain of the X-linked DDP gene causes the typical deafness-dystonia-optic atrophy syndrome.&lt;/strong&gt; Europ. J. Hum. Genet. 8: 464-467, 2000.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/10878669/&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;10878669&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1038/sj.ejhg.5200483&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="10878669">Tranebjaerg et al. (2000)</a> reported the first de novo mutation in the DDP gene in an 11-year-old Dutch boy with deafness and dystonia. Previously reported mutations had all been frameshifts/nonsense mutations or deletion of the entire gene. In this case a missense mutation (C66W; <a href="/entry/300356#0004">300356.0004</a>) caused an equally severe clinical picture. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10878669" 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="#16" class="mim-tip-reference" title="Ujike, H., Tanabe, Y., Takehisa, Y., Hayabara, T., Kuroda, S. &lt;strong&gt;A family with X-linked dystonia-deafness syndrome with a novel mutation of the DDP gene.&lt;/strong&gt; Arch. Neurol. 58: 1004-1007, 2001.[PubMed: &lt;a href=&quot;https://pubmed.ncbi.nlm.nih.gov/11405816/&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;11405816&lt;/a&gt;] [&lt;a href=&quot;https://doi.org/10.1001/archneur.58.6.1004&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="11405816">Ujike et al. (2001)</a> identified a novel mutation (<a href="/entry/300356#0007">300356.0007</a>) in the DDP gene in 3 individuals in a Japanese family with dystonia-deafness syndrome. <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11405816" 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="Hayes1998" class="mim-anchor"></a>
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Hayes, M. W., Ouvrier, R. A., Evans, W., Somerville, E., Morris, J. G. L.
<strong>X-linked dystonia-deafness syndrome.</strong>
Mov. Disord. 13: 303-308, 1998.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/9539345/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">9539345</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=9539345" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/mds.870130217" target="_blank">Full Text</a>]
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<a id="Jensen1987" class="mim-anchor"></a>
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Jensen, P. K. A., Reske-Nielsen, E., Hein-Sorensen, O., Warburg, M.
<strong>The syndrome of opticoacoustic nerve atrophy with dementia.</strong>
Am. J. Med. Genet. 28: 517-518, 1987.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/3425626/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">3425626</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=3425626" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/ajmg.1320280234" target="_blank">Full Text</a>]
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<a id="Jensen1989" class="mim-anchor"></a>
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Jensen, P. K. A., Reske-Nielsen, E., Hein-Sorensen, O.
<strong>The syndrome of opticoacoustic nerve atrophy with dementia: a new X-linked recessive syndrome with extensive calcifications of the central nervous system. (Abstract)</strong>
Clin. Genet. 35: 222-223, 1989.
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<a id="Jensen1981" class="mim-anchor"></a>
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Jensen, P. K. A.
<strong>Nerve deafness, optic nerve atrophy, and dementia: a new X-linked recessive syndrome?</strong>
Am. J. Med. Genet. 9: 55-60, 1981.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7195649/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7195649</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7195649" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1002/ajmg.1320090110" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="5" class="mim-anchor"></a>
<a id="Jin1996" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D.
<strong>A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.</strong>
Nature Genet. 14: 177-180, 1996.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/8841189/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">8841189</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=8841189" 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/ng1096-177" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="6" class="mim-anchor"></a>
<a id="Koehler1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Koehler, C. M., Leuenberger, D., Merchant, S., Renold, A., Junne, T., Schatz, G.
<strong>Human deafness dystonia syndrome is a mitochondrial disease.</strong>
Proc. Nat. Acad. Sci. 96: 2141-2146, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10051608/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10051608</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=10051608[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=10051608" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1073/pnas.96.5.2141" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="7" class="mim-anchor"></a>
<a id="Mohr1960" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Mohr, J., Mageroy, K.
<strong>Sex-linked deafness of a possibly new type.</strong>
Acta Genet. Statist. Med. 10: 54-62, 1960.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/13771732/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">13771732</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=13771732" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1159/000151118" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="8" class="mim-anchor"></a>
<a id="Pelletier1975" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Pelletier, L., Tanguay, R. B.
<strong>X-linked recessive inheritance of sensorineural hearing loss expressed during adolescence.</strong>
Am. J. Hum. Genet. 27: 609-613, 1975.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/1163535/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">1163535</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=1163535" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="9" class="mim-anchor"></a>
<a id="Roesch2004" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Roesch, K., Hynds, P. J., Varga, R., Tranebjaerg, L., Koehler, C. M.
<strong>The calcium-binding aspartate/glutamate carriers, citrin and aralar1, are new substrates for the DDP1/TIMM8a-TIMM13 complex.</strong>
Hum. Molec. Genet. 13: 2101-2111, 2004.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/15254020/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">15254020</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=15254020" 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/ddh217" target="_blank">Full Text</a>]
</p>
</div>
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<a id="10" class="mim-anchor"></a>
<a id="Scribanu1976" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Scribanu, N., Kennedy, C.
<strong>Familial syndrome with dystonia, neural deafness, and possible intellectual impairment: clinical course and pathological findings.</strong>
Adv. Neurol. 14: 235-243, 1976.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/181965/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">181965</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=181965" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
</p>
</div>
</li>
<li>
<a id="11" class="mim-anchor"></a>
<a id="Tranebjaerg2000" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tranebjaerg, L., Hamel, B. C. J., Gabreels, F. J. M., Renier, W. O., Van Ghelue, M.
<strong>A de novo missense mutation in a critical domain of the X-linked DDP gene causes the typical deafness-dystonia-optic atrophy syndrome.</strong>
Europ. J. Hum. Genet. 8: 464-467, 2000.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10878669/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10878669</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=10878669" 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/sj.ejhg.5200483" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="12" class="mim-anchor"></a>
<a id="Tranebjaerg2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tranebjaerg, L., Jensen, P. K. A., Van Ghelue, M., Vnencak-Jones, C. L., Sund, S., Elgjo, K., Jakobsen, J., Lindal, S., Warburg, M., Fuglsang-Frederiksen, A., Skullerud, K.
<strong>Neuronal cell death in the visual cortex is a prominent feature of the X-linked recessive mitochondrial deafness-dystonia syndrome caused by mutations in the TIMM8a gene.</strong>
Ophthalmic Genet. 22: 207-223, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11803487/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11803487</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11803487" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1076/opge.22.4.207.2220" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="13" class="mim-anchor"></a>
<a id="Tranebjaerg1995" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tranebjaerg, L., Schwartz, C., Eriksen, H., Andreasson, S., Ponjavic, V., Dahl, A., Stevenson, R. E., May, M., Arena, F., Barker, D., Elverland, H. H., Lubs, H.
<strong>A new X linked recessive deafness syndrome with blindness, dystonia, fractures, and mental deficiency is linked to Xq22.</strong>
J. Med. Genet. 32: 257-263, 1995.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/7643352/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">7643352</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=7643352" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1136/jmg.32.4.257" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="14" class="mim-anchor"></a>
<a id="Tranebjaerg1992" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tranebjaerg, L., Schwartz, C., Huggins, K., Barker, D., Stevenson, R., Arena, J. F., Gedde-Dahl, T., Mikkelsen, M., Mellgren, S., Andersen, K., Hansen, E., Dahl, A., Eriksen, H., Lubs, H.
<strong>X-linked recessive mental retardation with progressive sensorineural deafness, blindness, spastic paraplegia and dystonia. (Abstract)</strong>
Am. J. Hum. Genet. 51 (suppl.): A47 only, 1992.
</p>
</div>
</li>
<li>
<a id="15" class="mim-anchor"></a>
<a id="Tranebjaerg1997" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Tranebjaerg, L., van Ghelue, M., Nilssen, O., Hodes, M. E., Dlouhy, S. R., Farlow, M. R., Hamel, B., Arts, W. F. M., Jankovic, J., Beach, J., Jensen, P. K. A.
<strong>Jensen syndrome is allelic to Mohr-Tranebjaerg syndrome and both are caused by stop mutations in the DDP gene. (Abstract)</strong>
Am. J. Hum. Genet. 61 (suppl.): A349 only, 1997.
</p>
</div>
</li>
<li>
<a id="16" class="mim-anchor"></a>
<a id="Ujike2001" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Ujike, H., Tanabe, Y., Takehisa, Y., Hayabara, T., Kuroda, S.
<strong>A family with X-linked dystonia-deafness syndrome with a novel mutation of the DDP gene.</strong>
Arch. Neurol. 58: 1004-1007, 2001.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/11405816/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">11405816</a>, <a href="https://pubmed.ncbi.nlm.nih.gov/?cmd=link&linkname=pubmed_pubmed&from_uid=11405816" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1001/archneur.58.6.1004" target="_blank">Full Text</a>]
</p>
</div>
</li>
<li>
<a id="17" class="mim-anchor"></a>
<a id="Wallace1999" class="mim-anchor"></a>
<div class="">
<p class="mim-text-font">
Wallace, D. C., Murdock, D. G.
<strong>Mitochondria and dystonia: the movement disorder connection?</strong>
Proc. Nat. Acad. Sci. 96: 1817-1819, 1999.
[PubMed: <a href="https://pubmed.ncbi.nlm.nih.gov/10051550/" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">10051550</a>, <a href="https://www.ncbi.nlm.nih.gov/pmc/?term=10051550[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=10051550" target="_blank" onclick="gtag('event', 'mim_outbound', {'name': 'PubMed Related', 'domain': 'pubmed.ncbi.nlm.nih.gov'})">related citations</a>]
[<a href="https://doi.org/10.1073/pnas.96.5.1817" target="_blank">Full Text</a>]
</p>
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<a id="contributors" class="mim-anchor"></a>
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<a href="#mimCollapseContributors" role="button" data-toggle="collapse"> Contributors: </a>
</span>
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<div class="col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
Carol A. Bocchini - updated : 4/20/2016
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<div class="row collapse" id="mimCollapseContributors">
<div class="col-lg-offset-2 col-md-offset-4 col-sm-offset-4 col-xs-offset-2 col-lg-6 col-md-6 col-sm-6 col-xs-6">
<span class="mim-text-font">
George E. Tiller - updated : 3/23/2007<br>Cassandra L. Kniffin - updated : 9/27/2002<br>Cassandra L. Kniffin - reorganized : 8/27/2002<br>Victor A. McKusick - updated : 11/1/2000<br>Victor A. McKusick - updated : 3/23/1999<br>Victor A. McKusick - updated : 5/6/1998<br>Victor A. McKusick - updated : 10/24/1997
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<a id="creationDate" class="mim-anchor"></a>
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Creation Date:
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Victor A. McKusick : 6/4/1986
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<a id="editHistory" class="mim-anchor"></a>
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<div class="col-lg-2 col-md-2 col-sm-4 col-xs-4">
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<a href="#mimCollapseEditHistory" role="button" data-toggle="collapse"> Edit History: </a>
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carol : 08/14/2023
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<div class="col-lg-offset-2 col-md-offset-2 col-sm-offset-4 col-xs-offset-4 col-lg-6 col-md-6 col-sm-6 col-xs-6">
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ckniffin : 08/14/2023<br>carol : 07/11/2023<br>carol : 04/20/2016<br>carol : 4/14/2016<br>carol : 3/26/2012<br>wwang : 7/2/2008<br>wwang : 3/23/2007<br>terry : 6/2/2004<br>terry : 2/19/2004<br>carol : 9/27/2002<br>carol : 9/27/2002<br>ckniffin : 9/27/2002<br>carol : 8/27/2002<br>ckniffin : 8/23/2002<br>carol : 3/19/2002<br>carol : 8/24/2001<br>carol : 8/24/2001<br>mcapotos : 11/8/2000<br>mcapotos : 11/7/2000<br>terry : 11/1/2000<br>carol : 6/20/2000<br>carol : 12/15/1999<br>carol : 4/9/1999<br>mgross : 4/8/1999<br>mgross : 4/5/1999<br>terry : 3/23/1999<br>dkim : 11/13/1998<br>carol : 5/13/1998<br>terry : 5/6/1998<br>terry : 11/12/1997<br>terry : 10/28/1997<br>alopez : 10/27/1997<br>terry : 10/24/1997<br>alopez : 7/16/1997<br>jamie : 10/18/1996<br>mark : 10/4/1996<br>terry : 9/27/1996<br>mark : 5/21/1995<br>terry : 1/31/1995<br>mimadm : 2/27/1994<br>carol : 2/24/1993<br>carol : 1/25/1993<br>supermim : 3/17/1992
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<h3>
<span class="mim-font">
<strong>#</strong> 304700
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<h3>
<span class="mim-font">
MOHR-TRANEBJAERG SYNDROME; MTS
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<p>
<span class="mim-font">
<em>Alternative titles; symbols</em>
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<h4>
<span class="mim-font">
DYSTONIA-DEAFNESS SYNDROME, X-LINKED; DDSX<br />
DEAFNESS-DYSTONIA-OPTIC ATROPHY SYNDROME; DDP<br />
DEAFNESS SYNDROME, PROGRESSIVE, WITH BLINDNESS, DYSTONIA, FRACTURES, AND MENTAL DEFICIENCY<br />
OPTICOACOUSTIC NERVE ATROPHY WITH DEMENTIA<br />
JENSEN SYNDROME
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<br />
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<span class="mim-text-font">
<strong>SNOMEDCT:</strong> 702423009; &nbsp;
<strong>ORPHA:</strong> 52368; &nbsp;
<strong>DO:</strong> 0050757; &nbsp;
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<h4>
<span class="mim-font">
<strong>Phenotype-Gene Relationships</strong>
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<div>
<table class="table table-bordered table-condensed small mim-table-padding">
<thead>
<tr class="active">
<th>
Location
</th>
<th>
Phenotype
</th>
<th>
Phenotype <br /> MIM number
</th>
<th>
Inheritance
</th>
<th>
Phenotype <br /> mapping key
</th>
<th>
Gene/Locus
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<th>
Gene/Locus <br /> MIM number
</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<span class="mim-font">
Xq22.1
</span>
</td>
<td>
<span class="mim-font">
Mohr-Tranebjaerg syndrome
</span>
</td>
<td>
<span class="mim-font">
304700
</span>
</td>
<td>
<span class="mim-font">
X-linked recessive
</span>
</td>
<td>
<span class="mim-font">
3
</span>
</td>
<td>
<span class="mim-font">
TIMM8A
</span>
</td>
<td>
<span class="mim-font">
300356
</span>
</td>
</tr>
</tbody>
</table>
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<h4>
<span class="mim-font">
<strong>TEXT</strong>
</span>
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<span class="mim-text-font">
<p>A number sign (#) is used with this entry because Mohr-Tranebjaerg syndrome (MTS) is caused by mutation in the DDP gene (TIMM8A; 300356) on chromosome Xq22.</p>
</span>
<div>
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<h4>
<span class="mim-font">
<strong>Description</strong>
</span>
</h4>
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<span class="mim-text-font">
<p>Mohr-Tranebjaerg syndrome (MTS) is characterized by early childhood onset of postlingual progressive sensorineural deafness followed by progressive dystonia, mental deterioration, cortical blindness, spasticity, and psychiatric manifestations (summary by Ujike et al., 2001). </p>
</span>
<div>
<br />
</div>
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<h4>
<span class="mim-font">
<strong>Clinical Features</strong>
</span>
</h4>
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<span class="mim-text-font">
<p>Mohr and Mageroy (1960) described a Norwegian family in which males in 4 generations were affected with a progressive form of deafness. Sufficient hearing was present at first such that speech developed normally, then deteriorated. Impaired hearing first became evident at age 3 to 5 years. The first individual deduced to be a heterozygous carrier lived in Nordvik, a small fishing village on an island in north Norway, about midway between Narvik and Trondheim. </p><p>Although originally reported as nonsyndromic X-linked recessive deafness, Tranebjaerg et al. (1992) and Tranebjaerg et al. (1995) found on reinvestigation several ocular features in the family of Mohr and Mageroy (1960), including myopia, decreased visual acuity, constricted visual fields, and abnormal electroretinogram. The deafness was shown to be part of a progressive syndrome that included visual disability leading to cortical blindness, dystonia, fractures, and mental deficiency. </p><p>In 2 and perhaps 3 males in 3 successive generations, connected through possible carrier females, Scribanu and Kennedy (1976) observed dystonia and deafness. Deafness, first recognized at age 2 years in the affected member most fully studied, was progressive. Severe dysarthria, striking deterioration of handwriting, occasional bizarre posturing of head and neck, and hyperactivity were evident by age 8, and he died at age 11. The proband's maternal uncle had onset of deafness at age 6 years, followed by progressive dystonia such that after age 18 years he was unable to walk or talk. He died at age 20. A nephew of the proband, at age 6, has sensorineural deafness but no clear evidence of motor disorder. Pathologic changes were mainly neuronal loss and gliosis in the basal ganglia. </p><p>Pelletier and Tanguay (1975) described a family in which 8 males in 4 generations became deaf in adolescence. </p><p>Jensen (1981) described a 3-year-old boy and his 2 maternal uncles, aged 33 and 41 years, with a seemingly 'new' syndrome characterized by profound sensorineural hearing loss with onset in infancy, followed in adolescence by progressive optic nerve atrophy with loss of vision and in adulthood by progressive dementia. Jensen et al. (1987, 1989) gave follow-up on this Danish family. The new data indicated that the syndrome is a generalized degenerative disease of the central nervous system and strengthened the original proposal that the syndrome is genetic with X-linked recessive inheritance. Both of the uncles died at the age of about 40 years in a state of general deterioration. In one of them the most striking finding at autopsy was the presence of extensive calcification located in all parts of the central nervous system and affecting all structures, including meninges, vessels, and neurons. Calcification was thought to be secondary to the degenerative changes. Moderate diffuse wasting of skeletal muscles was found. Tranebjaerg et al. (2001) studied the affected nephew in this family, who was then 21 years old. He had a cerebral scan at age 9, which showed moderate cortical atrophy. At age 19, he had dysphagia and moderate ataxic gait. There was no dystonia. He was mildly 'demented.' Positron emission tomography scan showed abnormally low uptake by the parietal and temporal lobes, and especially low uptake by the medial and frontal areas of the temporal lobes, similar to the abnormal pattern seen in Alzheimer dementia. Unlike his maternal uncles, he had ophthalmologically normal optic discs and no subjective visual complaints despite progressive visual evoked potential abnormalities. Tranebjaerg et al. (2001) thought that the optic nerve atrophy in the uncles was probably an end-stage expression of a widespread diffuse neuropathy supported by the neuropathologic findings in the family. Based on a comparison of the features in the Danish family, originally thought to have a distinct syndrome called Jensen syndrome, and the features in the original Norwegian family that led to the description of the Mohr-Tranebjaerg syndrome, Tranebjaerg et al. (2001) concluded that the disorders should 'be lumped into one deafness-dystonia-optic neuropathy syndrome.' </p><p>Hayes et al. (1998) used the designation X-linked dystonia-deafness syndrome for the disorder in an Australian family of Anglo-Saxon extraction. The kindred contained 2 pairs of half brothers, each with the same mother. </p><p>Ujike et al. (2001) reported the first non-white family with the disorder, affecting 5 males in 4 generations of a Japanese family. Deafness presented at an early age, followed by varying degrees of dystonia presenting at ages 15 to 30 years. Two individuals had mild mental deterioration, and visual disability was absent in all. </p><p><strong><em>Clinical Variability</em></strong></p><p>
The 3 families in which Jin et al. (1996) demonstrated mutations in the DDP gene (see MOLECULAR GENETICS) displayed overlapping but not identical deafness phenotypes. The disease was most severe in the original Norwegian family, in which mental deterioration and blindness were evident in virtually every affected individual, and least severe in another patient with a large deletion (300356.0006) and his affected relatives who suffered from only deafness and dystonia. However, the mental deterioration and blindness associated with MTS typically occur later in life, and no affected male in the large deletion family had survived beyond the age of 9 years due to the higher morbidity associated with having X-linked agammaglobulinemia. </p>
</span>
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<h4>
<span class="mim-font">
<strong>Inheritance</strong>
</span>
</h4>
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<span class="mim-text-font">
<p>Full studies of the original Norwegian family by Tranebjaerg et al. (1995) indicated that in the 16 affected males in 5 generations, X-linked recessive inheritance and postlingual progressive sensorineural deafness were quite certain. Some obligate carrier females showed signs of minor neuropathy and mild hearing impairment. </p>
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<h4>
<span class="mim-font">
<strong>Mapping</strong>
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</h4>
</div>
<span class="mim-text-font">
<p>Linkage analysis performed by Tranebjaerg et al. (1992) yielded a maximum lod score of 3.96 with DXS17, which is localized to Xq22 and is closely linked to the COL4A5 gene (303630), the site of the mutation in X-linked Alport syndrome (301050). However, there was no family history of renal disease, and in the linkage studies, 1 recombinant with COL4A5 was observed. Linkage analysis by Tranebjaerg et al. (1995) indicated that the locus was linked to DXS101 in Xq22 with a lod score of 5.37 (zero recombination). </p>
</span>
<div>
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</div>
<div>
<h4>
<span class="mim-font">
<strong>Pathogenesis</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Koehler et al. (1999) determined the function of the DDP gene and concluded that the Mohr-Tranebjaerg syndrome is a novel type of mitochondrial disease that is most likely caused by a defective mitochondrial protein-import system. </p><p>Wallace and Murdock (1999) commented that the demonstrated involvement of DDP in the import of mitochondrial proteins implies that the underlying defect of the Mohr-Tranebjaerg syndrome is a defect in mitochondrial oxidative phosphorylation (OXPHOS), specifically due to deficiencies in carrier proteins. They found this conclusion particularly satisfying, since the phenotypes associated with the systemic OXPHOS defects resulting from mutations in mitochondrial DNA give an array of clinical symptoms that overlap with those of the Mohr-Tranebjaerg syndrome. Hence, deafness and dystonia associated with basal ganglia degeneration can now be linked to mitochondrial defects resulting from nuclear DNA as well as mitochondrial DNA mutations. </p><p>The biogenesis of the mitochondrial inner membrane is dependent on 2 distinct 70-kD protein complexes, one of which is formed by TIMM8A and TIMM13 (607383) in the mitochondrial intermembrane space. The TIMM8A/TIMM13 complex facilitates the import of the inner membrane substrate TIMM23 (605034). Roesch et al. (2004) determined that citrin (SLC25A13; 603859) and aralar (SLC25A12; 603667), which are Ca(2+)-binding aspartate/glutamate carriers (AGC) of the mitochondrial inner membrane, are substrates for the TIMM8A/TIMM13 complex. The AGCs function in the aspartate-malate NADH shuttle that moves reducing equivalents from the cytosol to the mitochondrial matrix. A lymphoblast cell line derived from an MTS patient had decreased NADH levels and defects in mitochondrial protein import. Protein expression studies indicated that DDP1 and TIMM13 showed nonuniform expression in mammals, and expression was prominent in the large neurons in the brain, which is in agreement with the expression pattern of SLC25A12. Roesch et al. (2004) hypothesized that insufficient NADH shuttling, linked with changes in Ca(2+) concentration, in sensitive cells of the CNS might contribute to the pathologic process associated with MTS. </p>
</span>
<div>
<br />
</div>
<div>
<h4>
<span class="mim-font">
<strong>Molecular Genetics</strong>
</span>
</h4>
</div>
<span class="mim-text-font">
<p>Using positional information from a patient with sensorineural deafness and dystonia and a 21-kb deletion in Xq22, Jin et al. (1996) characterized a novel transcript lying within the deletion as a candidate for the complex syndrome of Mohr and Tranebjaerg. Jin et al. (1996) suggested that this gene, which they termed DDP (300356), was necessary for normal human neurologic development. </p><p>Jin et al. (1996) determined that the large 21-kb deletion resulted in deletion of the entire DDP gene (300356.0006), as well as disruption of the BTK gene, which is involved in the immunodeficiency X-linked agammaglobulinemia (300755). In 2 additional families, Jin et al. (1996) discovered 2 small deletions in DPP: a 1-bp deletion (300356.0001) in the original Norwegian family and a 10-bp deletion (300356.0002) in a third family with deafness, dystonia, and mental deficiency, but not blindness. </p><p>In a male patient from the Dutch family thought to have a distinct disorder called Jensen syndrome, Tranebjaerg et al. (1997) identified a nonsense mutation in the TIMM8A gene (E24X; 300356.0003). Tranebjaerg et al. (2001) identified the same mutation in the patient's 21-year-old nephew and considered Jensen syndrome to be the same as Mohr-Tranebjaerg syndrome. </p><p>Tranebjaerg et al. (2000) reported the first de novo mutation in the DDP gene in an 11-year-old Dutch boy with deafness and dystonia. Previously reported mutations had all been frameshifts/nonsense mutations or deletion of the entire gene. In this case a missense mutation (C66W; 300356.0004) caused an equally severe clinical picture. </p><p>Ujike et al. (2001) identified a novel mutation (300356.0007) in the DDP gene in 3 individuals in a Japanese family with dystonia-deafness syndrome. </p>
</span>
<div>
<br />
</div>
</div>
<div>
<h4>
<span class="mim-font">
<strong>REFERENCES</strong>
</span>
</h4>
<div>
<p />
</div>
<div>
<ol>
<li>
<p class="mim-text-font">
Hayes, M. W., Ouvrier, R. A., Evans, W., Somerville, E., Morris, J. G. L.
<strong>X-linked dystonia-deafness syndrome.</strong>
Mov. Disord. 13: 303-308, 1998.
[PubMed: 9539345]
[Full Text: https://doi.org/10.1002/mds.870130217]
</p>
</li>
<li>
<p class="mim-text-font">
Jensen, P. K. A., Reske-Nielsen, E., Hein-Sorensen, O., Warburg, M.
<strong>The syndrome of opticoacoustic nerve atrophy with dementia.</strong>
Am. J. Med. Genet. 28: 517-518, 1987.
[PubMed: 3425626]
[Full Text: https://doi.org/10.1002/ajmg.1320280234]
</p>
</li>
<li>
<p class="mim-text-font">
Jensen, P. K. A., Reske-Nielsen, E., Hein-Sorensen, O.
<strong>The syndrome of opticoacoustic nerve atrophy with dementia: a new X-linked recessive syndrome with extensive calcifications of the central nervous system. (Abstract)</strong>
Clin. Genet. 35: 222-223, 1989.
</p>
</li>
<li>
<p class="mim-text-font">
Jensen, P. K. A.
<strong>Nerve deafness, optic nerve atrophy, and dementia: a new X-linked recessive syndrome?</strong>
Am. J. Med. Genet. 9: 55-60, 1981.
[PubMed: 7195649]
[Full Text: https://doi.org/10.1002/ajmg.1320090110]
</p>
</li>
<li>
<p class="mim-text-font">
Jin, H., May, M., Tranebjaerg, L., Kendall, E., Fontan, G., Jackson, J., Subramony, S. H., Arena, F., Lubs, H., Smith, S., Stevenson, R., Schwartz, C., Vetrie, D.
<strong>A novel X-linked gene, DDP, shows mutations in families with deafness (DFN-1), dystonia, mental deficiency and blindness.</strong>
Nature Genet. 14: 177-180, 1996.
[PubMed: 8841189]
[Full Text: https://doi.org/10.1038/ng1096-177]
</p>
</li>
<li>
<p class="mim-text-font">
Koehler, C. M., Leuenberger, D., Merchant, S., Renold, A., Junne, T., Schatz, G.
<strong>Human deafness dystonia syndrome is a mitochondrial disease.</strong>
Proc. Nat. Acad. Sci. 96: 2141-2146, 1999.
[PubMed: 10051608]
[Full Text: https://doi.org/10.1073/pnas.96.5.2141]
</p>
</li>
<li>
<p class="mim-text-font">
Mohr, J., Mageroy, K.
<strong>Sex-linked deafness of a possibly new type.</strong>
Acta Genet. Statist. Med. 10: 54-62, 1960.
[PubMed: 13771732]
[Full Text: https://doi.org/10.1159/000151118]
</p>
</li>
<li>
<p class="mim-text-font">
Pelletier, L., Tanguay, R. B.
<strong>X-linked recessive inheritance of sensorineural hearing loss expressed during adolescence.</strong>
Am. J. Hum. Genet. 27: 609-613, 1975.
[PubMed: 1163535]
</p>
</li>
<li>
<p class="mim-text-font">
Roesch, K., Hynds, P. J., Varga, R., Tranebjaerg, L., Koehler, C. M.
<strong>The calcium-binding aspartate/glutamate carriers, citrin and aralar1, are new substrates for the DDP1/TIMM8a-TIMM13 complex.</strong>
Hum. Molec. Genet. 13: 2101-2111, 2004.
[PubMed: 15254020]
[Full Text: https://doi.org/10.1093/hmg/ddh217]
</p>
</li>
<li>
<p class="mim-text-font">
Scribanu, N., Kennedy, C.
<strong>Familial syndrome with dystonia, neural deafness, and possible intellectual impairment: clinical course and pathological findings.</strong>
Adv. Neurol. 14: 235-243, 1976.
[PubMed: 181965]
</p>
</li>
<li>
<p class="mim-text-font">
Tranebjaerg, L., Hamel, B. C. J., Gabreels, F. J. M., Renier, W. O., Van Ghelue, M.
<strong>A de novo missense mutation in a critical domain of the X-linked DDP gene causes the typical deafness-dystonia-optic atrophy syndrome.</strong>
Europ. J. Hum. Genet. 8: 464-467, 2000.
[PubMed: 10878669]
[Full Text: https://doi.org/10.1038/sj.ejhg.5200483]
</p>
</li>
<li>
<p class="mim-text-font">
Tranebjaerg, L., Jensen, P. K. A., Van Ghelue, M., Vnencak-Jones, C. L., Sund, S., Elgjo, K., Jakobsen, J., Lindal, S., Warburg, M., Fuglsang-Frederiksen, A., Skullerud, K.
<strong>Neuronal cell death in the visual cortex is a prominent feature of the X-linked recessive mitochondrial deafness-dystonia syndrome caused by mutations in the TIMM8a gene.</strong>
Ophthalmic Genet. 22: 207-223, 2001.
[PubMed: 11803487]
[Full Text: https://doi.org/10.1076/opge.22.4.207.2220]
</p>
</li>
<li>
<p class="mim-text-font">
Tranebjaerg, L., Schwartz, C., Eriksen, H., Andreasson, S., Ponjavic, V., Dahl, A., Stevenson, R. E., May, M., Arena, F., Barker, D., Elverland, H. H., Lubs, H.
<strong>A new X linked recessive deafness syndrome with blindness, dystonia, fractures, and mental deficiency is linked to Xq22.</strong>
J. Med. Genet. 32: 257-263, 1995.
[PubMed: 7643352]
[Full Text: https://doi.org/10.1136/jmg.32.4.257]
</p>
</li>
<li>
<p class="mim-text-font">
Tranebjaerg, L., Schwartz, C., Huggins, K., Barker, D., Stevenson, R., Arena, J. F., Gedde-Dahl, T., Mikkelsen, M., Mellgren, S., Andersen, K., Hansen, E., Dahl, A., Eriksen, H., Lubs, H.
<strong>X-linked recessive mental retardation with progressive sensorineural deafness, blindness, spastic paraplegia and dystonia. (Abstract)</strong>
Am. J. Hum. Genet. 51 (suppl.): A47 only, 1992.
</p>
</li>
<li>
<p class="mim-text-font">
Tranebjaerg, L., van Ghelue, M., Nilssen, O., Hodes, M. E., Dlouhy, S. R., Farlow, M. R., Hamel, B., Arts, W. F. M., Jankovic, J., Beach, J., Jensen, P. K. A.
<strong>Jensen syndrome is allelic to Mohr-Tranebjaerg syndrome and both are caused by stop mutations in the DDP gene. (Abstract)</strong>
Am. J. Hum. Genet. 61 (suppl.): A349 only, 1997.
</p>
</li>
<li>
<p class="mim-text-font">
Ujike, H., Tanabe, Y., Takehisa, Y., Hayabara, T., Kuroda, S.
<strong>A family with X-linked dystonia-deafness syndrome with a novel mutation of the DDP gene.</strong>
Arch. Neurol. 58: 1004-1007, 2001.
[PubMed: 11405816]
[Full Text: https://doi.org/10.1001/archneur.58.6.1004]
</p>
</li>
<li>
<p class="mim-text-font">
Wallace, D. C., Murdock, D. G.
<strong>Mitochondria and dystonia: the movement disorder connection?</strong>
Proc. Nat. Acad. Sci. 96: 1817-1819, 1999.
[PubMed: 10051550]
[Full Text: https://doi.org/10.1073/pnas.96.5.1817]
</p>
</li>
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