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Splice mutation in the iron-sulfur cluster scaffold protein ISCU causes myopathy with exercise intolerance
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2008 (Engelska)Ingår i: American Journal of Human Genetics, ISSN 0002-9297, E-ISSN 1537-6605, Vol. 82, nr 3, s. 652-660Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A myopathy with severe exercise intolerance and myoglobinuria has been described in patients from northern Sweden, with associated deficiencies of succinate dehydrogenase and aconitase in skeletal muscle. We identified the gene for the iron-sulfur cluster scaffold protein ISCU as a candidate within a region of shared homozygosity among patients with this disease. We found a single mutation in ISCU that likely strengthens a weak splice acceptor site, with consequent exon retention. A marked reduction of ISCU mRNA and mitochondrial ISCU protein in patient muscle was associated with a decrease in the iron regulatory protein IRP1 and intracellular iron overload in skeletal muscle, consistent with a muscle-specific alteration of iron homeostasis in this disease. ISCU interacts with the Friedreich ataxia gene product frataxin in iron-sulfur cluster biosynthesis. Our results therefore extend the range of known human diseases that are caused by defects in iron-sulfur cluster biogenesis.

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Elsevier, 2008. Vol. 82, nr 3, s. 652-660
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Neurologi
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URN: urn:nbn:se:umu:diva-25315DOI: 10.1016/j.ajhg.2007.12.012PubMedID: 18304497OAI: oai:DiVA.org:umu-25315DiVA, id: diva2:229408
Tillgänglig från: 2009-08-12 Skapad: 2009-08-12 Senast uppdaterad: 2018-06-08Bibliografiskt granskad

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Andersen, Peter M

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