Abstract:
:Friedreich's ataxia is due to loss of function mutations in the gene encoding frataxin (FRDA). Frataxin is a protein of unknown function. In situ hybridization analyses revealed that mouse frataxin expression correlates well with the main site of neurodegeneration, but the expression pattern is broader than expected from the pathology of the disease. Frataxin mRNA is predominantly expressed in tissues with a high metabolic rate, including liver, kidney, brown fat and heart. We found that mouse and yeast frataxin homologues contain a potential mitochondrial targeting sequence in their N-terminal domains and that disruption of the yeast gene results in mitochondrial dysfunction. Finally, tagging experiments demonstrate that human frataxin co-localizes with a mitochondrial protein. Friedreich's ataxia is therefore a mitochondrial disease caused by a mutation in the nuclear genome.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Koutnikova H,Campuzano V,Foury F,Dollé P,Cazzalini O,Koenig Mdoi
10.1038/ng0897-345subject
Has Abstractpub_date
1997-08-01 00:00:00pages
345-51issue
4eissn
1061-4036issn
1546-1718journal_volume
16pub_type
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