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Eur J Hum Genet. 2002 Feb;10(2):141-4.

Leigh disease associated with a novel mitochondrial DNA ND5 mutation.

Author information

1
Department of Neurology, The Medical School, University of Newcastle upon Tyne, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK. r.w.taylor@newcastle.ac.uk

Abstract

Leigh disease is a genetically heterogeneous, neurodegenerative disorder of childhood that is caused by defects of either the nuclear or mitochondrial genome. Here, we report the molecular genetic findings in a patient with neuropathological hallmarks of Leigh disease and complex I deficiency. Direct sequencing of the seven mitochondrial DNA (mtDNA)-encoded complex I (ND) genes revealed a novel missense mutation (T12706C) in the mitochondrial ND5 gene. The mutation is predicted to change an invariant amino acid in a highly conserved transmembrane helix of the mature polypeptide and was heteroplasmic in both skeletal muscle and cultured skin fibroblasts. The association of the T12706C ND5 mutation with a specific biochemical defect involving complex I is highly suggestive of a pathogenic role for this mutation.

PMID:
11938446
DOI:
10.1038/sj.ejhg.5200773
[Indexed for MEDLINE]
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