Published in:
01-03-2006 | Original Article
Introducing a novel human mtDNA mutation into the Paracoccus denitrificans COX I gene explains functional deficits in a patient
Authors:
Simona Lucioli, Klaus Hoffmeier, Rosalba Carrozzo, Alessandra Tessa, Bernd Ludwig, Filippo M. Santorelli
Published in:
Neurogenetics
|
Issue 1/2006
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Abstract
We identified a novel mutation (S142F) in the human mtDNA CO I gene in a patient with a clinical phenotype resembling mitochondrial cardioencephalomyopathy. To substantiate pathogenicity, we modeled the identified mutation in the homologous gene in Paracoccus denitrificans and analyzed the biochemical consequences. We observed a deleterious effect on enzyme activity, with a lack of heme a
3
. Taking advantage of the extensive structural homology between the bacterial enzyme and the mammalian core complex, we conclude that the novel S142F mutation is disease-related. This approach can be used in other cases to support the pathogenicity of novel variants in the mitochondrial genome.