Molecular defects in cytochrome oxidase in mitochondrial diseases.

TitleMolecular defects in cytochrome oxidase in mitochondrial diseases.
Publication TypeJournal Article
Year of Publication1988
AuthorsDiMauro, S, Zeviani, M, Rizzuto, R, Lombès, A, Nakase, H, Bonilla, E, Miranda, A, Schon, E
JournalJ Bioenerg Biomembr
Date Published1988 Jun
KeywordsBrain Diseases, Cytochrome-c Oxidase Deficiency, Electron Transport Complex IV, Humans, Metabolism, Inborn Errors, Mitochondria, Muscular Diseases

Defects of cytochrome c oxidase (COX) show remarkable clinical, biochemical, and genetic heterogeneity. Clinically, there are two main groups of disorders, one dominated by muscle involvement, the other by brain dysfunction. Biochemically, the enzyme defect may be confined to one or a few tissues (reflecting the existence of tissue-specific isozymes) or affect all tissues. Immunologically reactive enzyme protein is decreased in some forms of COX deficiency but not in others. Because COX is encoded both by nuclear and by mitochondrial genes, COX deficiencies may be due to mutations of either genome and may offer useful models to study the communication between nuclei and mitochondria. We have isolated full-length cDNA clones encoding human COX subunits IV, Vb, and VIII and a partial-length clone for subunit Va. These clones are being used as probes to analyze the DNA and RNA of patients with COX deficiency.

Alternate JournalJ. Bioenerg. Biomembr.
Citation Key10.1007/bf00769637
PubMed ID2841309
Grant ListNS 11766 / NS / NINDS NIH HHS / United States