Cytochrome c oxidase subunit 7B, mitochondrial is an enzyme that in humans is encoded by the COX7Bgene.[1][2]
Cytochrome c oxidase (COX), the terminal component of the mitochondrial respiratory chain, catalyzes the electron transfer from reduced cytochrome c to oxygen. This component is a heteromeric complex consisting of 3 catalytic subunits encoded by mitochondrial genes and multiple structural subunits encoded by nuclear genes. The mitochondrially-encoded subunits function in electron transfer, and the nuclear-encoded subunits may function in the regulation and assembly of the complex. This nuclear gene encodes subunit VIIb, which is highly similar to bovine COX VIIb protein and is found in all tissues. This gene may have several pseudogenes on chromosomes 1, 2, 20 and 22, respectively.[2]
References
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Lenka N, Vijayasarathy C, Mullick J, Avadhani NG (1998). "Structural organization and transcription regulation of nuclear genes encoding the mammalian cytochrome c oxidase complex". Prog. Nucleic Acid Res. Mol. Biol. Progress in Nucleic Acid Research and Molecular Biology. 61: 309–44. doi:10.1016/S0079-6603(08)60830-2. ISBN978-0-12-540061-9. PMID9752724.
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Stroh A, Kadenbach B (1986). "Tissue-specific and species-specific distribution of -SH groups in cytochrome c oxidase subunits". Eur. J. Biochem. 156 (1): 199–204. doi:10.1111/j.1432-1033.1986.tb09568.x. PMID3007143.
Possekel S, Marsac C, Kadenbach B (1996). "Biochemical analysis of fibroblasts from patients with cytochrome c oxidase-associated Leigh syndrome". Biochim. Biophys. Acta. 1316 (3): 153–9. doi:10.1016/0925-4439(96)00005-1. PMID8781533.
Nijtmans LG, Taanman JW, Muijsers AO, et al. (1998). "Assembly of cytochrome-c oxidase in cultured human cells". Eur. J. Biochem. 254 (2): 389–94. doi:10.1046/j.1432-1327.1998.2540389.x. PMID9660196.