cd00927: Cyt_c_Oxidase_VIc (this model, PSSM-Id:238467 is obsolete and has been replaced by 438621)
Cytochrome c oxidase subunit VIc. Cytochrome c oxidase (CcO), the terminal oxidase in the respiratory chains of eukaryotes and most bacteria, is a multi-chain transmembrane protein located in the inner membrane of mitochondria and the cell membrane of prokaryotes. It catalyzes the reduction of O2 and simultaneously pumps protons across the membrane. The number of subunits varies from three to five in bacteria and up to 13 in mammalian mitochondria. Subunits I, II, and III of mammalian CcO are encoded within the mitochondrial genome and the remaining 10 subunits are encoded within the nuclear genome. The VIc subunit is found only in eukaryotes and its specific function remains unclear. It has been reported that the relative concentrations of some nuclear encoded CcO subunits, including subunit VIc, compared to those of the mitochondrial encoded subunits, are altered significantly during the progression of prostate cancer.
Jiyao W et al.(2023). "The conserved domain database in 2023.",