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  • Title: Cox26 is a novel stoichiometric subunit of the yeast cytochrome c oxidase.
    Author: Levchenko M, Wuttke JM, Römpler K, Schmidt B, Neifer K, Juris L, Wissel M, Rehling P, Deckers M.
    Journal: Biochim Biophys Acta; 2016 Jul; 1863(7 Pt A):1624-32. PubMed ID: 27083394.
    Abstract:
    The cytochrome c oxidase (COX) is the terminal enzyme of the respiratory chain. The complex accepts electrons from cytochrome c and passes them onto molecular oxygen. This process contributes to energy capture in the form of a membrane potential across the inner membrane. The enzyme complex assembles in a stepwise process from the three mitochondria-encoded core subunits Cox1, Cox2 and Cox3, which associate with nuclear-encoded subunits and cofactors. In the yeast Saccharomyces cerevisiae, the cytochrome c oxidase associates with the bc1-complex into supercomplexes, allowing efficient energy transduction. Here we report on Cox26 as a protein found in respiratory chain supercomplexes containing cytochrome c oxidase. Our analyses reveal Cox26 as a novel stoichiometric structural subunit of the cytochrome c oxidase. A loss of Cox26 affects cytochrome c oxidase activity and respirasome organization.
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