title: The electron transport chain of Bacterionema matruchotii.
abstract: The membrane fraction of Bacterionema matruchotii contains an electron transport chain with oxidizing activity for NADH and succinate. Respiration was inhibited by KCN, 2-heptyl-4-hydroxyquinoline-N-oxide, UV light irradiation and CO. UV light irradiation, analysis of membrane extracts, and reconstitution of respiration in UV light treated membranes suggested that respiration is mediated by a menaquinone derivative. The membranes contained cytochromes a, b, and c. Inhibition studies and the effect of KCN and CO on the cytochrome spectrum indicated the presence of an a+a3 cytochrome oxidase and cytochrome o. The membrane fraction from cells grown under O2-limiting conditions contained nitrate reductase activity. In B. matruchotii, electron transport is coupled to oxidative phosphorylation as judged by the effects of substrates and inhibitors on the intracellular ATP concentration.
mesh_terms: D000191:Actinomycetaceae / Q000378:metabolism*; D000255:Adenosine Triphosphate / Q000378:metabolism; D017936:Cytochrome a Group; D003573:Cytochrome b Group; D003574:Cytochrome c Group / Q000378:metabolism; D003580:Cytochromes / Q000378:metabolism; D004579:Electron Transport; D003576:Electron Transport Complex IV / Q000378:metabolism; D029968:Escherichia coli Proteins; D009243:NAD / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism; D010085:Oxidative Phosphorylation; D010101:Oxygen Consumption; D014812:Vitamin K / Q000378:metabolism
chemical_list: D017936:Cytochrome a Group; D003573:Cytochrome b Group; D003574:Cytochrome c Group; D003580:Cytochromes; D029968:Escherichia coli Proteins; D009566:Nitrates; D009243:NAD; D014812:Vitamin K; D000255:Adenosine Triphosphate; C017168:cytochrome bo, E coli; D003576:Electron Transport Complex IV