Role of ubiquinone in hydrogen-dependent electron transport in Rhizobium japonicum.
Direct evidence for the involvement of ubiquinone in H2 oxidation by Rhizobium japonicum was demonstrated; H2 reduced ca. 80% of the extractable ubiquinone. The inhibitor 2-n-heptyl-4-hydroxyquinoline-N-oxide blocked electron transport at a site between ubiquinone and the cytochromes. The results showed that no cytochrome component mediates electron flow from hydrogen to ubiquinone.
D003580:Cytochromes / Q000378:metabolism; D004579:Electron Transport; D006859:Hydrogen / Q000378:metabolism*; D006912:Hydroxyquinolines / Q000494:pharmacology; D010084:Oxidation-Reduction; D012231:Rhizobium / Q000378:metabolism*; D014451:Ubiquinone / Q000378:metabolism*
D003580:Cytochromes; D006912:Hydroxyquinolines; D014451:Ubiquinone; C001333:2-(n-heptyl)-4-hydroxyquinoline N-oxide; D006859:Hydrogen