[Light-induced oxygen uptake by chromatophores and subchromatophore pigment-protein complexes of Rhodospirillum rubrum].
Chromatophores of R. rubrum incubated with electron donors, e. g. reduced diaminodurene, TMPD, phenazine methosulphate, cytochrome c or ferrocyanide, are able to catalyze O2 uptake upon illumination. This process is inhibited by o-phenanthroline as well as upon extraction of quinones from chromatophores, but not by antimycin A, rotenone or CN-. The O2 uptake sensitive to the action of o-phenanthroline is also observed in the illuminated subchromatophore P870 reaction center complexes and reaction center  plus light-harvesting antenna complexes incubated with electron donors, quinones and detergents. The data obtained are in agreement with a suggestion that the photooxidase activity of chromatophores and subchromatophore pigment-protein complexes is due to the interaction of photoreduced ubiquinone with O2.
D020130:Bacterial Chromatophores / Q000378:metabolism*; D001426:Bacterial Proteins / Q000378:metabolism*; D004579:Electron Transport; D008027:Light; D010101:Oxygen Consumption / Q000187:drug effects; D010860:Pigments, Biological / Q000378:metabolism*; D012247:Rhodospirillum rubrum / Q000378:metabolism* / Q000528:radiation effects; D014451:Ubiquinone / Q000378:metabolism
D001426:Bacterial Proteins; D010860:Pigments, Biological; D014451:Ubiquinone
Fotoindutsirovannoe Pogloshchenie kisloroda khromatoforami i subkhromatofornymi pigment-belkovymi kompleksami Rhodospirillum rubrum.