title: Cytochrome c-550 mediates electron transfer from inducible periplasmic c-type cytochromes to the cytoplasmic membrane of Paracoccus denitrificans.
abstract: Electron transfer from periplasmic cytochromes c to the membrane-bound respiratory chain has been studied with the isolated cytochromes and membrane preparations from Paracoccus denitrificans. When reduced cytochromes were incubated with spheroplasts only the constitutive cytochrome c-550 was rapidly oxidized. The inducible cytochromes c-551i and c-553i were not oxidized at appreciable rates. Cytochrome c-550 was able to mediate the transfer of electrons from either cytochrome c-551i or cytochrome c-553i to the membrane preparation.
authors.affiliation: Department of Biochemistry, University of Mississippi Medical Center, Jackson 39216-4505.
authors.forename: V L
authors.initials: VL
authors.lastname: Davidson
authors.forename: M A
authors.initials: MA
authors.lastname: Kumar
mesh_terms: D001426:Bacterial Proteins; D002462:Cell Membrane / Q000378:metabolism*; D003574:Cytochrome c Group / Q000378:metabolism*; D003593:Cytoplasm / Q000378:metabolism*; D004579:Electron Transport; D010084:Oxidation-Reduction; D010231:Paracoccus denitrificans / Q000378:metabolism*; D013053:Spectrophotometry
chemical_list: D001426:Bacterial Proteins; D003574:Cytochrome c Group; C083951:cytochrome c553; C017167:cytochrome C(551); C022302:cytochrome C-552; C031732:cytochrome C-550