A fourth subunit is present in cytochrome c oxidase from the thermophilic bacterium PS3.
A new putative subunit was found in cytochrome c oxidase (aa3-type) of the thermophilic bacterium PS3. The N-terminal amino acid sequence of this approximately 12 kDa protein coincides with the deduced sequence of an open reading frame found downstream from the gene encoding subunit I of the PS3 cytochrome oxidase [(1988) J. Biochem. 103, 606-610]. This small hydrophobic protein, composed of 109 amino acid residues after the initial methionine residue has been processed, shows homology with the subunit IV (cyoD product) of cytochrome bo-type quinol oxidase of Escherichia coli.
Sone
N
N
Department of Biochemistry, Jichi Medical School, Tochigi, Japan.
Shimada
S
S
Ohmori
T
T
Souma
Y
Y
Gonda
M
M
Ishizuka
M
M
D000595:Amino Acid Sequence; D001407:Bacillus / Q000201:enzymology / Q000235:genetics*; D001483:Base Sequence; D004269:DNA, Bacterial / Q000032:analysis; D003576:Electron Transport Complex IV / Q000235:genetics*; D005798:Genes, Bacterial; D006801:Humans; D007763:Lac Operon; D008928:Mitochondria / Q000201:enzymology; D008969:Molecular Sequence Data; D011487:Protein Conformation
D004269:DNA, Bacterial; D003576:Electron Transport Complex IV