A fourth subunit is present in cytochrome c oxidase from the thermophilic bacterium PS3
- 26 March 1990
- journal article
- research article
- Published by Wiley in FEBS Letters
- Vol. 262 (2) , 249-252
- https://doi.org/10.1016/0014-5793(90)80202-t
Abstract
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 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.
Keywords
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