Abstract
The reaction of cyanide with oxygenated cytochrome c oxidase was followed by means of flow-flash techniques. The oxygenated form, produced after photolysis of the partially reduced CO complex in the presence of cyanide and O2, shows cyanide-binding properties distinct from those of both the oxidized and the reduced forms of the protein. The binding is a single process (k = 22M-1-S-1) linearly dependent on cyanide concentration to as high as 75 mM. It is suggested that the oxygenated form is a conformational variant of the oxidized protein.
Full text
PDF


Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Davison A. J., Wainio W. W. Reactions of oxygenated cytochrome oxidase. J Biol Chem. 1968 Oct 10;243(19):5023–5027. [PubMed] [Google Scholar]
- Greenwood C., Gibson Q. H. The reaction of reduced cytochrome C oxidase with oxygen. J Biol Chem. 1967 Apr 25;242(8):1782–1787. [PubMed] [Google Scholar]
- Greenwood C., Wilson M. T., Brunori M. Studies on partially reduced mammalian cytochrome oxidase. Reactions with carbon monoxide and oxygen. Biochem J. 1974 Feb;137(2):205–215. doi: 10.1042/bj1370205. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lemberg R., Gilmour M. V. Cytochrome oxidase and its derivatives. 8. Formation and properties of the 'oxygenated' form of cytochrome oxidase and its reconversion to ferrous and ferric oxidase. Biochim Biophys Acta. 1967;143(3):500–517. doi: 10.1016/0005-2728(67)90055-2. [DOI] [PubMed] [Google Scholar]
- Lemberg R., Mansley G. E. Cytochrome oxidase and its derivatives. V. The reaction of ferrous cytochrome c oxidase with oxygen and hydrogen peroxide in the presence of sodium dithionite. Biochim Biophys Acta. 1966 Apr 12;118(1):19–35. doi: 10.1016/s0926-6593(66)80141-8. [DOI] [PubMed] [Google Scholar]
- Lemberg R., Stanbury J. Cytochrome oxidase and its derivatives. VII. Further observations on the compound formed by the reaction of ferrous cytochrome c oxidase with oxygen and hydrogen peroxide and on its reactions. Biochim Biophys Acta. 1967 Jul 5;143(1):37–51. doi: 10.1016/0005-2728(67)90107-7. [DOI] [PubMed] [Google Scholar]
- TAKEMORI S., SEKUZU I., YONETANI T., OKUNUKI K. Reconstruction of the reaction mechanism of cytochrome oxidase. Nature. 1958 Nov 8;182(4645):1306–1307. doi: 10.1038/1821306a0. [DOI] [PubMed] [Google Scholar]
- Tiesjema R. H., Muijsers A. O., van Gelder B. F. Biochemical and biophysical studies on cytochrome aa 3 . IV. Some properties of oxygenated cytochrome aa 3 . Biochim Biophys Acta. 1972 Jan 21;256(1):32–42. doi: 10.1016/0005-2728(72)90160-0. [DOI] [PubMed] [Google Scholar]
- YONETANI T. Studies on cytochrome oxidase. I. Absolute and difference absorption spectra. J Biol Chem. 1960 Mar;235:845–852. [PubMed] [Google Scholar]
- YONETANI T. Studies on cytochrome oxidase. III. Improved preparation and some properties. J Biol Chem. 1961 Jun;236:1680–1688. [PubMed] [Google Scholar]
- van Buuren K. J., Nicholis P., van Gelder B. F. Biochemical and biophysical studies on cytochrome aa 3 . VI. Reaction of cyanide with oxidized and reduced enzyme. Biochim Biophys Acta. 1972 Feb 28;256(2):258–276. doi: 10.1016/0005-2728(72)90057-6. [DOI] [PubMed] [Google Scholar]