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Literature DB >> 6303299

Reactions of cytochrome c oxidase with sodium dithionite.

G D Jones, M G Jones, M T Wilson, M Brunori, A Colosimo, P Sarti.

Abstract

The reduction of cytochrome c oxidase (EC 1.9.3.1) by dithionite was investigated by stopped-flow spectrophotometry and flow-flash techniques in the presence of CO. Of the two haem groups present in the enzyme, that associated with cytochrome alpha is the first reduced. The second-order rate constants for reduction of a number of redox proteins (cytochrome c, stellacyanin and azurin) by the S2O4(2-) and SO2.- anions are reported, and the values are compared with those determined for cytochrome c oxidase. These results are discussed in terms of the accessibility and charge distribution of the electron-entry site of cytochrome c oxidase.

Entities: Chemical Gene

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Year: 1983 PMID： 6303299 PMCID： PMC1154069 DOI： 10.1042/bj2090175

Source DB: PubMed Journal: Biochem J ISSN： 0264-6021 Impact factor: 3.857

20 in total

1. Studies on cytochrome oxidase. I. Absolute and difference absorption spectra.

Authors: T YONETANI
Journal: J Biol Chem Date: 1960-03 Impact factor: 5.157

2. Electron-transfer protein reactivities. Kinetic studies of the oxidation of horse heart cytochrome c, Chromatium vinosum high potential iron-sulfur protein, Pseudomonas aeruginosa azurin, bean plastocyanin, and Rhus vernicifera stellacyanin by pentaamminepyridineruthenium(III).

Authors: D Cummins; H B Gray
Journal: J Am Chem Soc Date: 1977-07-20 Impact factor: 15.419

3. Studies on partially reduced mammalian cytochrome oxidase reactions with ferrocytochrome c.

Authors: C Greenwood; T Brittain
Journal: Biochem J Date: 1976-09-01 Impact factor: 3.857

4. Chromous ion reduction of mammalian cytochrome oxidase and some of its derivatives.

Authors: C Greenwood; T Brittain; M Brunori; M T Wilson
Journal: Biochem J Date: 1977-08-01 Impact factor: 3.857

5. Biochemical and biophysical studies on cytochrome C oxidase. XIV. The reaction with cytochrome as studied by pulse radiolysis.

Authors: J H Van Buuren; B F Van Gelder; J Wilting; R Braams
Journal: Biochim Biophys Acta Date: 1974-03-26

6. The kinetics and mechanism of reduction of electron transfer proteins and other compounds of biological interest by dithionite.

Authors: D O Lambeth; G Palmer
Journal: J Biol Chem Date: 1973-09-10 Impact factor: 5.157

7. Mechanisms of the reactions of cytochrome c. Rate and equilibrium constants for ligand binding to horse heart ferricytochrome c.

Authors: N Sutin; J K Yandell
Journal: J Biol Chem Date: 1972-11-10 Impact factor: 5.157

8. Purification and properties of laccase and stellacyanin from Rhus vernicifera.

Authors: B Reinhammar
Journal: Biochim Biophys Acta Date: 1970-04-07

9. Reduction of ferricytochrome c by dithionite ion: electron transfer by parallel adjacent and remote pathways.

Authors: C Creutz; N Sutin
Journal: Proc Natl Acad Sci U S A Date: 1973-06 Impact factor: 11.205

10. A purification procedure for the soluble cytochrome oxidase and some other respiratory proteins from Pseudomonas aeruginosa.

Authors: S R Parr; D Barber; C Greenwood
Journal: Biochem J Date: 1976-08-01 Impact factor: 3.857

5 in total

Review 1. Determination and novel features of the absolute absorption spectra of the heme a moieties in cytochrome c oxidase.

Authors: Y Orii
Journal: J Bioenerg Biomembr Date: 1998-02 Impact factor: 2.945