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Literature DB >> 1652472

The cytochrome chain of mitochondria exhibits variable H+/e- stoichiometry.

S Papa¹, N Capitanio, G Capitanio, E De Nitto, M Minuto.

Abstract

A study is presented of the ----H+/e- stoichiometry for H+ pumping by the cytochrome chain in isolated rat liver mitochondria under level-flow and steady-state conditions. It is shown that the ----H+/e- stoichiometry for the cytochrome chain varies under the influence of the flow rate and transmembrane delta microH+. The rate-dependence is shown to be associated with cytochrome c oxidase, whose ----H+/e- ratio varies from 0 to 1, whilst the ----H+/e- ratio for the span covered by cytochrome c reductase is invariably 2.

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Year: 1991 PMID： 1652472 DOI： 10.1016/0014-5793(91)81030-c

Source DB: PubMed Journal: FEBS Lett ISSN： 0014-5793 Impact factor: 4.124

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Cited

11 in total

1. Thyroid status is a key regulator of both flux and efficiency of oxidative phosphorylation in rat hepatocytes.

Authors: Véronique Nogueira; Ludivine Walter; Nicol Avéret; Eric Fontaine; Michel Rigoulet; Xavier M Leverve
Journal: J Bioenerg Biomembr Date: 2002-02 Impact factor: 2.945

Review 2. Redox Bohr effects (cooperative coupling) and the role of heme a in the proton pump of cytochrome c oxidase.

Authors: S Papa; N Capitanio
Journal: J Bioenerg Biomembr Date: 1998-02 Impact factor: 2.945

3. Quantitative analysis of some mechanisms affecting the yield of oxidative phosphorylation: dependence upon both fluxes and forces.

Authors: M Rigoulet; X Leverve; E Fontaine; R Ouhabi; B Guérin
Journal: Mol Cell Biochem Date: 1998-07 Impact factor: 3.396

The cytochrome chain of mitochondria exhibits variable H+/e- stoichiometry.

1. Thyroid status is a key regulator of both flux and efficiency of oxidative phosphorylation in rat hepatocytes.

Review 2. Redox Bohr effects (cooperative coupling) and the role of heme a in the proton pump of cytochrome c oxidase.

3. Quantitative analysis of some mechanisms affecting the yield of oxidative phosphorylation: dependence upon both fluxes and forces.

Review 4. Reactive oxygen species, mitochondria, apoptosis and aging.

5. Proton/electron stoichiometry of mitochondrial bc1 complex. Influence of pH and transmembrane delta pH.

Review 6. Mechanistic and phenomenological features of proton pumps in the respiratory chain of mitochondria.

7. Possible proton relay pathways in cytochrome c oxidase.

8. Mitochondrial energy metabolism in a model of undernutrition induced by dexamethasone.

9. Protons, pumps, and potentials: control of cytochrome oxidase.

10. Nitric oxide increases oxidative phosphorylation efficiency.