The H+/ATP coupling ratio of the ATP synthase from thiol-modulated chloroplasts and two cyanobacterial strains is four

被引：96

作者：

VanWalraven, HS

Strotmann, H

Schwarz, O

Rumberg, B

机构：

[1] UNIV DUSSELDORF,INST BIOCHEM PFLANZEN,D-40225 DUSSELDORF,GERMANY

[2] TECH UNIV BERLIN,MAX VOLMER INST BIOPHYS & PHYS CHEM,D-10623 BERLIN,GERMANY

来源：

FEBS LETTERS | 1996年 / 379卷 / 03期

关键词：

ATP synthase; H+-; energy transduction; proton translocation; proton gradient; H+/ATP ratio; enzyme regulation; chloroplasts; cyanobacteria;

D O I：

10.1016/0014-5793(95)01536-1

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this paper the authors emphasise that the proton translocating ATP synthase from thiol-modulated chloroplasts and two cyanobacterial strains has a coupling ratio of 4 protons per ATP synthesised or hydrolysed, This ratio is determined by several thermodynamic studies at equilibrium between phosphate potential (Delta G(p)) and proton gradient (<Delta(mu)over bar> (H+)>), and is confirmed by measurement of proton flux during ATP hydrolysis, Ratios lower than 4 H+/ATP that have been published in the past have predominantly been determined with the oxidised chloroplast enzyme. Errors in these measurements will be discussed.

引用

页码：309 / 313

页数：5

共 27 条

[1] ENERGY TRANSDUCTION IN PHOTOPHOSPHORYLATION [J].