Kinetics of the H+‐ATPase in chromatophores from Rhodospirillum rubrum

FEBS Letters

Baltscheffsky, Margareta¹  Boork, Jeff¹  Strid, Ake¹ 

[1] Department of Biochemistry, Arrhenius Laboratory, University of Stockholm, S-106 91 Stockholm, Sweden

关键词: Rhodospirillum rubrum;    H+-ATPase;    Membrane potential;    Enzyme kinetics;    Photophosphorylation;    Protonmotiveforce;   

DOI  :  10.1016/0014-5793(85)81093-0

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The effect of the electrical potential on the H⁺-ATPase of Rhodospirillum rubrum is examined. It is shown that the forward reaction rate (ATP synthesis) is increased by a factor of 10 during illumination while the reversed rate is only slightly decreased. This indicates that the electrical potential across the membrane affects the rate constants mainly by increasing the forward rate constants rather than decreasing the reversed rate constants in order to go from net hydrolysis to net synthesis.

【 授权许可】

Unknown