Transient and intramembrane trapping of pumped protons in thylakoids

FEBS Letters

Junge, Wolfgang¹  Polle, Andrea¹ 

[1] Ableitung Biophysik, Fachbereich Biologie/Chemie. Universität Osnabrück, Postfach 4469, D-4500 Osnabrück, FRG

关键词: Photosynthesis;    Photosystem II;    Proton pump;    Chemiosmotic hypothesis;    Localized proton;    DCMU;    3-(3;    4-dichlorophenyl)-1;    1-dimethylurea;    DNP-INT;    dinitrophenyl ether of iodonitrothymol;    PS;    photosystem;   

DOI  :  10.1016/0014-5793(86)80417-3

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

We measured flash-induced rapid proton release into the lumen of thylakoids. We found that the proton-trapping domains which were inducible by low concentrations of gramicidin and at alkaline pH [e.g. (1983) Biochim.Biophys.Acta 723, 294-307] were each not restricted to a particular photosystem II complex. Instead, they were delocalized. Oxidizing conditions increased the buffering capacity of the domains from approx. 5 H⁺ per photosystem II more than 2-fold by shifting the pK towards acidity.

【 授权许可】

Unknown