Photoelectric studies of the transmembrane charge transfer reactions in photosystem I pigment‐protein complexes

FEBS Letters

Semenov, Alexey Yu¹  Chamorovsky, Sergey K²  Mamedov, Mahir D¹ 

[1]A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia

[2]Department of Biophysics, Faculty of Biology, Moscow State University, Moscow, Russia

关键词: Photosynthetic electron transport;    Photosystem I;    Electrogenic phase;    Flash-induced kinetics;    Cyanobacteria;    Dielectric constant;    Pc;    plastocyanin;    PS I;    photosystem I;    cyt;    cytochrome;    P700;    chlorophyll dimer;    FX;    FA;    FB;    4Fe–4S clusters;    Δψ;    transmembrane electric potential difference;    Fd;    ferredoxin;    Fld;    flavodoxin;    A0;    monomeric chlorophyll;    A1;    phylloquinone;    TMPD;    N;    N;    N′;    N′-tetramethyl-p-phenylendiamine;    DCPIP;    2;    6-dichlorophenol-indophenol;    PMS;    phenazine methosulfate;   

DOI  :  10.1016/S0014-5793(03)01032-9

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The results of studies of charge transfer in cyanobacterial photosystem I (PS I) using the photoelectric method are reviewed. The electrogenicity in the PS I complex and its interaction with natural donors (plastocyanin, cytochrome c₆ ), natural acceptors (ferredoxin, flavodoxin), or artificial acceptors and donors (methyl viologen and other redox dyes) were studied. The operating dielectric constant values in the vicinity of the charge transfer carriers in situ were calculated. The profile of distribution of the dielectric constant along the PS I pigment–protein complex (from plastocyanin or cytochrome c₆ through the chlorophyll dimer P700 to the acceptor complex) was estimated, and possible mechanisms of correlation between the local dielectric constant and electron transfer rate constant were discussed.

【 授权许可】

Unknown