Photoelectric studies of the transmembrane charge transfer reactions in photosystem I pigment-protein complexes.
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 c(6)), 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 c(6) 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.
A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia. semenov@genebee.msu.su
Alexey Yu
AY
Semenov
Mahir D
MD
Mamedov
Sergey K
SK
Chamorovsky
D002734:Chlorophyll / Q000737:chemistry / Q000235:genetics; D000458:Cyanobacteria / Q000502:physiology; D004553:Electric Conductivity; D004563:Electrochemistry; D004579:Electron Transport; D008027:Light; D008565:Membrane Proteins / Q000737:chemistry* / Q000378:metabolism*; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry* / Q000378:metabolism*; D013816:Thermodynamics
D008565:Membrane Proteins; D045322:Photosynthetic Reaction Center Complex Proteins; D002734:Chlorophyll