The structure of a bacterial photosynthetic reaction center
نویسندگان
چکیده
منابع مشابه
Kinetic limitations in turnover of photosynthetic bacterial reaction center protein
The membrane-bound reaction center from purple nonsulfur photosynthetic bacterium Rhodobacter sphaeroides performs light-induced charge separation and exports two molecules of oxidized cytochrome and one molecule of fully reduced quinone (quinol) from two opposite (periplasmic and cytoplasmic) sites of the protein during a single turnover. The rate of the turnover was measured based on cytochro...
متن کاملPhotochemistry of a bacterial photosynthetic reaction center missing the initial bacteriochlorophyll electron acceptor.
A novel chromophore composition of the bacterial photosynthetic reaction center (RC) has been discovered: RCs lacking the L-side monomeric bacteriochlorophyll chromophore result from mutation of the native isoleucine at M204 to glutamine in Rhodobacter capsulatus . This conclusion is obtained from 77 K UV-vis spectroscopy and pigment extractions of the I(M204)Q mutant and seven variants contain...
متن کاملElectron transfer in the photosynthetic reaction center.
Photosynthesis occurs via electron transfer between pigment molecules or prosthetic groups embedded in a thylakoid membrane protein complex. These pigments form the “conductive pathway” for electron flow and the surrounding protein serves as a“shaping insulator”. Electron transfer through the protein proceeds via quantum tunneling into succesively lower potential wells represented by the pigmen...
متن کاملThe bacterial photosynthetic reaction center as a model for membrane proteins.
PERSPECTIVES AND SUMMARY .............................................................. 607 INTRODUCTION ..................................................................................... 609 Notation ............................................................................................. 610 STRUCTURE OF THE RC ......................................................................... 6...
متن کاملRecombination dynamics in bacterial photosynthetic reaction centers.
The time dependence of magnetic field effects on light absorption by triplet-state and radical ions in quinone-depleted reaction centers of Rhodopseudomonas sphaeroides strain R-26 has been investigated. Measurements on the time scale of the hyperfine interaction in the radical pair [(BChl)2+. ...BPh-.)] provided kinetic data characterizing the recombination process. The results have been inter...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 1987
ISSN: 0108-7673
DOI: 10.1107/s0108767387085416