Proton and electron transfer in the acceptor quinone complex of photosynthetic reaction centers from Rhodobacter sphaeroides.

摘要: For twenty years the photosynthetic reaction center (RC) has been premier testing ground for theoretical understanding of electron transfer in aperiodic systems, with special, but not unique, reference to long distance biological transport. In addition known structure, many attributes that make RCs so well suited studying function equally any charge movement, including protons. These include presence intrinsic reporter groups (electrochromically active pigments), high time resolution through light activation, and a large number variety distinct reactions, ranging from loosely coupled responses protein dielectric specific, proton transfers out sites, bond making terminal chemical transformations. A wide biophysical methods have site directed mutagenesis reveal mechanisms uptake, chemistry RC. This review summarizes our progress date, which suggests RC can serve as paradigm, only energy coupled, membrane proteins, electrostatic properties proteins are critical their general function.