title: [On the influence of local molecular environment on the redox potential of electron transfer cofactors in bacterial photosynthetic reaction centers].
abstract: The addition of cryosolvents (glycerol, dimethylsulfoxide) to a water solution containing bacterial photosynthetic reaction centers changes the redox potential of the bacteriochlorophyll dimer, but does not affect the redox potential of the quinone primary acceptor. It has been shown that the change in redox potential can be produced by changes of the electrostatic interactions between cofactors and the local molecular environment modified by additives entered into the solution. The degree of influence of a solvent on the redox potential of various cofactors is determined by degree of availability of these cofactors for molecules of solvent, which depends on the arrangement of cofactors in the structure of reaction centers.
authors.forename: P M
authors.initials: PM
authors.lastname: Krasil'nikov
authors.forename: P P
authors.initials: PP
authors.lastname: Noks
authors.forename: A B
authors.initials: AB
authors.lastname: Rubin
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry*; D001429:Bacteriochlorophylls / Q000737:chemistry*; D003067:Coenzymes / Q000737:chemistry*; D010084:Oxidation-Reduction; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry*; D012242:Rhodobacter sphaeroides / Q000201:enzymology*
chemical_list: D001426:Bacterial Proteins; D001429:Bacteriochlorophylls; D003067:Coenzymes; D045322:Photosynthetic Reaction Center Complex Proteins