title: [Mechanism of charge separation and their stabilization in bacterial reaction centers].
abstract: The nuclear wavepacket formed by 20-fs excitation on the P* potential energy surface in native and mutant (YM210W and YM210L) reaction centers of Rhodobacter (Rb.) sphaeroides and Chloroflexus (C.) aurantiacus RCs was found to be reversibly transferred to the P+BA- surface at 120, 380, and 640-fs delays (monitored by measurements of BA- absorption at 1020-1028 nm). The reaction centers of YM210W(L) mutant show the most simple pattern of fs oscillations with a period of 230 fs in stimulated emission from P* and in the product P+BA-. The mechanisms of the electron transfer pathway between P* and BA and of the stabilization of the state P+BA- in bacterial reaction centers are discussed.
authors.affiliation: Department of Photobiophysics, Belozerskii Research Institute, Moscow State University, Vorob'evy Gory, 119992 Russia.
authors.forename: A G
authors.initials: AG
authors.lastname: Iakovlev
authors.forename: L G
authors.initials: LG
authors.lastname: Vasil'eva
authors.forename: A Ia
authors.initials: AIa
authors.lastname: Shkuropatov
authors.forename: T I
authors.initials: TI
authors.lastname: Bolgarina
authors.forename: V A
authors.initials: VA
authors.lastname: Shkuropatova
authors.forename: T A
authors.initials: TA
authors.lastname: Dolgova
authors.forename: V A
authors.initials: VA
authors.lastname: Shuvalov
mesh_terms: D041861:Chloroflexus / Q000737:chemistry; D004579:Electron Transport; D007700:Kinetics; D009154:Mutation; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D012242:Rhodobacter sphaeroides / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism; D013053:Spectrophotometry / Q000379:methods; D014443:Tyrosine / Q000737:chemistry / Q000235:genetics
chemical_list: D045322:Photosynthetic Reaction Center Complex Proteins; D014443:Tyrosine