Mechanism of charge separation and their stabilization in bacterial reaction centers
Iakovlev, A.G.; Vasil'eva, L.G.; Shkuropatov, A.I.; Bolgarina, T.I.; Shkuropatova, V.A.; Dolgova, T.A.; Shuvalov, V.A.
Biofizika 49(2): 199-211
2004
ISSN/ISBN: 0006-3029 PMID: 15129622 Document Number: 583862
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.