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Reviews of topical problems


Physical stage of photosynthesis charge separation

 a,  a, b
a Lomonosov Moscow State University, Belozersky Research Institute of Physico-Chemical Biology, Vorobevy gory, build. A, Moscow, 119899, Russian Federation
b Institute of Fundamental Problems of Biology, Russian Academy of Sciences, Pushchino, Moscow Region, Russian Federation

An analytical review is given of the biophysical aspects of primary light-driven charge separation in photosynthesis reaction centers (RCs), which are special pigment-protein complexes residing in a cell membrane. The primary (physical) stage of charge separation occurs in the pico- and femtosecond ranges and consists in transferring an electron along the active A-branch of pigments. The review presents vast factual material both on the general issues of primary photosynthesis and some more specific topics, including 1) the role of inactive B-branch of pigments, 2) the effect of protein environment on the charge separation, and 3) the participation of monomeric bacteriochlorophyll BA in primary electron acception. It is shown that the electron transfer and stabilization are strongly influenced by crystallographic water and tyrosine M210 molecules from the nearest environment of BA. A connection between the collective nuclear motions and electron transfer at charge separation is shown. The nature of the high quantum efficiency of the primary charge separation reactions is discussed.

Fulltext is available at IOP
Keywords: photosynthesis, reaction center, charge separation, electron transfer
PACS: 87.15.ht, 87.15.M−, 87.15.R− (all)
DOI: 10.3367/UFNe.2016.02.037701
URL: https://ufn.ru/en/articles/2016/6/b/
Citation: Yakovlev A G, Shuvalov V A "Physical stage of photosynthesis charge separation" Phys. Usp. 59 531–557 (2016)
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Received: 19th, October 2015, revised: 28th, January 2016, 2nd, February 2016

Оригинал: Яковлев А Г, Шувалов В А «Физическая стадия разделения зарядов при фотосинтезе» УФН 186 597–625 (2016); DOI: 10.3367/UFNr.2016.02.037701

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