Vectorial charge transfer reactions on the donor side of manganese-depleted and reconstituted photosystem 2 core complexes

I. O. Petrova, V. N. Kurashov, A. A. Zaspa, A. Yu Semenov, M. D. Mamedov

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The light-induced functioning of photosystem 2 (PS 2) is directly linked to the translocation of both electrons and protons across the membrane, which results in the formation of transmembrane electric potential difference (ΔΨ). Generation of ΔΨ due to S-state transitions of the water oxidation complex was demonstrated for the first time in Mn-depleted and reconstituted PS 2 core complexes incorporated into liposomes. The kinetics and relative amplitudes of the electrogenic reactions in dark-adapted samples during S1→S2, S2→S3, and S 4→S0 transitions in response to the first, second and third laser flashes were comparable to those obtained in the intact PS 2 core particles. These results expand current understanding of the nature and mechanisms of electrogenic (vectorial) reactions due to a charge transfer on the donor side of PS 2.

Original languageEnglish (US)
Pages (from-to)395-402
Number of pages8
JournalBiochemistry (Moscow)
Volume78
Issue number4
DOIs
StatePublished - Apr 1 2013

All Science Journal Classification (ASJC) codes

  • Biochemistry

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