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 Citations (Scopus)

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

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Manganese
Liposomes
Membrane Potentials
Protons
Charge transfer
Lasers
Electrons
Membranes
Light
Oxidation
Kinetics
Water
Electric potential

All Science Journal Classification (ASJC) codes

  • Biochemistry

Cite this

Petrova, I. O. ; Kurashov, V. N. ; Zaspa, A. A. ; Semenov, A. Yu ; Mamedov, M. D. / Vectorial charge transfer reactions on the donor side of manganese-depleted and reconstituted photosystem 2 core complexes. In: Biochemistry (Moscow). 2013 ; Vol. 78, No. 4. pp. 395-402.
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Vectorial charge transfer reactions on the donor side of manganese-depleted and reconstituted photosystem 2 core complexes. / Petrova, I. O.; Kurashov, V. N.; Zaspa, A. A.; Semenov, A. Yu; Mamedov, M. D.

In: Biochemistry (Moscow), Vol. 78, No. 4, 01.04.2013, p. 395-402.

Research output: Contribution to journalArticle

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AU - Petrova, I. O.

AU - Kurashov, V. N.

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