O2 reduction by photosystem i involves phylloquinone under steady-state illumination

Marina A. Kozuleva; Anastasia A. Petrova; Mahir D. Mamedov; Alexey Yu Semenov; Boris N. Ivanov

doi:10.1016/j.febslet.2014.10.003

O₂ reduction by photosystem i involves phylloquinone under steady-state illumination

Marina A. Kozuleva^*, Anastasia A. Petrova, Mahir D. Mamedov, Alexey Yu Semenov, Boris N. Ivanov

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

O₂ reduction was investigated in photosystem I (PS I) complexes isolated from cyanobacteria Synechocystis sp. PCC 6803 wild type (WT) and menB mutant strain, which is unable to synthesize phylloquinone and contains plastoquinone at the quinone-binding site A₁. PS I complexes from WT and menB mutant exhibited different dependencies of O₂ reduction on light intensity, namely, the values of O₂ reduction rate in WT did not reach saturation at high intensities, in contrast to the values in menB mutant. The obtained results suggest the immediate phylloquinone involvement in the light-induced O₂ reduction by PS I.

Original language	English
Pages (from-to)	4364-4368
Number of pages	5
Journal	FEBS Letters
Volume	588
Issue number	23
DOIs	https://doi.org/10.1016/j.febslet.2014.10.003
State	Published - 28 Nov 2014
Externally published	Yes

Keywords

Electron transfer
Oxygen reduction
Photosynthesis
Photosystem I
Phylloquinone
Plastoquinone

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10.1016/j.febslet.2014.10.003

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title = "O2 reduction by photosystem i involves phylloquinone under steady-state illumination",

abstract = "O2 reduction was investigated in photosystem I (PS I) complexes isolated from cyanobacteria Synechocystis sp. PCC 6803 wild type (WT) and menB mutant strain, which is unable to synthesize phylloquinone and contains plastoquinone at the quinone-binding site A1. PS I complexes from WT and menB mutant exhibited different dependencies of O2 reduction on light intensity, namely, the values of O2 reduction rate in WT did not reach saturation at high intensities, in contrast to the values in menB mutant. The obtained results suggest the immediate phylloquinone involvement in the light-induced O2 reduction by PS I.",

keywords = "Electron transfer, Oxygen reduction, Photosynthesis, Photosystem I, Phylloquinone, Plastoquinone",

author = "Kozuleva, {Marina A.} and Petrova, {Anastasia A.} and Mamedov, {Mahir D.} and Semenov, {Alexey Yu} and Ivanov, {Boris N.}",

note = "Publisher Copyright: {\textcopyright} 2014 Federation of European Biochemical Societies.",

year = "2014",

month = nov,

day = "28",

doi = "10.1016/j.febslet.2014.10.003",

language = "אנגלית",

volume = "588",

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journal = "FEBS Letters",

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TY - JOUR

T1 - O2 reduction by photosystem i involves phylloquinone under steady-state illumination

AU - Kozuleva, Marina A.

AU - Petrova, Anastasia A.

AU - Mamedov, Mahir D.

AU - Semenov, Alexey Yu

AU - Ivanov, Boris N.

PY - 2014/11/28

Y1 - 2014/11/28

N2 - O2 reduction was investigated in photosystem I (PS I) complexes isolated from cyanobacteria Synechocystis sp. PCC 6803 wild type (WT) and menB mutant strain, which is unable to synthesize phylloquinone and contains plastoquinone at the quinone-binding site A1. PS I complexes from WT and menB mutant exhibited different dependencies of O2 reduction on light intensity, namely, the values of O2 reduction rate in WT did not reach saturation at high intensities, in contrast to the values in menB mutant. The obtained results suggest the immediate phylloquinone involvement in the light-induced O2 reduction by PS I.

AB - O2 reduction was investigated in photosystem I (PS I) complexes isolated from cyanobacteria Synechocystis sp. PCC 6803 wild type (WT) and menB mutant strain, which is unable to synthesize phylloquinone and contains plastoquinone at the quinone-binding site A1. PS I complexes from WT and menB mutant exhibited different dependencies of O2 reduction on light intensity, namely, the values of O2 reduction rate in WT did not reach saturation at high intensities, in contrast to the values in menB mutant. The obtained results suggest the immediate phylloquinone involvement in the light-induced O2 reduction by PS I.

KW - Electron transfer

KW - Oxygen reduction

KW - Photosynthesis

KW - Photosystem I

KW - Phylloquinone

KW - Plastoquinone

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EP - 4368

JO - FEBS Letters

JF - FEBS Letters

IS - 23

ER -

O₂ reduction by photosystem i involves phylloquinone under steady-state illumination

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