Electron transport and transmembrane proton transfer in photosynthetic systems of oxygenic type in Silico

A. V. Vershubskii, A. N. Tikhonov

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Using a mathematical model of light-induced stages of photosynthesis, which takes into account the key stages of pH-dependent regulation on the acceptor and donor sides of PS I, we analyzed electron and proton transport in chloroplasts of higher plants and in cyanobacterial cells. A comparison of computer simulations with experimental data showed that our model adequately described the complex nonmonotonic kinetics of the light-induced redox transients of P700. Effects of atmospheric gases (CO2 and O2) on the kinetics of photooxidation of P700 and generation of the transmembrane pH difference were studied. We also analyzed how cyclic electron transport influenced the kinetics of electron transfer, intrathylakoid pH, and ATP production. Within the framework of our model, we described the time courses of electron flow through PS II and distribution of electron fluxes on the acceptor side of PS I in chloroplasts and in cyanobacteria. It was demonstrated that contributions of cyclic electron transport and electron flow to O2 (the Mehler reaction) were significant during the initial phase of the induction period, but diminished upon activation of the Calvin-Benson cycle.

Original languageEnglish
Pages (from-to)60-71
Number of pages12
JournalBiophysics
Volume58
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

Electron Transport
Computer Simulation
Protons
Electrons
Photosynthesis
Chloroplasts
Light
Cyanobacteria
Oxidation-Reduction
Theoretical Models
Adenosine Triphosphate
Gases

Keywords

  • chloroplasts
  • cyanobacteria
  • electron transport
  • mathematical modeling

ASJC Scopus subject areas

  • Biophysics

Cite this

Electron transport and transmembrane proton transfer in photosynthetic systems of oxygenic type in Silico. / Vershubskii, A. V.; Tikhonov, A. N.

In: Biophysics, Vol. 58, No. 1, 2013, p. 60-71.

Research output: Contribution to journalArticle

@article{6fa8ab5a10ad450ead04ca25a0df9bbb,
title = "Electron transport and transmembrane proton transfer in photosynthetic systems of oxygenic type in Silico",
abstract = "Using a mathematical model of light-induced stages of photosynthesis, which takes into account the key stages of pH-dependent regulation on the acceptor and donor sides of PS I, we analyzed electron and proton transport in chloroplasts of higher plants and in cyanobacterial cells. A comparison of computer simulations with experimental data showed that our model adequately described the complex nonmonotonic kinetics of the light-induced redox transients of P700. Effects of atmospheric gases (CO2 and O2) on the kinetics of photooxidation of P700 and generation of the transmembrane pH difference were studied. We also analyzed how cyclic electron transport influenced the kinetics of electron transfer, intrathylakoid pH, and ATP production. Within the framework of our model, we described the time courses of electron flow through PS II and distribution of electron fluxes on the acceptor side of PS I in chloroplasts and in cyanobacteria. It was demonstrated that contributions of cyclic electron transport and electron flow to O2 (the Mehler reaction) were significant during the initial phase of the induction period, but diminished upon activation of the Calvin-Benson cycle.",
keywords = "chloroplasts, cyanobacteria, electron transport, mathematical modeling",
author = "Vershubskii, {A. V.} and Tikhonov, {A. N.}",
year = "2013",
doi = "10.1134/S000635091301017X",
language = "English",
volume = "58",
pages = "60--71",
journal = "Biophysics (Russian Federation)",
issn = "0006-3509",
publisher = "Maik Nauka-Interperiodica Publishing",
number = "1",

}

TY - JOUR

T1 - Electron transport and transmembrane proton transfer in photosynthetic systems of oxygenic type in Silico

AU - Vershubskii, A. V.

AU - Tikhonov, A. N.

PY - 2013

Y1 - 2013

N2 - Using a mathematical model of light-induced stages of photosynthesis, which takes into account the key stages of pH-dependent regulation on the acceptor and donor sides of PS I, we analyzed electron and proton transport in chloroplasts of higher plants and in cyanobacterial cells. A comparison of computer simulations with experimental data showed that our model adequately described the complex nonmonotonic kinetics of the light-induced redox transients of P700. Effects of atmospheric gases (CO2 and O2) on the kinetics of photooxidation of P700 and generation of the transmembrane pH difference were studied. We also analyzed how cyclic electron transport influenced the kinetics of electron transfer, intrathylakoid pH, and ATP production. Within the framework of our model, we described the time courses of electron flow through PS II and distribution of electron fluxes on the acceptor side of PS I in chloroplasts and in cyanobacteria. It was demonstrated that contributions of cyclic electron transport and electron flow to O2 (the Mehler reaction) were significant during the initial phase of the induction period, but diminished upon activation of the Calvin-Benson cycle.

AB - Using a mathematical model of light-induced stages of photosynthesis, which takes into account the key stages of pH-dependent regulation on the acceptor and donor sides of PS I, we analyzed electron and proton transport in chloroplasts of higher plants and in cyanobacterial cells. A comparison of computer simulations with experimental data showed that our model adequately described the complex nonmonotonic kinetics of the light-induced redox transients of P700. Effects of atmospheric gases (CO2 and O2) on the kinetics of photooxidation of P700 and generation of the transmembrane pH difference were studied. We also analyzed how cyclic electron transport influenced the kinetics of electron transfer, intrathylakoid pH, and ATP production. Within the framework of our model, we described the time courses of electron flow through PS II and distribution of electron fluxes on the acceptor side of PS I in chloroplasts and in cyanobacteria. It was demonstrated that contributions of cyclic electron transport and electron flow to O2 (the Mehler reaction) were significant during the initial phase of the induction period, but diminished upon activation of the Calvin-Benson cycle.

KW - chloroplasts

KW - cyanobacteria

KW - electron transport

KW - mathematical modeling

UR - http://www.scopus.com/inward/record.url?scp=84876438900&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84876438900&partnerID=8YFLogxK

U2 - 10.1134/S000635091301017X

DO - 10.1134/S000635091301017X

M3 - Article

VL - 58

SP - 60

EP - 71

JO - Biophysics (Russian Federation)

JF - Biophysics (Russian Federation)

SN - 0006-3509

IS - 1

ER -