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2017 Fiscal Year Final Research Report

Theoretical study on dynamics of electron carriers in photosynthesis stressed by light irradiation

Research Project

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Project/Area Number 26400429
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biological physics/Chemical physics/Soft matter physics
Research InstitutionKanazawa University

Principal Investigator

Nagao Hidemi  金沢大学, 数物科学系, 教授 (30291892)

Co-Investigator(Renkei-kenkyūsha) SAITO Hiroaki  金沢大学, 理工研究域数物科学系, 助教 (40506820)
KAWAGUCHI Kazutomo  金沢大学, 理工研究域数物科学系, 助教 (90402429)
Research Collaborator NAKAGAWA Satoshi  
Kurniawan Isman  
Saleh Arwansyah  
KODAMA Koichi  
Project Period (FY) 2014-04-01 – 2018-03-31
Keywords光化学反応 / 電子伝達体 / 会合解離過程 / プラストシアニン / シトクロムf / 拡散過程 / 光照射ストレス
Outline of Final Research Achievements

The association/dissociation process of the electron carriers in photosynthesis has been theoretically and numerically investigated in relation to the diffusion of the proteins. The following main results have been obtained in this study. (1) Free energy profile of plastocyanin, which is one of carriers to bring one electron to cytochrome f, has been calculated by all-atom molecular dynamics simulations. The result suggests that there is no potential barrier for the electron transfer. (2) A novel coarse-grained model describing intermolecular interactions has been proposed, and the results by simulations suggest the positive correlation between the distance between the active sites and the reaction coefficient of the electron transfer. (3) Some simulations for the diffusion of plastocyanin inside the thylakoid lumen suggest that the obstacle by membrane proteins in thylakoid membrane for the electron carrier contribute to the decrease of the activity of the electron transfer.

Free Research Field

生物物理学、理論化学

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Published: 2019-03-29  

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