Theoretical study on dynamics of electron carriers in photosynthesis stressed by light irradiation
| Project/Area Number |
26400429
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biological physics/Chemical physics/Soft matter physics
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| Research Institution | Kanazawa University |
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Principal Investigator |
Nagao Hidemi 金沢大学, 数物科学系, 教授 (30291892)
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| 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)
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| Research Collaborator |
NAKAGAWA Satoshi
Kurniawan Isman
Saleh Arwansyah
KODAMA Koichi
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| 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 / 酸化還元電位 / シトクロムb6/f |
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| 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.
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Report
(5 results)
Research Products
(55 results)
