2013 Fiscal Year Final Research Report
Structure analysis and characterization of the LH1-RC complex induced by metal ions
| Project/Area Number |
23550188
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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 |
Chemistry related to living body
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| Research Institution | Ibaraki University |
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Principal Investigator |
OTOMO Seiu 茨城大学, 理学部, 教授 (10213612)
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| Co-Investigator(Kenkyū-buntansha) |
MIKI Kunio 京都大学, 理学研究科, 教授 (10116105)
KIMURA Yukihiro 神戸大学, 農学研究科, 助教 (20321755)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 光合成 / 光捕集 / 反応中心 / 光電変換 / 色素膜タンパク質 |
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| Research Abstract |
The crystal structure of a bacterial photosynthetic light-harvesting-reaction center core complex (LH1-RC) has been determined. The structure reveals a closed arrangement of LH1 complex around the RC, and the LH1 BChl a molecules form a partially overlapping ring with a shorter Mg-Mg spacing compared with that of B850 in LH2. Structural evidence is for first time provided for the possible ubiquinone pathway in the closed LH1 complex. The Ca2+-binding sites are identified. Molecular mechanisms of quinone transport, Ca2+-regulation and interaction between LH1 and RC are described below. The result has been published in Nature.
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[Journal Article] Structure of the LH1-RC complex from Thermochromatium tepidum at 3.0 Å2014
Author(s)
Niwa, S., Yu, L.-J., Takeda, K., Hirano, Y., Kawakami, T., Wang-Otomo, Z.-Y. & Miki, K.
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Journal Title
Nature
Volume: 508
Pages: 228-232
Peer Reviewed
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[Journal Article] Structure analysis and characterization of the cytochrome c-554 from thermophilic green sulfur photosynthetic bacterium Chloroba- culum tepidum2013
Author(s)
Yu, L.-J., Unno, M., Kimura, Y., Yanagimoto, K., Oh-Oka, H., Wang-Otomo, Z.-Y.
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Journal Title
Photosynth. Res.
Volume: 118
Pages: 249-258
Peer Reviewed
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[Journal Article] Metal cations modulate the bacteriochlorophyll- protein interaction in the light-harvesting 1 core complex from Thermochromatium tepidum2012
Author(s)
Kimura, Y., Inada, Y., Numata, T., Arikawa, T., Li, Y., Zhang, J.-P., Wang(Otomo), Z.-Y. & Ohno, T.
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Journal Title
Biochim. Biophys. Acta
Volume: 1817
Pages: 1022-1029
Peer Reviewed
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[Journal Article] Gene sequencing and characterization of the light-harvesting complex 2 from thermophilic purple sulfur bacterium Thermochromatium tepidum2012
Author(s)
Sekine, F., Horiguchi, K., Kashino, Y., Shimizu, Y., Yu, L.-J., Kobayashi, M. & Wang(Otomo), Z.-Y.
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Journal Title
Photosynth. Res.
Volume: 111
Pages: 9-18
Peer Reviewed
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