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Photoelectric conversion of near infrared light in purple photosynthetic bacteria

Research Project

Project/Area Number 19K06563
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionKobe University

Principal Investigator

Kimura Yukihiro  神戸大学, 農学研究科, 准教授 (20321755)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords光合成 / 近赤外光 / 光電変換 / 紅色細菌 / uphillエネルギー移動 / カルシウム / 紅色光合成細菌 / 光捕集1反応中心複合体 / キノン
Outline of Research at the Start

地上に降り注ぐ太陽光の約4割を占める近赤外光は未利用のエネルギー資源である。原始の光合成生物である紅色光合成細菌は、その巧みなエネルギー変換システムにより、近赤外光エネルギーを有用な化学エネルギーへと変換することができる。本研究では、構造や光エネルギー吸収特性の異なる種々の紅色光合成細菌を研究対象とし、分光学的および熱力学的な実験手法を用いて色素、タンパク質、金属イオン間の相互作用を詳細に解析することにより、紅色光合成細菌における近赤外光電変換の分子メカニズムを明らかにする。

Outline of Final Research Achievements

Purple photosynthetic bacteria carry out photosynthesis by converting near-infrared light, which is unused by plants and cyanobacteria, into useful energy, but the detailed mechanism of this process is remained to be resolved. In the present study, we investigated the light-harvesting 1 reaction center pigment-protein complex (the heart of the purple bacterial photosynthetic reaction) from various purple bacteria using physicochemical approaches to understand (1) why they can utilize low-energy near-infrared light and (2) how they can efficiently convert the energy and obtained important knowledge to understand one part of the mechanism.

Academic Significance and Societal Importance of the Research Achievements

持続可能な社会の構築においてエネルギー資源の問題は最も重要な問題の一つである。近赤外光は地上に降り注ぐ太陽光の約4割を占めるが、そのエネルギーの低さ故に未利用のエネルギー資源となっている。原始の光合成生物である紅色光合成細菌は、この低エネルギーの近赤外光を有用なエネルギーに変換する能力を備えており、そのメカニズムの解明は近赤外応答型人工光合成システム基盤創出の可能性を秘めたおり、エネルギー資源の問題解決に繋がる重要な課題である。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (27 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (6 results) Journal Article (8 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 8 results,  Open Access: 1 results) Presentation (8 results) (of which Invited: 1 results) Remarks (5 results)

  • [Int'l Joint Research] Southern Illinois University(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Photosynthesis Research Center(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Southern Illinois Univ(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Chinese Academy of Sciences(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Southern Illinois Univ(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Braunschweig Univ Technol(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Salt- and pH-Dependent Thermal Stability of Photocomplexes from Extremophilic Bacteriochlorophyll b-Containing Halorhodospira Species2022

    • Author(s)
      Kimura Yukihiro、Nakata Kazuna、Nojima Shingo、Takenaka Shinji、Madigan Michael T.、Wang-Otomo Zheng-Yu
    • Journal Title

      Microorganisms

      Volume: 10 Issue: 5 Pages: 959-959

    • DOI

      10.3390/microorganisms10050959

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of metal-sensitive structural changes in the Ca<sup>2+</sup>-binding photocomplex from <i>Thermochromatium tepidum</i> by isotope-edited vibrational spectroscopy2022

    • Author(s)
      Kimura Yukihiro、Imanishi Michie、Li Yong、Yura Yuki、Ohno Takashi、Saga Yoshitaka、Madigan Michael T.、Wang-Otomo Zheng-Yu
    • Journal Title

      The Journal of Chemical Physics

      Volume: 156 Issue: 10 Pages: 105101-105101

    • DOI

      10.1063/5.0075600

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electrostatic charge controls the lowest LH1 Qy transition energy in the triply extremophilic purple phototrophic bacterium, Halorhodospira halochloris2021

    • Author(s)
      Kimura Yukihiro、Nojima Shingo、Nakata Kazuna、Yamashita Takuya、Wang Xiang-Ping、Takenaka Shinji、Akimoto Seiji、Kobayashi Masayuki、Madigan Michael T.、Wang-Otomo Zheng-Yu、Yu Long-Jiang
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Bioenergetics

      Volume: 1862 Issue: 11 Pages: 148473-148473

    • DOI

      10.1016/j.bbabio.2021.148473

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Spectral Properties of Chlorophyll <i>f</i> in the B800 Cavity of Light‐harvesting Complex 2 from the Purple Photosynthetic Bacterium <i>Rhodoblastus acidophilus</i>2021

    • Author(s)
      Saga Yoshitaka、Tanaka Aiko、Yamashita Madoka、Shinoda Toshiyuki、Tomo Tatsuya、Kimura Yukihiro
    • Journal Title

      Photochemistry and Photobiology

      Volume: 98 Issue: 1 Pages: 169-174

    • DOI

      10.1111/php.13491

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Circular dichroism and resonance Raman spectroscopies of bacteriochlorophyll b-containing LH1-RC complexes2021

    • Author(s)
      Kimura Y.、Yamashita T.、Seto R.、Imanishi M.、Honda M.、Nakagawa S.、Saga Y.、Takenaka S.、Yu L.-J.、Madigan M. T.、Wang-Otomo Z.-Y.
    • Journal Title

      Photosynthesis Research

      Volume: 148 Issue: 1-2 Pages: 77-86

    • DOI

      10.1007/s11120-021-00831-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Quinone transport in the closed light-harvesting 1 reaction center complex from the thermophilic purple bacterium Thermochromatium tepidum2021

    • Author(s)
      Kishi Rikako、Imanishi Michie、Kobayashi Masayuki、Takenaka Shinji、Madigan Michael T.、Wang-Otomo Zheng-Yu、Kimura Yukihiro
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Bioenergetics

      Volume: 1862 Issue: 1 Pages: 148307-148307

    • DOI

      10.1016/j.bbabio.2020.148307

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Lycopene-Family Carotenoids Confer Thermostability on Photocomplexes from a New Thermophilic Purple Bacterium2020

    • Author(s)
      Seto Ryuta、Takaichi Shinichi、Kurihara Toshiyuki、Kishi Rikako、Honda Mai、Takenaka Shinji、Tsukatani Yusuke、Madigan Michael T.、Wang-Otomo Zheng-Yu、Kimura Yukihiro
    • Journal Title

      Biochemistry

      Volume: 59 Issue: 25 Pages: 2351-2358

    • DOI

      10.1021/acs.biochem.0c00192

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A dual role for Ca2+ in expanding the spectral diversity and stability of LH1-RC photocomplexes of purple phototrophic bacteria2019

    • Author(s)
      Imanishi, M., Takenouchi, M., Takaichi, S., Nakagawa, S., Saga, Y., Takenaka, S., Madigan, M.T., vermann, J., Wang-Otomo, Z.-Y., and Kimura Y.
    • Journal Title

      Biochemistry

      Volume: 58 Issue: 25 Pages: 2844-2852

    • DOI

      10.1021/acs.biochem.9b00351

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 紅色光合成細菌のキノン輸送におけるリン脂質の寄与2021

    • Author(s)
      中元陽介, 岸利華子, 竹中慎治, 大友征宇, 木村行宏
    • Organizer
      第28回光合成セミナー:反応中心と色素系の多様性
    • Related Report
      2021 Annual Research Report
  • [Presentation] 3つの好極限性を有する紅色光合成細菌Halorhodospira halochlorisの特性解析2021

    • Author(s)
      中田和菜, 能島紳吾, 山下琢也, 秋本誠志, 小林正幸, 竹中慎治, Madigan, M.T, 大友征宇, 木村行宏
    • Organizer
      第28回光合成セミナー:反応中心と色素系の多様性
    • Related Report
      2021 Annual Research Report
  • [Presentation] 紅色細菌の光捕集複合体の多様性2021

    • Author(s)
      大友征宇,木村行宏
    • Organizer
      日本植物生理学会 第6回光合成細菌ワークショップ
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Spectroscopic characterization of a bacteriochlorophyll b-based LH1-RC complexes from thermophilic purple bacterium Blastochloris tepida2019

    • Author(s)
      Kimura, Y., Seto, R., Kishi, R., Imanishi, M., Takaichi, S., Takenaka, S., Madigan, M.T., and Wang-Otomo, Z.-Y.
    • Organizer
      The 57th Annual Meeting of the BSJ
    • Related Report
      2019 Research-status Report
  • [Presentation] A dual role for calcium in expanding the spectral diversity and stability of LH1-RC photocomplexes of purple phototrophic bacteria2019

    • Author(s)
      Imanishi, M., Takenouchi, M., Takaichi, S., Nakagawa, S., Saga, Y., Takenaka, S., Madigan, M.T., Overmann, J., Wang-Otomo, Z.-Y., and Kimura, Y.
    • Organizer
      The 57th Annual Meeting of the BSJ
    • Related Report
      2019 Research-status Report
  • [Presentation] バクテリオクロロフィルbを有する好熱性紅色細菌Blastochloris tepidaの耐熱性獲得機構2019

    • Author(s)
      瀬戸隆太、川上知朗、岸利華子、今西三千絵、高市真一、竹中慎治、M.T. Madigan、大友征宇、木村行宏
    • Organizer
      日本農芸化学会 関西・中部支部2019合同神戸大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 紅色光合成細菌由来光捕集1反応中心複合体のスペクトル多様性と構造安定性におけるカルシウムイオンの役割2019

    • Author(s)
      今西三千絵、竹之内瑞貴、高市真一、中川支央里、佐賀佳央、竹中慎治、M.T. Madigan、大友征宇、木村行宏
    • Organizer
      第27回光合成セミナー:反応中心と色素系の多様性
    • Related Report
      2019 Research-status Report
  • [Presentation] 新規好熱性紅色細菌Blastochloris tepida由来LH1-RCの耐熱化機構と低エネルギー吸収特性の要因2019

    • Author(s)
      瀬戸隆太、川上知朗、岸利華子、今西三千絵、高市真一、竹中慎治、M.T. Madigan、大友征宇、木村行宏
    • Organizer
      第27回光合成セミナー:反応中心と色素系の多様性
    • Related Report
      2019 Research-status Report
  • [Remarks] 神戸大学大学院農学研究科微生物資源化学研究室ホームページ

    • URL

      http://www.edu.kobe-u.ac.jp/ans-bpc/

    • Related Report
      2021 Annual Research Report
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/read0140338

    • Related Report
      2021 Annual Research Report
  • [Remarks] ResearchGate

    • URL

      https://www.researchgate.net/profile/Yukihiro-Kimura-2

    • Related Report
      2021 Annual Research Report
  • [Remarks]

    • URL

      http://www.edu.kobe-u.ac.jp/ans-bpc/

    • Related Report
      2020 Research-status Report
  • [Remarks]

    • URL

      http://www.edu.kobe-u.ac.jp/ans-bpc/

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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