• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Functional and structural elucidation of photosynthetic supercomplexes from thermophilic cyanobacteria

Research Project

Project/Area Number 20K06528
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Kawakami Keisuke  国立研究開発法人理化学研究所, 放射光科学研究センター, 研究員 (40619904)

Co-Investigator(Kenkyū-buntansha) 長尾 遼  岡山大学, 異分野基礎科学研究所, 特任講師 (30633961)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords光合成 / 光捕集 / 光エネルギー伝達 / 光化学系 / クライオ電子顕微鏡 / フィコビリソーム / 単粒子解析 / 構造生物化学 / 光エネルギー / 電子顕微鏡
Outline of Research at the Start

シアノバクテリアや紅藻などの藻類は、フィコビリソーム(PBS)と呼ばれる巨大な水溶性アンテナ蛋白質複合体を用いて太陽の光エネルギーを高効率に吸収し、生命活動を行っている。この光エネルギー伝達様式を明らかにすることで、天然光合成の仕組みをより一層理解できるようになる。蛋白質の機能を知るためにはその立体構造を調べる必要があるため、本研究ではクライオ電子顕微鏡解析によってPBSを含む光合成試料の立体構造を解析する。

Outline of Final Research Achievements

Algae on the earth carry out their life through photosynthesis, which utilizes light energy from the sun. Phycobilisome (PBS) is a large water-soluble light-harvesting protein complex that transfers absorbed light energy to photosystem proteins complexes [photosystem I (PSI), photosystem II (PSII)]. The structure of PBS is important for understanding the mechanism of light-harvesting and energy transfer in algae. In this study, the structure of PBS from thermophilic cyanobacteria was analyzed using cryo-electron microscopy to reveal its detailed structure and to elucidate the light-harvesting mechanism of PBS. As a result, I was able to analyze the structure of PBS from thermophilic cyanobacteria at a 3.7-angstrom resolution to reveal its detailed structure, and the energy transfer pathway in PBS was clarified together with spectroscopic analysis (Kawakami et al., BBA, 2020; Hirota et al., Photosynth. Res., 2021; Kawakami et al., Nat. Commun., 2022).

Academic Significance and Societal Importance of the Research Achievements

藻類は太陽の光エネルギーを吸収して光合成を行っている。藻類が持つ巨大な水溶性の光捕集蛋白質フィコビリソーム(PBS)は、吸収した光エネルギーを主に光化学系IIに伝達する。PBSの立体構造とその機能を明らかにすることは、藻類の光捕集・エネルギー伝達の仕組みを理解する上で極めて重要である。本研究によって、PBSの立体構造とその機能を、クライオ電子顕微鏡解析よって明らかにした。
本研究成果は、光合成の初期過程である光エネルギーを吸収する仕組みを解明したものである。藻類の光捕集の仕組みを理解し、この知見を人工光合成研究に取り入れることで、高効率光エネルギー伝達デバイスの開発に貢献できると期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (26 results)

All 2023 2022 2021 2020 Other

All Journal Article (12 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 12 results,  Open Access: 9 results) Presentation (12 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Structure of a monomeric photosystem I core associated with iron-stress-induced-A proteins from Anabaena sp. PCC 71202023

    • Author(s)
      Nagao Ryo、Kato Koji、Hamaguchi Tasuku、Ueno Yoshifumi、Tsuboshita Naoki、Shimizu Shota、Furutani Miyu、Ehira Shigeki、Nakajima Yoshiki、Kawakami Keisuke、Suzuki Takehiro、Dohmae Naoshi、Akimoto Seiji、Yonekura Koji、Shen Jian-Ren
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 920-920

    • DOI

      10.1038/s41467-023-36504-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Exciton quenching by oxidized chlorophyll Z across the two adjacent monomers in a photosystem II core dimer.2022

    • Author(s)
      Ahmed Mohamed, Shunsuke Nishi, Keisuke Kawakami, Jian-Ren Shen, Shigeru Itoh, Hiroshi Fukumura, Yutaka Shibata
    • Journal Title

      Photosynthesis Research

      Volume: 154 Issue: 3 Pages: 277-289

    • DOI

      10.1007/s11120-022-00948-1

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Core and rod structures of a thermophilic cyanobacterial light-harvesting phycobilisome2022

    • Author(s)
      Kawakami Keisuke、Hamaguchi Tasuku、Hirose Yuu、Kosumi Daisuke、Miyata Makoto、Kamiya Nobuo、Yonekura Koji
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 3389-3389

    • DOI

      10.1038/s41467-022-30962-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Theoretical Model of the Far-Red-Light-Adapted Photosystem I Reaction Center of Cyanobacterium <i>Acaryochloris marina</i> Using Chlorophyll <i>d</i> and the Effect of Chlorophyll Exchange2022

    • Author(s)
      Kimura Akihiro、Kitoh-Nishioka Hirotaka、Aota Toshimichi、Hamaguchi Tasuku、Yonekura Koji、Kawakami Keisuke、Shinzawa-Itoh Kyoko、Inoue-Kashino Natsuko、Ifuku Kentaro、Yamashita Eiki、Kashino Yasuhiro、Itoh Shigeru
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 126 Issue: 22 Pages: 4009-4021

    • DOI

      10.1021/acs.jpcb.2c00869

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structural basis for the absence of low-energy chlorophylls in a photosystem I trimer from Gloeobacter violaceus2022

    • Author(s)
      Kato Koji、Hamaguchi Tasuku、Nagao Ryo、Kawakami Keisuke、Ueno Yoshifumi、Suzuki Takehiro、Uchida Hiroko、Murakami Akio、Nakajima Yoshiki、Yokono Makio、Akimoto Seiji、Dohmae Naoshi、Yonekura Koji、Shen Jian-Ren
    • Journal Title

      eLife

      Volume: 11 Pages: 1-34

    • DOI

      10.7554/elife.73990

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chl d を持つ Acaryochloris marina の新型光化学系 I 複合体の構造2022

    • Author(s)
      川上恵典, 伊藤繁, 菓子野康浩
    • Journal Title

      光合成研究

      Volume: 32 Pages: 95-106

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ultrafast energy transfer dynamics of phycobilisome from Thermosynechococcus vulcanus, as revealed by ps fluorescence and fs pump-probe spectroscopies2021

    • Author(s)
      Hirota Yuma、Serikawa Hiroki、Kawakami Keisuke、Ueno Masato、Kamiya Nobuo、Kosumi Daisuke
    • Journal Title

      Photosynthesis Research

      Volume: 148 Issue: 3 Pages: 181-190

    • DOI

      10.1007/s11120-021-00844-0

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Structural implications for a phycobilisome complex from the thermophilic cyanobacterium Thermosynechococcus vulcanus2021

    • Author(s)
      Kawakami Keisuke、Nagao Ryo、Tahara Yuhei O.、Hamaguchi Tasuku、Suzuki Takehiro、Dohmae Naoshi、Kosumi Daisuke、Shen Jian-Ren、Miyata Makoto、Yonekura Koji、Kamiya Nobuo
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Bioenergetics

      Volume: 1862 Issue: 9 Pages: 148458-148458

    • DOI

      10.1016/j.bbabio.2021.148458

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structure of the far-red light utilizing photosystem I of Acaryochloris marina2021

    • Author(s)
      Hamaguchi Tasuku、Kawakami Keisuke、Shinzawa-Itoh Kyoko、Inoue-Kashino Natsuko、Itoh Shigeru、Ifuku Kentaro、Yamashita Eiki、Maeda Kou、Yonekura Koji、Kashino Yasuhiro
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 2333-2333

    • DOI

      10.1038/s41467-021-22502-8

    • NAID

      120007032350

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Design of PG-surfactants bearing polyacrylamide polymer chain to solubilize membrane proteins in a surfactant-free buffer2021

    • Author(s)
      Taro Shimamoto, Tatsuki Nakakubo, Tomoyasu Noji, Shuhei Koeda, Keisuke Kawakami, Nobuo Kamiya, Toshihisa Mizuno
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 4 Pages: 1524-1524

    • DOI

      10.3390/ijms22041524

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photoprotective Capabilities of Light-Harvesting Complex II Trimers in the Green Alga Chlamydomonas reinhardtii2020

    • Author(s)
      Kim Eunchul、Kawakami Keisuke、Sato Ryoichi、Ishii Asako、Minagawa Jun
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 11 Issue: 18 Pages: 7755-7761

    • DOI

      10.1021/acs.jpclett.0c02098

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Photocurrent generation by a photosystem I-NiO photocathode for a p-type biophotovoltaic tandem cell2020

    • Author(s)
      Yuya Takekuma, Nobuhiro Ikeda, Keisuke Kawakami, Nobuo Kamiya, Mamoru Nango, and Morio Nagata
    • Journal Title

      RSC Advances

      Volume: 10 Issue: 27 Pages: 15734-15739

    • DOI

      10.1039/d0ra01793k

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] クライオ電子顕微鏡を用いた光合成 による光エネルギー捕集機構の解明2023

    • Author(s)
      川上恵典
    • Organizer
      多元研イノベーション・エクスチェンジ2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 好熱性シアノバクテリア由来フィコビリソームコアとフィコシアニンロッドのクライオ電子顕微鏡解析2022

    • Author(s)
      川上恵典、浜口祐、広瀬侑、小澄大輔 、宮田真人、神谷信夫、米倉功治
    • Organizer
      光合成セミナー
    • Related Report
      2022 Annual Research Report
  • [Presentation] 立体構造解析に基づいた光合成タンパク質複合体内のカロテノイド同定2022

    • Author(s)
      川上恵典
    • Organizer
      第 34 回カロテノイド研究談話会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 構造解析を行うための、光合成蛋白質試料の純化とその評価2022

    • Author(s)
      川上恵典
    • Organizer
      光合成タンパク質勉強会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Core and rod structures of a thermophilic cyanobacterial light-harvesting phycobilisome2022

    • Author(s)
      Keisuke Kawakami, Tasuku Hamaguchi, Yuu Hirose, Daisuke Kosumi, Makoto Miyata, Nobuo Kamiya, Koji Yonekura
    • Organizer
      10th Asian Biological Inorganic Chemistry Conference (AsBIC10)
    • Related Report
      2022 Annual Research Report
  • [Presentation] 立体構造から見る光合成蛋白質の類似性と多様性2022

    • Author(s)
      川上恵典
    • Organizer
      藍藻の分子生物学2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 巨大アンテナ蛋白質フィコビリソームコアの クライオ電子顕微鏡解析2022

    • Author(s)
      〇川上恵典、浜口祐、広瀬侑、小澄大輔、宮田真人、神谷信夫、米倉功治
    • Organizer
      新学術領域研究第4回最終公開シンポジウム(ハイブリッド)
    • Related Report
      2021 Research-status Report
  • [Presentation] Core structure of a thermophilic cyanobacterial light-harvesting phycobilisome2022

    • Author(s)
      〇川上恵典、浜口祐、広瀬侑、小澄大輔、宮田真人、神谷信夫、米倉功治
    • Organizer
      第63回日本植物生理学会年会(オンライン)
    • Related Report
      2021 Research-status Report
  • [Presentation] Acaryochloris marina由来光化学系I複合体の立体構造解析2021

    • Author(s)
      浜口祐、〇川上恵典、伊藤(新澤)恭子、菓子野(井上)名津子、伊藤繁、 伊福健太郎、山下栄樹、前田皐臣、米倉功治、菓子野康浩
    • Organizer
      第28回「光合成セミナー2021」(オンライン)
    • Related Report
      2021 Research-status Report
  • [Presentation] 巨大アンテナ蛋白質フィコビリソームコアの クライオ電子顕微鏡解析2021

    • Author(s)
      〇川上恵典、浜口祐、広瀬侑、小澄大輔、宮田真人、神谷信夫、米倉功治
    • Organizer
      新学術領域研究 第4回合同班会議
    • Related Report
      2021 Research-status Report
  • [Presentation] 光合成タンパク質の精製 とその立体構造解析2021

    • Author(s)
      川上恵典
    • Organizer
      第1回光合成タンパク質勉強会(オンライン)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 蛋白質複合体の立体構造解析とその評価2021

    • Author(s)
      川上恵典
    • Organizer
      岡山大学資源植物科学研究所共同研究ワークショップ 「多様な光合成研究による植物の環境応答機構解明への挑戦
    • Related Report
      2020 Research-status Report
    • Invited
  • [Book] 光エネルギー変換における分子触媒の新展開2020

    • Author(s)
      日本化学会
    • Total Pages
      224
    • Publisher
      化学同人
    • ISBN
      4759813985
    • Related Report
      2020 Research-status Report
  • [Remarks] 光捕集複合体フィコビリソームの単粒子構造解析

    • URL

      https://www.riken.jp/press/2021/20210610_4/index.html

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi