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Dynamics of the structure and function of photosystem I complex in response to environmental changes

Research Project

Project/Area Number 21H02510
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 44030:Plant molecular biology and physiology-related
Research InstitutionOkayama University

Principal Investigator

Takahashi Yuichiro  岡山大学, 異分野基礎科学研究所, 特任教授 (50183447)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2021: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords光合成 / 環境変動 / ダイナミクス / 分子集合因子 / 光化学系Ⅰ複合体 / アンテナ複合体 / プルダウン実験 / 緑藻クラミドモナス / 光化学系 / 分子集合 / 構造解析 / 環境順化 / 分集合因子
Outline of Research at the Start

酸素発生型光合成反応で最も特徴的かつ重要な反応は、光化学系ⅠとⅡ(PSIとPSII)が担う光エネルギーの捕集と光化学反応である。PSIはおよそ20のサブユニットと200ほどのコファクターから構成される葉緑体に存在する最も大きな複合体の一つで、その構造が原子レベルで明らかにされてきた。しかし、PSI構成サブユニットが機能的な複合体へ分子集合する過程は不明な点が多く残されている。本研究では、葉緑体および核ゲノムの形質転換系が確立している緑藻 クラミドモナスを利用し、PSI複合体の構造と機能のダイナミクスな分子集合機構を解明し、変動する光環境下に馴化して効率的に光合成が進む分子機構を解明する。

Outline of Final Research Achievements

The functions of four photosystem I (PSI) complex assembly factors Ycf3, Y3IP1, Ycf4, CGL71, and those of cpSRP43 and Alb3.1, which are essential for the LHCs, are studied. Ycf3 and Y3IP1, which form heterodimers, are essential for the initial assembly of PSI reaction centers (RC), Ycf4, which forms oligomers, is essential for the subsequent molecular assembly process. CGL71 is important for the PSI complex assembly under aerobic conditions. cpSRP43 and Alb3.1 form a complex and are essential for LHCI complex assembly and are involved in the formation of the PSI-LHCI supercomplex.

Academic Significance and Societal Importance of the Research Achievements

光化学系Ⅰ(PSI)複合体の構成成分であるタンパク質サブユニットの合成とコファクターの生合成は解析が進んでいる。また、PSI複合体の構造は構造生物学的手法で詳細に解析され、各成分が秩序正しく配置されていることが明らかにされた。さらに、物理化学的解析により、PSI複合体の機能もかなり解明されてきた。しかし、これらの成分ががどのように機能的な複合体に分子集合する機構はほとんど明らかにされていなかった。本研究成果により、PSI-LHCI超複合体の分子集合機構に重要な役割を果たす分子集合因子の機能が明らかにされた。今後、過酷な環境に耐性を示す光合成生物を作出する上で重要な基盤的成果となると言える。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (28 results)

All 2023 2022 2021 Other

All Int'l Joint Research (9 results) Journal Article (8 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Int'l Joint Research] ミュンスター大学(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] カリフォルニア大学バークレー校(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ハイデラバード大学(インド)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] オックスフォード大学(英国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Muenster(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Carnegie Institution for Science(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Hyderabad(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] IBPC(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Stockholm University(スウェーデン)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Photosynthesis: Light Harvesting2023

    • Author(s)
      4.Roberta Croce and Yuichiro Takahashi
    • Journal Title

      The Chlamydomonas Sourcebook

      Volume: 1 Pages: 509-524

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Two specific domains of the γ subunit of chloroplast F <sub>o</sub> F <sub>1</sub> provide redox regulation of the ATP synthesis through conformational changes2023

    • Author(s)
      Akiyama Kentaro、Ozawa Shin-Ichiro、Takahashi Yuichiro、Yoshida Keisuke、Suzuki Toshiharu、Kondo Kumiko、Wakabayashi Ken-ichi、Hisabori Toru
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 120 Issue: 6

    • DOI

      10.1073/pnas.2218187120

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Characterization of tryptophan oxidation affecting D1 degradation by FtsH in the photosystem II quality control of chloroplasts2023

    • Author(s)
      Kato Yusuke、Kuroda Hiroshi、Ozawa Shin-Ichiro、Saito Keisuke、Dogra Vivek、Scholz Martin、Zhang Guoxian、de Vitry Catherine、Ishikita Hiroshi、Kim Chanhong、Hippler Michael、Takahashi Yuichiro、Sakamoto Wataru
    • Journal Title

      eLife

      Volume: 12

    • DOI

      10.7554/elife.88822.3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Algal PETC-Pro171-Leu suppresses electron transfer in cytochrome<i>b</i>6<i>f</i>under acidic lumenal conditions2023

    • Author(s)
      Ozawa Shin-Ichiro、Buchert Felix、Reuys Ruby、Hippler Michael、Takahashi Yuichiro
    • Journal Title

      Plant Physiology

      Volume: 191 Issue: 3 Pages: 1803-1817

    • DOI

      10.1093/plphys/kiac575

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Algal photosystem I dimer and high-resolution model of PSI-plastocyanin complex2022

    • Author(s)
      Naschberger Andreas、Mosebach Laura、Tobiasson Victor、Kuhlgert Sebastian、Scholz Martin、Perez-Boerema Annemarie、Ho Thi Thu Hoai、Vidal-Meireles Andr?、Takahashi Yuichiro、Hippler Michael、Amunts Alexey
    • Journal Title

      Nature Plants

      Volume: 8 Issue: 10 Pages: 1191-1201

    • DOI

      10.1038/s41477-022-01253-4

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Proton transfer pathway from the oxygen-evolving complex in photosystem II substantiated by extensive mutagenesis2021

    • Author(s)
      Kuroda Hiroshi、Kawashima Keisuke、Ueda Kazuyo、Ikeda Takuya、Saito Keisuke、Ninomiya Ryo、Hida Chisato、Takahashi Yuichiro、Ishikita Hiroshi
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Bioenergetics

      Volume: 1862 Issue: 1 Pages: 148329-148329

    • DOI

      10.1016/j.bbabio.2020.148329

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photosynthesis and Chloroplast Regulation?Balancing Photosynthesis and Photoprotection under Changing Environments2021

    • Author(s)
      Hippler Michael、Minagawa Jun、Takahashi Yuichiro
    • Journal Title

      Plant and Cell Physiology

      Volume: 62 Issue: 7 Pages: 1059-1062

    • DOI

      10.1093/pcp/pcab139

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Assembly Apparatus of Light-Harvesting Complexes: Identification of Alb3.1?cpSRP?LHCP Complexes in the Green Alga <i>Chlamydomonas reinhardtii</i>2021

    • Author(s)
      Rathod Mithun Kumar、Nellaepalli Sreedhar、Ozawa Shin-Ichiro、Kuroda Hiroshi、Kodama Natsumi、Bujaldon Sandrine、Wollman Francis-Andr?、Takahashi Yuichiro
    • Journal Title

      Plant and Cell Physiology

      Volume: 63 Issue: 1 Pages: 70-81

    • DOI

      10.1093/pcp/pcab146

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ゲラニルゲラニルクロロフィルをむつクロロフィルタンパク複合体の解析2023

    • Author(s)
      Kodru Sireesha, Nellaepalli Sreedhar, 小澤真一郎、佐藤千紘、黒田洋詩、田中亮一、Niyogi Krishuna, 高橋裕一郎
    • Organizer
      第13回日本光合成学会年会およびシンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] LIL3/GGRを欠損した変異株のクロロフィルタンパク質の機能解析2023

    • Author(s)
      Kodru Sireesha, Nellaepalli Sreedhar, 小澤真一郎、佐藤千紘、黒田洋詩、田中亮一、Niyogi Krishuna, 高橋裕一郎
    • Organizer
      日本植物学会第87回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 光化学系Ⅰ組み立て中間体の光捕集とスペクトルの不均一性2023

    • Author(s)
      柴田穣、金田直也、ネレパリ スリーダー、高橋裕一郎
    • Organizer
      日本植物生理学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Structure and dynamics of photosystem I supercomplex in the green alga Chlamydomonas reinhardtii2022

    • Author(s)
      Yuichiro Takahashi
    • Organizer
      ICFAST-2022(University of Hyderabad, India)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 集光性クロロフィルタンパク質の輸送に関 与する cpSRP43 タンパク質のアフィニ ティ精製2022

    • Author(s)
      黒田洋詩、小澤真一郎、濱尾志乃、高橋裕一郎
    • Organizer
      日本植物学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] How to assemble proteins into a functional multiprotein complex; Factors assisting the assembly of photosystem I supercomplex in the green alga Chlamydomonas reinhardtii2022

    • Author(s)
      Yuichiro Takahashi
    • Organizer
      CTFPPB-2023 (University of Hyderabad, India)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Structure and biogenesis of photosystem I supercomplex in Chlamydomonas reinhardtii2022

    • Author(s)
      Yuichiro Takahashi
    • Organizer
      International Symposium on Photosynthesis and Chloroplast Regulation, Kobe
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 緑藻クラミドモナス集光性クロロフィルタンパク質の輸送に関与するcpSRPのアフィニティ精製2022

    • Author(s)
      黒田洋詩、小澤真一郎、高橋裕一郎
    • Organizer
      日本植物生理学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] The amino acid substitution, PETC-Pro171Leu, slowdown electron transfer in the cytochrome b6f complex under anoxic conditions in the green alga Chlamydomonas reinhardtii2022

    • Author(s)
      Shin-ichiro Ozawa, Felix Buchert, Ruby Reuys, Michel Hippler, Yuichiro Takahashi
    • Organizer
      日本植物生理学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 緑藻クラミドモナスcpSRPはcpSRP43とcpSRP54から構成されるAlb3.1を介してチラコイド膜に結合する2022

    • Author(s)
      黒田洋詩、小澤真一郎、濱尾志乃、高橋裕一郎
    • Organizer
      日本植物生理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 緑藻クラミドモナスのシトクロムb6fのPETC-171-ProをLeuに置換した変異株はルーメン酸性下条件で電子伝達速度を強く抑制する2022

    • Author(s)
      小澤真一郎、ブッハート フェリックス、ルイス ルビー、ミヒャエル ヒップラー、高橋裕一郎
    • Organizer
      日本植物生理学会年会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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