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Photosynthesis Reaction Mechanism of Photosystem II Protein Studied by Ultrafast Soft X-ray Absorption Spectroscopy

Research Project

Project/Area Number 19H02680
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionInstitute for Molecular Science

Principal Investigator

NAGASAKA Masanari  分子科学研究所, 光分子科学研究領域, 助教 (90455212)

Co-Investigator(Kenkyū-buntansha) 足立 純一  大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 研究機関講師 (10322629)
手老 龍吾  豊橋技術科学大学, 工学(系)研究科(研究院), 准教授 (40390679)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Keywords軟X線吸収分光法 / 光化学系IIタンパク質 / 時間分解測定 / 光合成反応 / 金属錯体 / 液体
Outline of Research at the Start

天然の光合成反応の機構を解明するために、液体試料の軟X線吸収分光(XAS)測定とタンパク質包含脂質二重膜の調製法を組み合わせることで、膜タンパク質である光化学系II (PSII)が機能を発現する状態でのXAS測定を実現する。更に、放射光の軟X線パルスと光学レーザーの同期によるピコ秒時間分解XAS測定手法を開発し、PSIIの光合成反応が進行中のXASスペクトルの時間変化を得る。そして、実験結果を内殻励起計算と比較することで、光合成反応中のPSIIと水の分子間相互作用の時間変化を調べる。

Outline of Final Research Achievements

The purpose of this study is to observe the structure of the oxygen evolving center in the photosystem II (PSII) protein and its molecular interaction with water by using an ultrafast soft X-ray absorption spectroscopy (XAS). We have measured XAS spectra of PSII proteins embedded in lipid bilayers, where PSII proteins are worked as membrane proteins. We have also developed the ultrafast XAS measurement system with the combination of soft X-ray pulses from synchrotron radiation with femto second laser pulses and observed the high spin state of iron phenanthroline complexes with the photoexcitation state by using N K-edge XAS. In the future, we will realize the ultrafast XAS measurement of the PSII protein during the photosynthesis reaction by the combination of our developed techniques.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した光化学系II (PSII)タンパク質の軟X線吸収分光(XAS)法により、膜タンパク質の元素・官能基選択的な電子状態解析が実現する。また、光化学反応の超高速XAS法により、その励起状態解析が行えるので、将来的なPSIIタンパク質の光合成反応の機構解明が期待されるため、その学術的な意義は大きい。また、天然の光合成反応の理解に留まらず、光触媒による人工光合成系の開発につながる可能性もあり、その社会的な意義も大きいと考える。

Report

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

    (33 results)

All 2022 2021 2020 2019

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (26 results) (of which Int'l Joint Research: 6 results,  Invited: 10 results)

  • [Journal Article] X-ray absorption spectra of aqueous cellobiose: Experiment and theory2022

    • Author(s)
      Akazawa Daisuke、Sasaki Takehiko、Nagasaka Masanari、Shiga Motoyuki
    • Journal Title

      The Journal of Chemical Physics

      Volume: 156 Issue: 4 Pages: 044202-044202

    • DOI

      10.1063/5.0078963

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Soft X-ray Absorption Spectroscopy for Observing Element-specific Intermolecular Interaction in Solution Chemistry2021

    • Author(s)
      Nagasaka Masanari、Kosugi Nobuhiro
    • Journal Title

      Chemistry Letters

      Volume: 50 Issue: 5 Pages: 956-964

    • DOI

      10.1246/cl.200938

    • NAID

      130008040383

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Soft X-ray Absorption Spectroscopy of Liquids for Understanding Chemical Processes in Solution2020

    • Author(s)
      NAGASAKA Masanari, YUZAWA Hayato, KOSUGI Nobuhiro
    • Journal Title

      Analytical Sciences

      Volume: 36 Issue: 1 Pages: 95-105

    • DOI

      10.2116/analsci.19R005

    • NAID

      130007783842

    • ISSN
      0910-6340, 1348-2246
    • Year and Date
      2020-01-10
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Soft X-ray absorption spectroscopy in the low-energy region explored using an argon gas window2020

    • Author(s)
      Nagasaka Masanari
    • Journal Title

      Journal of Synchrotron Radiation

      Volume: 27 Issue: 4 Pages: 959-962

    • DOI

      10.1107/s1600577520005883

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Photoelectron based soft x-ray detector for removing high order x rays2020

    • Author(s)
      Nagasaka Masanari, Iwayama Hiroshi
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 8 Pages: 083103-083103

    • DOI

      10.1063/5.0011302

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 精密厚さ制御による液体の軟X線透過吸収分光測定2020

    • Author(s)
      長坂将成, 小杉信博
    • Journal Title

      日本物理学会誌

      Volume: 75 Pages: 496-503

    • NAID

      130007939261

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microheterogeneity in Aqueous Acetonitrile Solution Probed by Soft X-ray Absorption Spectroscopy2020

    • Author(s)
      Nagasaka Masanari, Yuzawa Hayato, Kosugi Nobuhiro
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 124 Issue: 7 Pages: 1259-1265

    • DOI

      10.1021/acs.jpcb.0c00551

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Soft X-ray absorption spectroscopy of liquids for understanding chemical processes in solution2021

    • Author(s)
      Masanari Nagasaka
    • Organizer
      The International Chemical Congress of Pacific Basin Societies 2021 (Pacifichem-2021) "Frontiers of Higher Energy UV Spectroscopy"
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Molecular interactions in aqueous solutions probed by soft X-ray absorption spectroscopy2021

    • Author(s)
      Masanari Nagasaka and Nobuhiro Kosugi
    • Organizer
      The International Chemical Congress of Pacific Basin Societies 2021 (Pacifichem-2021) "Frontiers in the Structure, Properties, and Functions of Molecular Liquids and Solutions"
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 軟X線吸収分光法による溶液反応のオペランド観測2021

    • Author(s)
      長坂将成
    • Organizer
      日本学術振興会69委員会 第2分科会(新素材関連技術) 第74回研究会「機能材料開発を支えるその場(In-situ)・動作環境下(Operando)計測技術の最近の進展」
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 軟X線吸収分光法による溶液の化学現象の解明2021

    • Author(s)
      長坂将成
    • Organizer
      第34回日本放射光学会年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] X線吸収分光法による脂質二重膜へのイオン配位の測定2021

    • Author(s)
      Goh WeiZheng, 長坂将成, 手老龍吾
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] PF 2.5 GeVリングハイブリッドモード運転を活用した軟X線時間分解計測の展開2021

    • Author(s)
      足立純一
    • Organizer
      2020年度量子ビームサイエンスフェスタ
    • Related Report
      2020 Annual Research Report
  • [Presentation] Molecular Interactions in Liquids Probed by Soft X-ray Absorption Spectroscopy in Transmission Mode2020

    • Author(s)
      Masanari Nagasaka
    • Organizer
      Conference on Laser and Synchrotron Radiation Combination Experiment 2020 (LSC 2020), OPTICS & PHOTONICS International Congress 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 放射光を活用した溶液の軟X線吸収分光法の開発と応用2020

    • Author(s)
      長坂将成
    • Organizer
      茨城大学 令和2年度第1回量子線科学セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 軟X線透過アルゴン窓を用いた液体測定への展望2020

    • Author(s)
      長坂将成
    • Organizer
      UVSORシンポジウム2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] 液体の軟X線吸収分光法のバイオ研究への展望2020

    • Author(s)
      長坂将成
    • Organizer
      電気学会 光・量子デバイス研究会「医療・バイオ研究に有効なインターフェースと量子ビーム応用の未来」
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 水溶液中で測定した脂質二重膜のX線吸収スペクトルの帰属2020

    • Author(s)
      Goh WeiZheng, 長坂将成, 手老龍吾
    • Organizer
      電気学会 光・量子デバイス研究会「医療・バイオ研究に有効なインターフェースと量子ビーム応用の未来」
    • Related Report
      2020 Annual Research Report
  • [Presentation] 高次回折光を除去する軟X線検出器の開発2020

    • Author(s)
      長坂将成, 岩山洋士
    • Organizer
      第33回日本放射光学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 磁気軸受型PFハイブリッドモード用パルスセレクターの開発42020

    • Author(s)
      足立純一, 大滝新平, 副島浩一, 田中宏和, 石井晴乃, 小菅隆
    • Organizer
      第33回日本放射光学会年会放射光科学合同シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] Soft X-ray Absorption Spectroscopy of Liquid for Understanding Chemical Processes in Solution2019

    • Author(s)
      Masanari Nagasaka
    • Organizer
      Japan-Korea Molecular Science Symposium "Advances in Materials and Molecular Sciences"
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Intermolecular Interactions Revealed by Precise Energy Shift Analysis in Soft X-ray Absorption Spectroscopy for Liquid2019

    • Author(s)
      Masanari Nagasaka, Nobuhiro Kosugi
    • Organizer
      The 40th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX19)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 軟X線XAFSによる溶液反応のその場観測2019

    • Author(s)
      長坂将成
    • Organizer
      電磁波励起反応場第188委員会 2019年度第1回ワークショップ 「マイクロ波「その場」観察の新展開」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 液体の軟X線吸収分光測定の現状と今後の展望2019

    • Author(s)
      長坂将成
    • Organizer
      第25回HiSOR研究会「小型放射光リングによる多彩な量子ビームの発生と応用」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 軟X線吸収分光法による溶液反応のオペランド観測2019

    • Author(s)
      長坂将成
    • Organizer
      日本表面真空学会 放射光表面科学研究部会「放射光を利用したオペランド表面界面観測の最先端:構造から機能・反応へ」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 軟X線吸収分光法によるアセトニトリル水溶液の微小不均一性の解明2019

    • Author(s)
      長坂将成, 湯沢勇人, 小杉信博
    • Organizer
      第22回XAFS討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 軟X線吸収分光法によるアセトニトリル水溶液の微小不均一性の解明2019

    • Author(s)
      長坂将成, 湯沢勇人, 小杉信博
    • Organizer
      第13回分子科学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 高次回折光を除去する軟X線検出器の開発2019

    • Author(s)
      長坂将成, 岩山洋士
    • Organizer
      UVSORシンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 生体膜モデル系を用いた脂質二重膜へのイオン配位の計測2019

    • Author(s)
      手老 龍吾, Goh WeiZheng, 長坂 将成
    • Organizer
      UVSORシンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 水溶液中での脂質二重膜のX線吸収分光計測2019

    • Author(s)
      Goh WeiZheng, 長坂 将成, 手老 龍吾
    • Organizer
      UVSORシンポジウム2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] 脂質二重膜を構成するリン脂質分子の電子状態計測2019

    • Author(s)
      Goh WeiZheng, 長坂 将成, 中村 慎, 佐野 友美, 手老 龍吾
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] PFハイブリッドモード用磁気軸受軸直交型パルスセレクターの開発2019

    • Author(s)
      田中宏和, 足立純一, 大滝新平, 今井学, 石井晴乃, 小菅隆
    • Organizer
      2019年度KEK技術交流会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Development of pulse selectors for the synchrotron radiation pulses from the Photon Factory 2.5 GeV ring to study multiple photoionization2019

    • Author(s)
      Jun-ichi Adachi, Hirokazu Tanaka, Takashi Kosuge, Haruno Ishii, Isao H. Suzuki, Tatsuo Kaneyasu, Takuro Taniguchi, Takeshi Odagiri, Shinpei Ohtaki, Yuji Tsuji, Koichi Soejima, Pascal Lablanquie, and Y. Hikosaka,
    • Organizer
      International Conference on Photonic, Electronic, and Atomic Collisions
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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

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