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Selective IR measurement of chromophore of fluorescent proteins in aqueous solution

Research Project

Project/Area Number 21K14592
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionOkayama University of Science

Principal Investigator

Takahashi Hirona  岡山理科大学, 理学部, 講師 (00803529)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords共鳴IR法 / 蛍光タンパク質 / 発色団 / 赤外分光計測 / 振動緩和過程 / 赤外スペクトル / 蛍光タンパク質発色団 / 過渡蛍光検出赤外分光法 / 顕微鏡技術
Outline of Research at the Start

本研究で「水溶液中における蛍光タンパク質発色団部位の選択的赤外分光計測」を行い、発色団部位のみの局所的な構造解析に取り組む。具体的には申請者らの開発した、過渡蛍光検出赤外(TFD-IR)分光法と顕微鏡技術を組み合わせた共鳴IR法により、①振動数から発色団部位の分子構造を同定する、②信号増強されるバンドから電子励起状態における構造変化を明らかにする、③バンドごとの振動緩和速度から周囲のタンパク質との相互作用を解明する、を行う。発色団部位の分子構造、電子状態および周囲のタンパク質との相互作用が、吸収・発光特性に与える影響を解明し、将来的には新規蛍光タンパク質の設計・開発へのフィードバックを目指す。

Outline of Final Research Achievements

Recently, we have developed the resonance IR spectroscopy for fluorescent molecules in water by combining IR super-resolution technique and transient fluorescence detection IR (TFD-IR) method. In this study, we applied this method to fluorescent protein and succeeded in the selective IR measurement of chromophores. The S/N ratio of IR spectra was quite high although the concentration of fluorescent proteins was small. Because no peak appeared in the amide I region, it is concluded that the selective IR measurement of fluorescent protein chromophore was succeeded in. It was also found the different spectral features of fluorescent proteins, which had similar chromophore. This might come from the difference of the molecular structure of chromophores. In addition, we measured the time profile of the intensity of resonance IR signals and observe the vibrational relaxation process.

Academic Significance and Societal Importance of the Research Achievements

本研究ではTFD-IR分光法と顕微鏡技術を利用した共鳴IR法により、蛍光タンパク質発色団部位の選択的な赤外分光計測法を確立し、発色団の分子構造、電子状態および周囲との相互作用が吸収・発光特性にどのように影響するのか議論を行った。希薄な水溶液中においても高いS/N比で蛍光タンパク質発色団部位の赤外分光計測に成功しているが、これは共鳴IR法でのみ実現できる新規かつ唯一のものであり、従来の振動分光法では達成しえなかった成果である。

Report

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

    (17 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (13 results) (of which Int'l Joint Research: 3 results,  Invited: 6 results)

  • [Journal Article] Identification of a Functionally Efficient and Thermally Stable Outward Sodium-Pumping Rhodopsin (<i>Be</i>NaR) from a Thermophilic Bacterium2023

    • Author(s)
      Kurihara Marie、Thiel Vera、Takahashi Hirona、Kojima Keiichi、Ward David M.、Bryant Donald A.、Sakai Makoto、Yoshizawa Susumu、Sudo Yuki
    • Journal Title

      Chemical and Pharmaceutical Bulletin

      Volume: 71 Issue: 2 Pages: 154-164

    • DOI

      10.1248/cpb.c22-00774

    • ISSN
      0009-2363, 1347-5223
    • Year and Date
      2023-02-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stepwise generation of spin-polarized radicals and their reactions in the photolysis of an oxime ester compound as studied by pulsed EPR spectroscopy2023

    • Author(s)
      Hirona Takahashi, Hiroki Hirano, Akio Kawai
    • Journal Title

      Journal of Photochemistry & Photobiology, A: Chemistry

      Volume: 441 Pages: 114690-114690

    • DOI

      10.1016/j.jphotochem.2023.114690

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Selective IR super-resolution imaging of β-keratins at the bulk or interface in feather detected by using a nonlinear optical process2023

    • Author(s)
      Takahashi Hirona、Katayama Kohei、Sakai Makoto
    • Journal Title

      Biophysical Chemistry

      Volume: 292 Pages: 106935-106935

    • DOI

      10.1016/j.bpc.2022.106935

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pulsed EPR Study of the Initial Steps of Radical-Scavenging Reactions of C70 with Diphenylphosphine Oxide, Hydroxycyclohexyl, and 2-Hydroxypropyl Radicals2022

    • Author(s)
      Hiroki Hirano, Hirona Takahashi, Akio Kawai
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 126 Issue: 32 Pages: 6074-6082

    • DOI

      10.1021/acs.jpcb.2c03398

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Selective IR measurement of chromophore of fluorescent proteins as studied by resonance IR method2023

    • Author(s)
      Hirona Takahashi, Makoto Sakai
    • Organizer
      The 8th Asian Spectroscopy Conference (ASC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Selective IR super-resolution imaging of β-keratins at the bulk or interface in feather detected by a nonlinear optical process2023

    • Author(s)
      Hirona Takahashi, Makoto Sakai
    • Organizer
      The 8th Asian Spectroscopy Conference (ASC2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 共鳴IR法を利用した蛍光タンパク質発色団部位の選択的赤外分光計測2023

    • Author(s)
      高橋広奈, 酒井誠
    • Organizer
      第17回分子科学討論会2023
    • Related Report
      2023 Annual Research Report
  • [Presentation] Novel method for IR measurements of biomolecules by two-color laser spectroscopy2023

    • Author(s)
      Hirona Takahashi
    • Organizer
      Rokkakubashi International;Workshop on Physical Chemistry
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 共鳴IR法による蛍光タンパク質発色団部位の選択的赤外スペクトル測定2023

    • Author(s)
      高橋広奈, 酒井誠
    • Organizer
      2023年日本化学会中国四国支部大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 2種類の赤外超解像顕微鏡を用いた動物毛の内部構造観察2023

    • Author(s)
      古和田丈人, 野津山駿, 高橋広奈, 酒井誠
    • Organizer
      2022年度分光学会生細胞分光部会研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] 赤外超解像顕微鏡による毛髪の内部構造観察―熱処理・化学処理の影響について―2023

    • Author(s)
      岡野夏暉, 石川大翔, 高橋広奈, 酒井誠
    • Organizer
      2022年度分光学会生細胞分光部会研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] 赤外超解像顕微鏡による爪ケラチンタンパク質の分布・配向観察2022

    • Author(s)
      高橋広奈、片山康平、伊田哲也、酒井誠
    • Organizer
      第16回分子科学討論会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 非線形光学過程を利用した2種類の赤外超解像顕微鏡による生体試料の観察2022

    • Author(s)
      高橋広奈、酒井誠
    • Organizer
      第60回日本生物物理学会年会 2022
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 赤外超解像顕微鏡による爪ケラチンタンパク質の分布・配向観察2022

    • Author(s)
      高橋広奈、伊田哲也、片山康平、酒井誠
    • Organizer
      第60回日本生物物理学会年会 2022
    • Related Report
      2022 Research-status Report
  • [Presentation] 赤外光を含む二波長レーザー分光法を使った超解像技術とその応用2022

    • Author(s)
      高橋広奈
    • Organizer
      神戸大セミナー
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 動的スピン分極を利用した光物理や光化学過程の解明2022

    • Author(s)
      高橋広奈
    • Organizer
      第61回電子スピンサイエンス学会年会(SEST2022)
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] IR measurement of fluorescent biological molecules in aqueous solution by resonance IR spectroscopy2021

    • Author(s)
      Hirona Takahashi, Makoto Sakai
    • Organizer
      The 2021 International Chemical Congress of Pacific Basin Societie
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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

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