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Investigation of giga- and terahertz frequency of main-chain involved with function of hemoglobin confined in pore with low dielectric constant

Research Project

Project/Area Number 20K03877
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13040:Biophysics, chemical physics and soft matter physics-related
Research InstitutionUniversity of Tsukuba

Principal Investigator

Nagatomo Shigenori  筑波大学, 数理物質系, 講師 (80373190)

Co-Investigator(Kenkyū-buntansha) 中谷 清治  筑波大学, 数理物質系, 教授 (00250415)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsヘムタンパク質 / シリカゲル / 細孔 / 拡散 / 振動分光 / ヘモグロビン / ミオグロビン / 蛍光 / 共焦点顕微鏡 / ラマンスペクトル / 亜鉛 / 吸収スペクトル / 倒立型顕微鏡 / 協同効果 / ゆらぎ / テラヘルツ
Outline of Research at the Start

本研究の概要は,酸素運搬タンパク質であるヘモグロビン(Hb)の酸素結合における協同効果発現機構に関して提案されている「タンパク質主鎖の大振幅揺らぎ説」,「低振動数モードの寄与説」の実験的に検証するために,Hbを比誘電率の小さい多孔質シリカゲルの細孔に入れて(水溶液中では水の大きな比誘電率のため,タンパク質由来のシグナルが水の強いシグナルのために隠れてしまい検出が事実上できなかった)ギガヘルツ,テラヘルツ領域の低振動数モードの分光測定により検証を行う研究である.さらに,細孔内に入ったHbと水溶液のHbの分子構造の比較から,Hbの協同効果発現機構における重要な因子の解明を目指す研究である.

Outline of Final Research Achievements

I conducted this research to elucidate the contribution of GHz and THz frequencies to the expression of functions of hemoglobin molecules existing in living organisms. In order to reduce the contribution of water, we tried to detect frequencies of GHz and THz by confining it in silica gel pores with a low dielectric constant, but the contribution of water was larger than expected, making it difficult to advance the research. Therefore, in order to obtain basic knowledge regarding this topic, we focused on investigating the behavior of heme proteins within the pore. Through research using confocal microscopy and microscopic absorption spectroscopy, we revealed that desorption due to electrostatic interaction between the pore inner surface and the protein greatly contributes to the behavior of heme proteins within the pore.

Academic Significance and Societal Importance of the Research Achievements

細孔内に取り込まれたヘムタンパク質の挙動を調べることで,ヘムタンパク質が変性されることなく細孔内を移動する過程を追跡できたことにより,タンパク質分離の過程を解き明かすことに貢献した.とりわけpHを変化させることでヘムタンパク質の拡散挙動が表面拡散の脱着速度に大きく依存していることを実証したことは細孔内におけるヘムタンパク質の挙動に関する基礎的知見を得ることに大きく貢献している.本研究で得られた知見は,混合物からのタンパク質分離を考えるときに大きな学術的意義をもち,さらにはヘモグロビン分子の機能の発現におけるGHz, THzの振動数の果たす寄与の解明につながると考える.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2024 2023 2022 2021 2020

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Evolution of myoglobin diffusion mechanisms: exploring pore and surface diffusion in a single silica particle2024

    • Author(s)
      Akihisa Miyagawa, Hatsuhi Kuno, Shigenori Nagatomo, Kiyoharu Nakatani
    • Journal Title

      Analytical Sciences

      Volume: - Issue: 8 Pages: 1545-1551

    • DOI

      10.1007/s44211-024-00575-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pore Size Dependence of Mass Transfer of Zinc Myoglobin in a Single Mesoporous Silica Particle2023

    • Author(s)
      Akihisa Miyagawa, Shigenori Nagatomo, Hatsuhi Kuno, Takuto Terada, Kiyoharu Nakatani
    • Journal Title

      Langmuir

      Volume: 39 Issue: 32 Pages: 11329-11336

    • DOI

      10.1021/acs.langmuir.3c01017

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heme-bound tyrosine vibrations in hemoglobin M: Resonance Raman, crystallography, and DFT calculation2022

    • Author(s)
      Nagatomo Shigenori、Shoji Mitsuo、Terada Takuto、Nakatani Kiyoharu、Shigeta Yasuteru、Hirota Shun、Yanagisawa Sachiko、Kubo Minoru、Kitagawa Teizo、Nagai Masako、Ohki Mio、Park Sam-Yong、Shibayama Naoya
    • Journal Title

      Biophysical Journal

      Volume: 121 Issue: 14 Pages: 2767-2780

    • DOI

      10.1016/j.bpj.2022.06.012

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural origin of cooperativity in human hemoglobin: a view from different roles of α and β subunits in the α2β2 tetramer2022

    • Author(s)
      Shigenori Nagatomo, Masako Nagai, Teizo Kitagawa
    • Journal Title

      Biophysical Reviews

      Volume: 14 Issue: 2 Pages: 483-498

    • DOI

      10.1007/s12551-022-00945-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Roles of Fe-Histidine bonds in stability of hemoglobin: recognition of protein flexibility by Q Sepharose2021

    • Author(s)
      Shigenori Nagatomo, Teizo Kitagawa, Masako Nagai
    • Journal Title

      Biophysical Journal

      Volume: 120 Issue: 13 Pages: 1-12

    • DOI

      10.1016/j.bpj.2021.05.014

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Kinetic Analysis of the Mass Transfer of Zinc Myoglobin in a Single Mesoporous Silica Particle by Confocal Fluorescence Microspectroscopy2021

    • Author(s)
      Akihisa Miyagawa, Shigenori Nagatomo, Hiroaki Kazami, Takuto Terada, Kiyoharu Nakatani
    • Journal Title

      Langmuir

      Volume: 37 Issue: 43 Pages: 12697-12704

    • DOI

      10.1021/acs.langmuir.1c02127

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] ヘモグロビンM IwateとM Bostonにおけるヘム-チロシン結合の振動分光,結晶構造,理論計算による解析2021

    • Author(s)
      長友重紀,寺田拓人,庄司光男,重田育照,中谷清治,廣田俊,北川禎三, 長井雅子, 大木規央, 朴三用, 柴山修哉
    • Organizer
      第47回生体分子科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 細孔内に取りこまれたヒト成人ヘモグロビンの機能発現におけるGHz, THz領域の主鎖のゆらぎの実験的検証2021

    • Author(s)
      長友 重紀
    • Organizer
      2020年度福井大学遠赤外領域開発研究センター共同研究成果報告会
    • Related Report
      2020 Research-status Report
  • [Presentation] Separation of tetramer-dimer mixtures mutant hemoglobin by structural flexibility2020

    • Author(s)
      Shigenori Nagatomo, Teizo Kitagawa, Masako Nagai
    • Organizer
      The 58th Annual Meeting of the Biophysical Society of Japan
    • Related Report
      2020 Research-status Report
  • [Presentation] 単一メソ多孔性シリカゲル微粒子/水系における亜鉛ミオグロビンの細孔内物質移動過程の細孔径依存性2020

    • Author(s)
      寺田 拓人,風見 裕明, 宮川 晃尚, 長友 重紀, 中谷 清治
    • Organizer
      第39回溶媒抽出討論会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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