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Measurement of the entropy of protein structural changes using the millimeter-wave passive thermography

Research Project

Project/Area Number 16K14684
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Structural biochemistry
Research InstitutionGifu Women's University

Principal Investigator

Kishigami Akio  岐阜女子大学, 家政学部, 教授 (40261177)

Co-Investigator(Kenkyū-buntansha) 莅戸 立夫  富山大学, 大学院理工学研究部(工学), 准教授 (00261149)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsthermodynamics / protein / millimeter-wave / ミリ波 / 放射温度計 / タンパク質構造変化 / 自由エネルギー / ガラス転移 / カロリメトリー / 蛋白質 / シグナル伝達 / 生物物理
Outline of Final Research Achievements

We attempted to measure BSA solution at around 200 K using a passive millimeter-wave microscope system that can measure thermal energy absorption non-invasively at low temperatures. The measurement results suggested a transition from one heat absorption state to another. To reveal the function of a protein with high efficiency, specificity and accuracy is to reveal the dynamics within the thermally fluctuating protein structure. Thermodynamic parameters of protein dynamics are obtained by protein calorimetry. The research results are expected to be a new method of protein calorimetry since it is considered that the change of thermal energy absorption accompanying the major transition of protein structure could be observed.

Academic Significance and Societal Importance of the Research Achievements

学術的な意義は、黒体輻射現象のプランク則を原理とするミリ波放射を応用した装置と低温トラップ法を組み合わせた新規な考案に基づいて、凍ったタンパク質水溶液からタンパク質熱放射だけの検出を実施したことである。また、タンパク質機能の解析に必要なタンパク質熱量測定をおこなう場合、熱変化を直接測定するDSCやITCは、熱伝導と熱平衡状態が必要なために測定に時間を要する。一方、van’t Hoff則を利用する分光測定法は、近似的値しか得られない。しかし、非侵襲的で2元画像化が可能なミリ波パッシブ顕微鏡システムは、既存の問題を越えて、多検体を同時に短時間で測定する装置への応用が期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (6 results)

All 2019 2018 2017 2016

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Observation of Protein Thermodynamics in Ice by Passive Millimeter-Wave Microscopy2019

    • Author(s)
      Ishino Manabu、Kishigami Akio、Kudo Hiroyuki、Bae Jongsuck、Nozokido Tatsuo
    • Journal Title

      Journal of Infrared, Millimeter, and Terahertz Waves

      Volume: 40 Issue: 5 Pages: 585-594

    • DOI

      10.1007/s10762-019-00585-1

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Measurement of Protein Conformational Fluctuation in Ice by Passive Millimeter-Wave Microscopy2018

    • Author(s)
      Akio Kishigami, Tatsuo Nozokido
    • Journal Title

      2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

      Volume: - Pages: 1-2

    • DOI

      10.1109/irmmw-thz.2018.8509927

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Measurement of protein conformational fluctuation in ice by passive millimeter-wave microscopy2018

    • Author(s)
      Akio Kishigami, Tatsuo Nozokido
    • Organizer
      43rd International Conference on infrared,Millimeter and Terahertz Waves (Nagoya, Japan)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スルメイカ視細胞内のcGMP 代謝酵素2018

    • Author(s)
      岸上明生
    • Organizer
      日本動物学会第89回大会(札幌)
    • Related Report
      2018 Annual Research Report
  • [Presentation] スルメイカ感桿型視細胞の微絨毛における PLC のカルシウム・カルモジュリン依存的なアクチン繊維離脱2017

    • Author(s)
      岸上明生
    • Organizer
      日本動物学会 第88回大会 於:富山
    • Related Report
      2017 Research-status Report
  • [Presentation] スルメイカ視細胞のPLCは,CalmodulinとF-actinに結合する2016

    • Author(s)
      岸上明生
    • Organizer
      第19回日本光生物学協会年会
    • Place of Presentation
      東京大学 山上会館
    • Year and Date
      2016-07-28
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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