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Molecular mechanisms for conversion and transduction of light signal in a light-activatable transcription factor

Research Project

Project/Area Number 19K06586
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionOsaka University

Principal Investigator

Hisatomi Osamu  大阪大学, 理学研究科, 准教授 (60231544)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywordsオーレオクローム / LOVドメイン / フラビン / bZIP / 光制御型転写因子 / bZIPドメイン / 光活性化転写因子 / 光情報変換 / bZIP型転写因子
Outline of Research at the Start

本研究では、代表者らが開発した光制御型転写因子(光ジッパー、略称PZ)の解析を通じて、光情報の変換と伝達の過程を生物物理学的な観点から明らかにすることを目的とする。具体的には、青色光が誘起するLOVドメインの構造変化によりbZIPドメインが活性化する機構、bZIPドメインが標的DNA配列と複合体を形成する機構を解明する。また、PZは、転写活性の制御をはじめ、光二量体化を利用したタンパク質の活性制御やコイルドコイル形成の制御など、様々な応用展開が考えられるので、光制御モジュールとしての活用も視野に入れて研究を進める。

Outline of Final Research Achievements

In this study, we attempted to clarify the molecular mechanism of light signal conversion and transduction of AUREO1, using a light-activatable transcription factor (Photozipper) that we developed as a model protein. Our results indicated that light signal received by the chromophore flavin mononucleotide (FMN) induces a conformational change of LOV core through several amino acids close to FMN, which causes the deformation of the hydrophobic surface on the β-sheet of LOV core. It subsequently induces the detachment of A’α helix flanking to LOV core and the exposes the dimerization surface of LOV core, and result in the increment of its affinity for the target DNA sequence. Our studies strongly suggested the essential mechanism of aureochromes, and may provide valuable insights to understand the molecular mechanisms of other LOV proteins.

Academic Significance and Societal Importance of the Research Achievements

ビタミンB2であるフラビンは、すべての生物に必要不可欠な原子団である。フラビンは酸化還元反応を触媒する多くのタンパク質に含まれるとともに、青色光を受容するための光センサータンパク質中に存在することが知られている。光センサーとしてフラビンを利用するタンパク質には、light oxygen voltage(LOV)ドメインという特徴的な領域が存在する。本研究により、オーレオクロームのLOVドメインの光情報の変換と伝達の分子機構が解明された。本研究により得られた知見は、他のフラビンタンパク質の作動原理の解明や、新たな光遺伝学ツールの作成にも有用であると考えられる。

Report

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

    (26 results)

All 2021 2020 2019 Other

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (21 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (2 results)

  • [Journal Article] Transmission of light signals from the light-oxygen-voltage core via the hydrophobic region of the β-sheet surface in aureochrome-12021

    • Author(s)
      Nakajima, H., Kobayashi, I., Adachi, Y., Hisatomi, O.
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 11995-11995

    • DOI

      10.1038/s41598-021-91497-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 転写因子と複合体形成のメカニズム2021

    • Author(s)
      久冨 修
    • Journal Title

      消化器病学サイエンス

      Volume: 5 Pages: 18-22

    • Related Report
      2020 Research-status Report
  • [Journal Article] Molecular Mechanism of Light-Induced Conformational Switching of the LOV Domain in Aureochrome-12020

    • Author(s)
      Kobayashi Itsuki、Nakajima Hiroto、Hisatomi Osamu
    • Journal Title

      Biochemistry

      Volume: 59 Issue: 28 Pages: 2592-2601

    • DOI

      10.1021/acs.biochem.0c00271

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] The role of ribitol-phosphate of the chromophore (FMN) in AUREO12021

    • Author(s)
      Osamu Hisatomi, Yuta Nagano
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Photoreaction of Aureochrome-3 in a brown alga, E. siliculosus2021

    • Author(s)
      Yuta Nagano, Yumiko Adachi, Osamu Hisatomi
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The role of hydrogen bonds in the stabilization of AUREO1 dimer2021

    • Author(s)
      Yumiko Adachi, Hiroto Nakajima, Yuta Nagano, Osamu Hisatomi
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] High-speed AFM observation on the light-induced dimerization of a bZIP transcription factor, Photozipper2021

    • Author(s)
      Akihiro Tsuji, Hayato Yamashita, Osamu Hisatomi, Masayuki Abe
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高速原子間力顕微鏡による光応答転写因子Photozipperの二量体形成メカニズムに関する研究2021

    • Author(s)
      辻 明宏, 山下 隼人, 久冨 修, 阿部 真之
    • Organizer
      応用物理学会関西支部2021年度第1回講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] High-speed AFM observation on the blue light-induced dimer formation of the transcription factor, Photozipper2021

    • Author(s)
      Akihiro Tsuji, Hayato Yamashita, Osamu Hisatomi, Masayuki Abe
    • Organizer
      第21回日本蛋白質科学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] The nanoscale observation of a light-sensing transcription factor, Photozipper, by High-speed AFM2020

    • Author(s)
      Akihiro Tsuji, Hayato Yamashita, Kento Nomura, Osamu Hisatomi, Masayuki Abe
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Light-induced conformational switching of the LOV domain in aureochrome-12020

    • Author(s)
      Itsuki Kobayashi, Hiroto Nakajima, Osamu Hisatomi
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Signal transduction from LOV domain to effector domain in PZ2020

    • Author(s)
      Hiroto Nakajima, Itsuki Kobayashi, Osamu Hisatomi
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Hydrogen bonds involved in the light-induced conformational switching of AUREO1-LOV2020

    • Author(s)
      Yumiko Adachi, Hiroto Nakajima, Osamu Hisatomi
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] High-speed AFM observation on dimer formation of a light-sensing transcription factor, Photozipper2020

    • Author(s)
      Akihiro Tsuji, Kento Nomura, Hayato Yamashita, Osamu Hisatomi, Masayuki Abe
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] DNA-binding analyses of a light-activatable bZIP transcription factor, Photozipper2019

    • Author(s)
      Osamu Hisatomi
    • Organizer
      6th Awaji International Workshop on “Electron Spin Science & Technology: Biological and Materials Science Oriented Applications”
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Molecular mechanisms of a light-activatable transcription factor, Photozipper.2019

    • Author(s)
      Osamu Hisatomi, Itsuki Kobayashi, Hiroto Nakajima
    • Organizer
      第41回日本比較生理生化学会東京大会(jscpb2019)
    • Related Report
      2019 Research-status Report
  • [Presentation] 高速 AFM による DNA 結合光受容タンパク質 Photozipper の 1 分子動態イメージング2019

    • Author(s)
      Kento Nomura, Hayato Yamashita, Osamu Hisatomi, Masayuki Abe
    • Organizer
      理化学研究所- 広島大学 合同シンポジウム「イメージングから理論」
    • Related Report
      2019 Research-status Report
  • [Presentation] Hydrophobic residues on the β-sheet of a light-activatable bZIP factor, Photozipper2019

    • Author(s)
      Hiroto Nakajima, Itsuki Kobayashi, Osamu Hisatomi
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Analyses of the target sequence recognition of a bZIP factor, using a light-activatable Photozipper2019

    • Author(s)
      Osamu Hisatomi, Samu Tateyama, Itsuki Kobayashi
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] The role of Gln317 in a light-activatable bZIP module, Photozipper2019

    • Author(s)
      Itsuki Kobayashi, Osamu Hisatomi
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Single molecular dynamics imaging of DNA binding photoreceptor protein, Photozipper, by high-speed AFM2019

    • Author(s)
      Kento Nomura, Hayato Yamashita, Osamu Hisatomi, Masayuki Abe
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 機能性タンパク質Photozipperの構造と反応2019

    • Author(s)
      三野 広幸、佃野 弘幸、小関 康平、小林 樹、久冨 修
    • Organizer
      生体分子科学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] 高速AFMによるDNA結合光受容タンパク質Photozipperの1分子動態イメージング2019

    • Author(s)
      野村健人, 山下隼人, 久冨修, 阿部真之
    • Organizer
      第66回近畿支部例会
    • Related Report
      2019 Research-status Report
  • [Presentation] Single molecule observation of DNA binding photoreceptor protein, Photozipper, by high-speed atomic force microscopy2019

    • Author(s)
      Kento Nomura, Hayato Yamashita, Osamu Hisatomi, Masayuki Abe
    • Organizer
      第71回日本細胞生物学会大会
    • Related Report
      2019 Research-status Report
  • [Remarks] 久冨サブグループのページ

    • URL

      http://gabriel.ess.sci.osaka-u.ac.jp/html/hisatomi/hisatomi-jp.html

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Remarks] 久冨のページ

    • URL

      http://gabriel.ess.sci.osaka-u.ac.jp/html/hisatomi/hisatomi-jp.html

    • Related Report
      2019 Research-status Report

URL: 

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

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