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Analysis of the voltage-sensing phosphatase using voltage-clamp fluorometry

Research Project

Project/Area Number 19K06585
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Kawanabe Akira  香川大学, 医学部, 講師 (10707128)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords電位依存性ホスファターゼ / 電位依存性 / 脂質代謝酵素 / 電気生理学 / イオンチャネル / 蛍光変化解析 / パッチクランプ / 膜電位センサー / 電位依存性タンパク質 / 非天然蛍光アミノ酸 / Patch Clamp Fluorometry / イノシトールリン脂質 / 脱リン酸化酵素 / 電位センサー / ホスファターゼ / 電位依存性イオンチャネル
Outline of Research at the Start

細胞内シグナル伝達に重要な酵素群であるイノシトールリン脂質ホスファターゼ[PIPase: イノシトールリン脂質を脱リン酸化する酵素] が基質をどのように認識するのか・酵素活性をON/OFFにするのかなどの分子作用機序は不明であった。そこで本研究では、電位によって活性のON/OFFを制御可能な電位依存性ホスファターゼVSPを用いることで、酵素活性がONになる際の構造変化および、膜との距離変動を蛍光プローブを用いることで評価し、PIPaseに共通する動作原理を解明することを目的にしている。

Outline of Final Research Achievements

Inositol phospholipid phosphatases (PIPases) have important physiological functions. In this study, we aimed to clarify the mechanism of enzymatic activity of voltage-sensitive phosphatases (VSP, a type of PIPase) and to elucidate the common operating principle of PIPases. We analyzed local conformational changes from the fluorescence changes of VSPs with unnatural fluorescent amino acid (Anap), and suggested that the relative distance between "voltage sensor" and "enzyme region" changes during VSP activation, which affects the enzyme activity. Based on these results, we also produced functionally-enhanced VSPs.

Academic Significance and Societal Importance of the Research Achievements

細胞膜構成成分の1つであるイノシトールリン脂質 (PI) は、細胞膜上でシグナル伝達の役割も担い、生体の恒常性を維持するために重要である。PIの生理的機能を調整する酵素の1つがイノシトールリン脂質ホスファターゼ (PIPase) であるが分子機能の動作原理まで踏みんだ研究は進んでいない。その中で、われわれは機能解析と構造変化解析を組み合わせることで、動作機構を解明した。得られた知見は、PIPaseをターゲットとする臨床医学・創薬研究の基盤となると考えている。また、新規に作製した機能向上型VSPは、分子ツールとしてのさらなる活用が見込まれるため、研究分野の発展にも貢献できている。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (29 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (16 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results) Remarks (4 results)

  • [Int'l Joint Research] Weizmann Institute of Science/The Hebrew University of Jerusalem/Israel Institute of Technology(イスラエル)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Humboldt-Universit zu Berlin(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Rhodopsin-bestrophin fusion proteins from unicellular algae form gigantic pentameric ion channels2022

    • Author(s)
      Rozenberg A,Kaczmarczyk I,Matzov D,Vierock J,Nagata T,Sugiura M,Katayama K,Kawasaki Y,Konno M,Nagasaka Y,Aoyama M,Das I,Pahima E,Church J,Adam S,Borin VA,Chazan A,Augustin S,Wietek J,Dine J,Peleg Y,Kawanabe A,Fujiwara Y,Yizhar O,Sheves M,Schapiro I,Furutani Y,Kandori H,Inoue K,Hegemann P,Beja O,Shalev-Benami M.
    • Journal Title

      Nature Structural & Molecular Biology

      Volume: 29 Issue: 6 Pages: 592-603

    • DOI

      10.1038/s41594-022-00783-x

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Interaction between S4 and the phosphatase domain mediates electrochemical coupling in voltage-sensing phosphatase (VSP)2022

    • Author(s)
      Mizutani Natsuki、Kawanabe Akira、Jinno Yuka、Narita Hirotaka、Yonezawa Tomoko、Nakagawa Atsushi、Okamura Yasushi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 26 Pages: 2200364119-2200364119

    • DOI

      10.1073/pnas.2200364119

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Intermolecular functional coupling between phosphoinositides and the potassium channel KcsA2022

    • Author(s)
      Kiya Takunari、Takeshita Kohei、Kawanabe Akira、Fujiwara Yuichiro
    • Journal Title

      Journal of Biological Chemistry

      Volume: 298 Issue: 8 Pages: 102257-102257

    • DOI

      10.1016/j.jbc.2022.102257

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heterologous functional expression of ascidian Nav1 channels and close relationship with the evolutionary ancestor of vertebrate Nav channels2021

    • Author(s)
      Kawai Takafumi、Hashimoto Masaki、Eguchi Natsuki、Nishino Junko M.、Jinno Yuka、Mori-Kreiner Risa、Aspaker Mans、Chiba Daijiro、Ohtsuka Yukio、Kawanabe Akira、Nishino Atsuo S.、Okamura Yasushi
    • Journal Title

      Journal of Biological Chemistry

      Volume: 296 Pages: 100783-100783

    • DOI

      10.1016/j.jbc.2021.100783

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Engineering an enhanced voltage-sensing phosphatase2020

    • Author(s)
      Kawanabe Akira、Mizutani Natsuki、Polat Onur K.、Yonezawa Tomoko、Kawai Takafumi、Mori Masayuki X.、Okamura Yasushi
    • Journal Title

      Journal of General Physiology

      Volume: 152 Issue: 5

    • DOI

      10.1085/jgp.201912491

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The mechanoreceptor DEG-1 regulates cold tolerance in Caenorhabditis elegans2020

    • Author(s)
      Takagaki N., Ohta A., Ohnishi K., Kawanabe A., Minakuchi Y., Toyoda A., Fujiwara Y., Kuhara A.
    • Journal Title

      EMBO reports

      Volume: 21 Issue: 3 Pages: 1-14

    • DOI

      10.15252/embr.201948671

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Functional analysis of a double-point mutation in the KCNJ2 gene identified in a family with Andersen-Tawil syndrome2019

    • Author(s)
      Fukumura Shinobu、Yamauchi Kosuke、Kawanabe Akira、Yamamoto Akiyo、Nakaza Maki、Kubota Tomoya、Kato Shinsuke、Sasaki Ryogen、Okamura Yasushi、Takahashi Masanori P.
    • Journal Title

      Journal of the Neurological Sciences

      Volume: 407 Pages: 116521-116521

    • DOI

      10.1016/j.jns.2019.116521

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Mechanisms of voltage-depndent H+ channel activity regulated by membrane stretch and lipids2023

    • Author(s)
      Takata Maki, Kohei Takeshita, Akira Kawanabe, Yuichiro Fujiwara
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Functional regulation of phosphoinositides to the potassium channel KcsA2023

    • Author(s)
      Takunari Kiya, Kohei Takeshita, Akira Kawanabe, Yuichiro Fujiwara
    • Organizer
      カリウムチャネルKcsAに対するイノシトールリン脂質の機能制御
    • Related Report
      2022 Annual Research Report
  • [Presentation] Direct interaction between the voltage-gated proton channel and ATP2023

    • Author(s)
      Akira Kawanabe, Maki Takata, Kohei Takeshita and Yuichiro Fujiwara
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ATPは電位依存性プロトンチャネルHv1に直接結合して活性を制御する2022

    • Author(s)
      川鍋陽、竹下浩平、高田麻紀、藤原祐一郎
    • Organizer
      生理研研究会「構造情報を基盤とした膜機能分子の生理機能理解に向けて」
    • Related Report
      2022 Annual Research Report
  • [Presentation] カリウムチャネルKcsAとイノシトールリン脂質の分子間相互作用と機能修飾2022

    • Author(s)
      紀谷拓音、竹下浩平、川鍋陽、藤原祐一郎
    • Organizer
      生理研研究会「構造情報を基盤とした膜機能分子の生理機能理解に向けて」
    • Related Report
      2022 Annual Research Report
  • [Presentation] Intracellular ATP controls the voltage-gated proton channel2022

    • Author(s)
      Akira Kawanabe, Maki Takata and Yuichiro Fujiwara
    • Organizer
      第60回日本生物物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Toward an analysis of the effects of hydrogen sulfide on the voltage-gated potassium channel2022

    • Author(s)
      Akira Kawanabe and Yuichiro Fujiwara
    • Organizer
      4th International Conference on Persulfide and Sulfur Metabolism in Biology and Medicine
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The voltage-gated proton channel is regulated by ATP2022

    • Author(s)
      Akira Kawanabe, Maki Takata and Yuichiro Fujiwara
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] カリウムチャネルとイノシトールリン脂質の分子間相互作用と機能修飾2022

    • Author(s)
      紀谷拓音、竹下浩平、川鍋陽、藤原祐一郎
    • Organizer
      2021(令和3)年度 生理研研究会 細胞の局所コミュニティ研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] 膜タンパク質の分子機構解析への 非天然蛍光アミノ酸の活用2021

    • Author(s)
      川鍋陽、坂田宗平、岡村康司
    • Organizer
      日本薬学会第141年会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Cytoplasmic structural changes of voltage-sensing phosphatase detected by patch clamp fluorometry.2021

    • Author(s)
      Akira Kawanabe, Yuichiro Fujiwara
    • Organizer
      第98回日本生理学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 電位依存性プロトンチャネル活性に影響する細胞内分子2020

    • Author(s)
      川鍋陽、藤原祐一郎
    • Organizer
      生理学研究所研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] Intracellular regulation of the voltage-gated proton channel.2020

    • Author(s)
      Akira Kawanabe, Yuichiro Fujiwara
    • Organizer
      第58回日本生物物理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 非天然蛍光アミノ酸を用いた膜タンパク質の動作メカニズム解析2020

    • Author(s)
      川鍋陽、米澤智子、神野有香、坂田宗平、岡村康司
    • Organizer
      日本薬学会第140年会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] The conformational change of the cytoplasmic region of voltage-sensing phosphatase2020

    • Author(s)
      Akira Kawanabe, Manami Nishizawa, Kazuhisa Nishizawa, Hirotaka Narita, Tomoko Yonezawa, Yuka Jinno, Souhei Sakata, Atsushi Nakagawa, Yasushi Okamura
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Improvement of voltage-sensing phosphatase as a molecular tool of phosphoinositide depletion in living cells2019

    • Author(s)
      Akira Kawanabe, Natuki Mizutani, Tomoko Yonezawa, Yasushi Okamura
    • Organizer
      第57回日本生物物理学会年会
    • Related Report
      2019 Research-status Report
  • [Remarks] 香川大学医学部 分子生理学講座

    • URL

      https://www.med.kagawa-u.ac.jp/~physiology1/index.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 香川大学医学部分子生理学講座Webページ

    • URL

      http://www.med.kagawa-u.ac.jp/~physiology1/index.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 香川大学医学部分子生理学講座

    • URL

      http://www.med.kagawa-u.ac.jp/~physiology1/index.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 香川大学医学部 分子生理学講座

    • URL

      http://www.med.kagawa-u.ac.jp/~physiology1/index.html

    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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