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Mechanism of Cell Membrane Tension Homeostasis by Membrane Tension Sensor Proteins

Research Project

Project/Area Number 19K06541
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionKobe University

Principal Investigator

Tsujita Kazuya  神戸大学, バイオシグナル総合研究センター, 准教授 (10457054)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords細胞膜の張力 / BARタンパク質 / 光ピンセット / 細胞膜張力 / 膜張力 / アクチン細胞骨格
Outline of Research at the Start

細胞膜の張力という膜の物理的性質は、細胞膜の変形を伴う細胞運動、エンドサイトーシス、細胞分裂、極性形成等の動的な生命現象を本質的に制御していると考えられ、近年注目されている。細胞膜張力の変化が物理刺激として働くためには、それは厳密に制御されなければならない。しかし、最も基本的かつ重要な問題である細胞膜の張力自体を制御する仕組みは未だ不明である。本研究では膜張力センサーであるBARタンパク質に着目し、細胞が細胞膜張力の変化を感知し、その恒常性を維持する仕組みを解明する。そして、張力恒常性の破綻ががん化に寄与していることを明らかにする。

Outline of Final Research Achievements

This study focused on BAR proteins that induce and sense membrane curvature to elucidate the molecular mechanisms by which plasma membrane tension homeostasis is maintained in epithelial cells. Using a combination of optical tweezers and gene knockdown experiments, we identified a BAR protein X that is required for homeostasis of plasma membrane tension. We found that, X, which has a GAP domain for Rac, recruit to the membrane by sensing decreased membrane tension, where it inactive Rac, which in turn activates its competitor, RhoA. This RhoA activation seems to lead to increased membrane tension by increasing membrane-cortex attachment. These results suggest that a feedback regulation between plasma membrane tension and BAR protein X plays an important role in tensional homeostasis of the plasma membrane.

Academic Significance and Societal Importance of the Research Achievements

本研究成果により、BARタンパク質が細胞膜張力を制御する仕組みを解明し、細胞膜張力の恒常性維持機構という上皮細胞のintegrityを保つ新しいコンセプトを提示することができた。細胞膜張力の制御・維持機構はよく分かっておらず、本研究成果は、細胞膜の変形を伴う細胞運動、エンドサイトーシス、細胞分裂、極性形成等の動的な生命現象の理解に大きく貢献するものと期待される。また、BARタンパク質Yは浸潤・転移に関わるがん遺伝子としても知られており、Yはがん治療における有望な標的分子となる可能性が考えられる。

Report

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

    (9 results)

All 2021 2020 2019

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

  • [Journal Article] Homeostatic membrane tension constrains cancer cell dissemination by counteracting BAR protein assembly2021

    • Author(s)
      Tsujita Kazuya、Satow Reiko、Asada Shinobu、Nakamura Yoshikazu、Arnes Luis、Sako Keisuke、Fujita Yasuyuki、Fukami Kiyoko、Itoh Toshiki
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 5930-5930

    • DOI

      10.1038/s41467-021-26156-4

    • NAID

      120007165701

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] PTEN is required for the migration and invasion of Ras‐transformed MDCK cells2021

    • Author(s)
      Yan Lu、Tsujita Kazuya、Fujita Yasuyuki、Itoh Toshiki
    • Journal Title

      FEBS Letters

      Volume: - Issue: 9 Pages: 1303-1312

    • DOI

      10.1002/1873-3468.14053

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Non-cell-autonomous migration of RasV12-transformed cells towards the basal side of surrounding normal cells2021

    • Author(s)
      Jebri Imen、Tsujita Kazuya、Fujita Yasuyuki、Itoh Toshiki
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 543 Pages: 15-22

    • DOI

      10.1016/j.bbrc.2021.01.031

    • NAID

      120006996928

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] An influenza-derived membrane tension-modulating peptide regulates cell movement and morphology via actin remodeling2019

    • Author(s)
      Masuda Toshihiro、Baba Kentarou、Nomura Takeshi、Tsujita Kazuya、Murayama Tomo、Itoh Toshiki、Takatani-Nakase Tomoka、Sokabe Masahiro、Inagaki Naoyuki、Futaki Shiroh
    • Journal Title

      Communications Biology

      Volume: 2 Issue: 1 Pages: 243-243

    • DOI

      10.1038/s42003-019-0486-3

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] SH3YL1 cooperates with ESCRT-I in the sorting and degradation of the EGF receptor2019

    • Author(s)
      Hasegawa Junya、Jebri Imen、Yamamoto Hikaru、Tsujita Kazuya、Tokuda Emi、Shibata Hideki、Maki Masatoshi、Itoh Toshiki
    • Journal Title

      Journal of Cell Science

      Volume: 132 Issue: 19 Pages: 229179-229179

    • DOI

      10.1242/jcs.229179

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 膜曲率誘導タンパク質による細胞膜張力の制御機構2021

    • Author(s)
      辻田和也、伊藤俊樹
    • Organizer
      日本細胞生物学会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 膜曲率誘導タンパク質による細胞膜張力の恒常性維持機構2020

    • Author(s)
      辻田和也、伊藤俊樹
    • Organizer
      第93回日本生化学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 細胞膜張力と膜変形タンパク質によるがん細胞運動・浸潤の制御2020

    • Author(s)
      辻田和也、伊藤俊樹
    • Organizer
      第72回日本細胞生物学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] がん細胞運動のメカノバイオロジー2020

    • Author(s)
      辻田和也、伊藤俊樹
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Research-status Report
    • Invited

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

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