• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of molecular mechanisms for reassembling the nuclear lamina and NPCs

Research Project

Project/Area Number 20K06617
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44010:Cell biology-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Takeshi Shimi  東京工業大学, 科学技術創成研究院, 特任准教授 (60817568)

Project Period (FY) 2020-04-01 – 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 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords核ラミナ / ラミン / 核膜孔複合体 / ヌクレオポリン / BAF / cGAS / 核膜孔
Outline of Research at the Start

動物細胞では、核ラミナが核膜を裏打ちすることによって核構造を保ち、核膜孔複合体が核膜を貫通することによって核-細胞質間の物質輸送を調節する。このように各々が独自の構造と機能を持つ一方で、核膜上で相互に作用しながら連携して機能すると考えられる。ラミナが核膜孔複合体と接触する領域であるNADは、ラミナが核膜孔複合体の構造と機能に働きかける局所場として、細胞生理学的な意義が極めて高いと推定される。本研究では、NADを含むラミンの領域とNADが結合するゲノムDNA領域を同定し、NADの役割を調べることで、NADが核膜の形成・修復を制御する分子メカニズムを解明する。

Outline of Final Research Achievements

In mammalian cell nuclei, the nuclear lamina (NL) underlies the nuclear envelope to maintain nuclear structure. The major structural components of the NL, the nuclear lamins are involved in the protection against NE rupture induced by mechanical stress. A-type lamins are derived from the single gene LMNA by alternative splicing to produce long and short splicing variants, lamin A (LA) and lamin C (LC), respectively. Numerous LMNA mutations are known to cause human genetic disorders collectively called as laminopathies. We revealed that among all the lamin isoforms, only nucleoplasmic LC rapidly accumulated at the rupture sites. Some of laminopathy mutations in the immunoglobulin-like fold domain of LC disrupted the binding to BAF, leading to the inhibition of the recruitment from the nucleoplasm to the rupture sites. BAF accumulation at the rupture sites and DNA sensing of cytoplasmic cGAS were partially dependent on LA/C.

Academic Significance and Societal Importance of the Research Achievements

本研究では、ラミンCが破損した核膜に迅速に集積し、核膜の修復機構に関与することが明らかとなった。さらに、ラミンの変異が原因するラミノパシーにおいて、核膜の修復機構に遅延が生じることが判明した。これらの研究成果は、破壊した核膜の修復と核膜の恒常的な維持を行う分子機構の解明につながるという観点から細胞生物学的な意義が高いだけでなく、核膜の破損を伴う早老症、心筋症、筋ジストロフィーに代表されるラミノパシーの分子レベルでの病態解明と新規治療戦略の探索などの応用研究へと展開する可能性があると考えられる。

Report

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

    (19 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (13 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (4 results) (of which Invited: 3 results) Remarks (1 results)

  • [Int'l Joint Research] Northwestern University/Feinberg School of Medicine/Dept. of Cell & Developmental Biology(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Carnegie Institution for Science/Dept. of Embryology(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Johns Hopkins University/Dept. of Biological Chemistry(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Zurich/Dept. of Biochemistry(スイス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Asan Medical Center/Asan Institute for Life Science/Convergence Medicine Research Center,(韓国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Northwestern University/Feinberg School of Medicine/Dept. of Cell and Developmental Biology(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Carnegie Institution for Science/Dept. of Embryology(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Johns Hopkins University/Dept. of Biological Chemistry(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Zurich/Dept. of Biochemistry(スイス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Dept. of Cell and Developmental Biology/Feinberg School of Medicine/Northwestern University(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Dept. of Biophysics/UT Southwestern Medical Center(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Dept. of Embryology/Carnegie Institution for Science(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Dept. of Biochemistry/University of Zurich(スイス)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Computational analyses reveal spatial relationships between nuclear pore complexes and specific lamins2021

    • Author(s)
      Mark Kittisopikul, Takeshi Shimi, Meltem Tatli, Joseph Riley Tran, Yixian Zheng, Ohad Medalia, Khuloud Jaqaman, Stephen A. Adam, and Robert D. Goldman
    • Journal Title

      Journal of Cell Biology

      Volume: 220 Issue: 4

    • DOI

      10.1083/jcb.202007082

    • Related Report
      2022 Annual Research Report 2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Defective repair of nuclear envelope ruptures in laminopathies2023

    • Author(s)
      志見 剛、河野 洋平、Stephen A. Adam、Yixian Zheng、Ohad Medalia、Robert D. Goldman、木村 宏
    • Organizer
      日本生理学会 第100回記念大会 シンポジウム:核膜研究の最前線
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] The differential dynamics of nuclear lamin A and C in repair of nuclear envelope ruptures2022

    • Author(s)
      志見 剛、河野 洋平、Stephen A. Adam、Yixian Zheng、Ohad Medalia、Robert D. Goldman、木村 宏
    • Organizer
      第95回 日本生化学会大会 シンポジウム:プレイオトロピックな核膜の生物学
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] A型ラミンが損傷した核ラミナを修復する分子メカニズム2021

    • Author(s)
      志見剛, 河野洋平, Pack CG, Adam SA, Zheng Y, Medalia O, Goldman RD, 木村宏
    • Organizer
      第73回日本細胞生物学会大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Laminopathy-associated defects in repairing the nuclear lamina after nuclear rupture2020

    • Author(s)
      Takeshi Shimi, Yohei Kono, Chan-Gi Pack, Stephen A. Adam, Yixian Zheng, Robert D. Goldman, Hiroshi Kimura
    • Organizer
      第43回分子生物学会年会
    • Related Report
      2020 Research-status Report
  • [Remarks] 動物細胞の核膜における核膜孔複合体とラミンの結合の定量解析に成功

    • URL

      https://www.titech.ac.jp/news/2021/048787

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi