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Altered autoinhibition of KIF5A in neurodegeneration

Research Project

Project/Area Number 22K15053
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Chiba Kyoko  東北大学, 学際科学フロンティア研究所, 助教 (10795701)

Project Period (FY) 2022-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsモータータンパク質 / キネシン / 細胞内輸送 / ALS / 筋萎縮性側索硬化症 / 微小管 / KIF5 / 神経変性疾患 / Kinesin-1
Outline of Research at the Start

KIF5Aタンパク質は細胞内でさまざまな物質の輸送に携わる。KIF5Aの遺伝子変異は筋萎縮性側索硬化症(ALS)の原因となるが、遺伝子変異が神経変性を引き起こすメカニズムは明らかになっていない。本研究は精製KIF5Aを用いた解析により遺伝子変異がKIF5Aタンパク質の機能および性質に与える影響を明らかにする。KIF5Aの輸送機能が損なわれることが神経変性とどのように関連するのか解明する。

Outline of Final Research Achievements

Kinesin is a type of molecular motor proteins involved in cargo transport within cells. Genetic mutations in KIF5A gene, a neuronal kinesin, cause amyotrophic lateral sclerosis (ALS). Most mutations occur around exon 27 of KIF5A, leading to the skipping of exon 27 due to mis-splicing. We analyzed the mutant KIF5A resulting from the skipping of exon 27. Biochemical and cell biological analyses using recombinant proteins of the ALS mutant KIF5A revealed that ALS-associated KIF5A protein is prone to form aggregates and oligomers in cells and in vitro.

Academic Significance and Societal Importance of the Research Achievements

キネシンは細胞内で運び屋の役割をするタンパク質である。近年、KIF5Aの遺伝子変異が筋萎縮性側索硬化症(ALS)の発症に関わることが報告されたが、発症のメカニズムは分かっていなかった。本研究は、ALS変異型のKIF5Aタンパク質においても、運び屋としての機能は保たれていることを示した。逆に、細胞内で塊になってしまうという、本来は持っていない性質を獲得してしまっていることが明らかとなった。これらの知見は、KIF5Aを原因として発症するALSの発症機構解明や治療法の確立に繋がる知見である。

Report

(3 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • Research Products

    (13 results)

All 2024 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (6 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] University of Celifornia, Davis(米国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Comparative analysis of two Caenorhabditis elegans kinesins KLP-6 and UNC-104 reveals a common and distinct activation mechanism in kinesin-32024

    • Author(s)
      Kita Tomoki、Chiba Kyoko、Wang Jiye、Nakagawa Atsushi、Niwa Shinsuke
    • Journal Title

      eLife

      Volume: 12

    • DOI

      10.7554/elife.89040

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Autoinhibition and activation of kinesin-1 and their involvement in amyotrophic lateral sclerosis2024

    • Author(s)
      Chiba Kyoko、Niwa Shinsuke
    • Journal Title

      Current Opinion in Cell Biology

      Volume: 86 Pages: 102301-102301

    • DOI

      10.1016/j.ceb.2023.102301

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Generation of recombinant and chickenized scFv versions of an anti‐kinesin monoclonal antibody H22023

    • Author(s)
      Niwa Shinsuke、Chiba Kyoko
    • Journal Title

      Cytoskeleton

      Volume: - Issue: 9-10 Pages: 356-366

    • DOI

      10.1002/cm.21756

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Insight into the regulation of axonal transport from the study of KIF1A-associated neurological disorder2023

    • Author(s)
      Chiba Kyoko、Kita Tomoki、Anazawa Yuzu、Niwa Shinsuke
    • Journal Title

      Journal of Cell Science

      Volume: 136 Issue: 5

    • DOI

      10.1242/jcs.260742

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] An ALS‐associated KIF5A mutant forms oligomers and aggregates and induces neuronal toxicity2022

    • Author(s)
      Nakano Juri、Chiba Kyoko、Niwa Shinsuke
    • Journal Title

      Genes to Cells

      Volume: 27 Issue: 6 Pages: 421-435

    • DOI

      10.1111/gtc.12936

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Synergistic autoinhibition and activation mechanisms control kinesin-1 motor activity2022

    • Author(s)
      Chiba Kyoko、Ori-McKenney Kassandra M.、Niwa Shinsuke、McKenney Richard J.
    • Journal Title

      Cell Reports

      Volume: 39 Issue: 9 Pages: 110900-110900

    • DOI

      10.1016/j.celrep.2022.110900

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] KIF1A and KIF1Bβ form a heterodimer2023

    • Author(s)
      Kyoko CHIBA, Shinsuke NIWA
    • Organizer
      The 49th Naito Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The FHA domain is essential for the autoinhibition of KIF1A2023

    • Author(s)
      Kyoko CHIBA, Shinsuke NIWA
    • Organizer
      Cell Bio 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Kinesin-3の分子内相互作用と自己阻害2023

    • Author(s)
      千葉杏子
    • Organizer
      第12回分子モーター討論会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] An ALS-associated KIF5A mutant forms oligomers and aggregates and induces neuronal toxicity2022

    • Author(s)
      千葉杏子
    • Organizer
      The American Society for Cell Biology (ASCB), Annual Meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] KIF5A のALS 関連遺伝子変異はKIF5A のオリゴマー化と凝集を促進し神経毒性を引き起こす2022

    • Author(s)
      千葉杏子
    • Organizer
      第60回日本生物物理学会年会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Remarks] リサーチマップ

    • URL

      https://researchmap.jp/kchiba

    • Related Report
      2022 Research-status Report

URL: 

Published: 2022-04-19   Modified: 2025-01-30  

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