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Comprehensive study on the post-Golgi trafficking pathway, mediated by diverse Rab family proteins

Research Project

Project/Area Number 19H03181
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionOsaka University

Principal Investigator

Yoshimura Shin-ichiro  大阪大学, 大学院医学系研究科, 講師 (60584521)

Co-Investigator(Kenkyū-buntansha) 岩野 智彦  山梨大学, 大学院総合研究部, 助教 (10442930)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
KeywordsRab / ゴルジ体 / トランスゴルジネットワーク / 一次繊毛 / エンドソーム / リソソーム / 細胞膜 / エンドサイトーシス / エクソサイトーシス / 繊毛
Outline of Research at the Start

ゴルジ体以降の後期輸送経路は複雑なネットワークを形成している。故に後期輸送経路を通過するタンパク質、脂質の輸送の経路及びそれを制御する分子基盤は未だ判然としていない。 複雑な後期輸送経路を支える主要な因子としてRabタンパク質とその結合分子(エフェクター)が知られている。しかしながら現在においてもエフェクターの未同定、不十分な解析などにより、輸送の分子機構の全貌の解明には程遠い。
本研究では (1) 新規Rabエフェクタータンパク質の探索、解析、(2) それを通じて後期輸送経路の形成、維持の機構、さらにタンパク質輸送における後期輸送経路の役割について未解明な問題の解決を目指す。

Outline of Final Research Achievements

More than half of 60 Rab proteins which are encoded by the mammalian genome, localize at the post-Golgi compartment. In this study, we identified and analyzed post-Golgi Rab-biding effector proteins.
We revealed that Rab6 and its novel binding proteins, Oxr1 and Ncoa7 localize on Golgi apparatus and trans-Golgi network (TGN) and negatively regulate V-ATPase activity. In addition, we found that Rab8 and its binding effector, EHBP1L1 localize on ciliary vesicle, which appears in early primary ciliogenesis. We also showed that EHBP1L1 cooperates with its binding proteins, CD2AP and CIN85, promote actin polymerization resulting in shortening the length of primary cilia.

Academic Significance and Societal Importance of the Research Achievements

我々は本研究の成果を世界に先駆けて論文として発表済み、あるいは発表予定であり、その点ではコミュニティーへの貢献は大きいと考えている。また我々が同定したRab結合分子の一部は疾患の原因となることが明らかになっており、本研究により当該疾患の理解が深まることが期待されることからその点でも社会的意義があると考えられる。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (8 results)

All 2023 2022 2020 2019

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

  • [Journal Article] The Rab GTPase-binding protein EHBP1L1 and its interactors CD2AP/CIN85 negatively regulate the length of primary cilia via actin remodeling2023

    • Author(s)
      Iwano Tomohiko、Sobajima Tomoaki、Takeda Sen、Harada Akihiro、Yoshimura Shin-ichiro
    • Journal Title

      Journal of Biological Chemistry

      Volume: 299 Issue: 3 Pages: 102985-102985

    • DOI

      10.1016/j.jbc.2023.102985

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] EHBP1L1, an apicobasal polarity regulator, is critical for nuclear polarization during enucleation of erythroblasts2023

    • Author(s)
      Wu Ji、Moriwaki Kenta、Asuka Tatsuya、Nakai Ritsuko、Kanda Satoshi、Taniguchi Manabu、Sugiyama Tatsuki、Yoshimura Shin-ichiro、Kunii Masataka、Nagasawa Takashi、Hosen Naoki、Miyoshi Eiji、Harada Akihiro
    • Journal Title

      Blood Advances

      Volume: - Issue: 14 Pages: 3382-3394

    • DOI

      10.1182/bloodadvances.2022008930

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The lysosomal Ragulator complex activates NLRP3 inflammasome in vivo via HDAC6.2023

    • Author(s)
      Tsujimoto K, Jo T, Nagira D, Konaka H, Park JH, Yoshimura SI, Ninomiya A, Sugihara F, Hirayama T, Itotagawa E, Matsuzaki Y, Takaichi Y, Aoki W, Saita S, Nakamura S, Ballabio A, Nada S, Okada M, Takamatsu H, Kumanogoh A.
    • Journal Title

      EMBO J.

      Volume: 42 Issue: 1

    • DOI

      10.15252/embj.2022111389

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] PACSIN1 is indispensable for amphisome-lysosome fusion during basal autophagy and subsets of selective autophagy2022

    • Author(s)
      Oe Yukako、Kakuda Keita、Yoshimura Shin-ichiro、Hara Naohiro、Hasegawa Junya、Terawaki Seigo、Kimura Yasuyoshi、Ikenaka Kensuke、Suetsugu Shiro、Mochizuki Hideki、Yoshimori Tamotsu、Nakamura Shuhei
    • Journal Title

      PLOS Genetics

      Volume: 18 Issue: 6 Pages: e1010264-e1010264

    • DOI

      10.1371/journal.pgen.1010264

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] SNAP23 deficiency causes severe brain dysplasia through the loss of radial glial cell polarity2020

    • Author(s)
      Kunii M、Noguchi Y、Yoshimura S、Kanda S、Iwano T、Avriyanti E、Atik N、Sato T、Sato K、Ogawa M、Harada A
    • Journal Title

      Journal of Cell Biology

      Volume: 220 Issue: 1 Pages: 1-21

    • DOI

      10.1083/jcb.201910080

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Loss of Rab6a in the small intestine causes lipid accumulation and epithelial cell death from lactation2020

    • Author(s)
      Iwaki Ayano、Moriwaki Kenta、Sobajima Tomoaki、Taniguchi Manabu、Yoshimura Shin‐ichiro、Kunii Masataka、Kanda Satoshi、Kamada Yoshihiro、Miyoshi Eiji、Harada Akihiro
    • Journal Title

      The FASEB Journal

      Volume: 34 Issue: 7 Pages: 9450-9465

    • DOI

      10.1096/fj.202000028r

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] EHBP1L1が一次繊毛形成に果たす役割2022

    • Author(s)
      吉村信一郎 岩野智彦
    • Organizer
      第95回日本生化学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Rab11新規結合分子RELCHによるエンドソーム-TGN間コレステロール輸送の制御2019

    • Author(s)
      吉村信一郎
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2019-04-18   Modified: 2025-01-30  

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