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Analysis of physiological function and activation mechanism of atypical small GTPases

Research Project

Project/Area Number 17K07351
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Functional biochemistry
Research InstitutionMeiji Pharmaceutical University

Principal Investigator

Kontani Kenji  明治薬科大学, 薬学部, 教授 (30302615)

Co-Investigator(Kenkyū-buntansha) 荒木 信  明治薬科大学, 薬学部, 助教 (20552904)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords低分子量Gタンパク質 / リソソーム / エンドサイトーシス / ノックアウトマウス / 胚発生 / BMP / 細胞小器官 / ARL8b / ノックアウトマス / HPLC / 低分子量Gタンパク質 / 膜輸送 / オルガネラ / 一次繊毛
Outline of Final Research Achievements

ARL8 is an atypical small GTPase and involved in lysosomal function. In this study, using ARL8b-knockout mice, we found that ARL8 is important for the development of dorsal structures of the neural tube in mouse embryos. In addition, ARL8b-knockout embryos showed up-regulation of BMP signaling in the neural fold at E9.0. Considering the importance for BMP signaling during dorsal development, our findings suggest that loss of ARL8b results in defects in lysosomal degradation of endocytosed BMP receptors causing up-regulation of BMP signaling, thereby leading to the abnormal development of dorsal structures of the neural tube.

Academic Significance and Societal Importance of the Research Achievements

低分子量Gタンパク質はヒトでは150種類以上存在し、これまで主に培養細胞を用いた解析からシグナル伝達系を初めとした細胞応答における重要性が明らかにされてきた。しかし、多くの低分子量Gタンパク質に関して、個体レベルでの役割はあまり分かっていない。この点に関して本研究は、これまでの研究代表者らの研究成果と合わせて、ARL8の哺乳動物個体における生理的役割を世界で初めて明らかにした点で学術的な意義がある。またこれらの知見は、ARL8の機能をコントロールすることにより、個体レベルでリソソーム機能を制御できる可能性を示唆しており、リソソームを標的とする薬剤の開発にも繋がりうる研究成果と考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (16 results)

All 2019 2018 2017

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (9 results) (of which Invited: 1 results)

  • [Journal Article] Decreased conformational stability in the oncogenic N92I mutant of Ras-related C3 botulinum toxin substrate 12019

    • Author(s)
      Toyama Y, Kontani K, Katada T, Shimada I.
    • Journal Title

      Sci. Adv.

      Volume: 5 Issue: 8

    • DOI

      10.1126/sciadv.aax1595

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Conformational landscape alternations promote oncogenic activities of Ras-related C3 botulinum toxin substrate 1 as revealed by NMR2019

    • Author(s)
      Toyama Yuki、Kontani Kenji、Katada Toshiaki、Shimada Ichio
    • Journal Title

      Science Advances

      Volume: 5 Issue: 3

    • DOI

      10.1126/sciadv.aav8945

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] ADP-ribosylation factor-like 8b is required for the development of mouse models of systemic lupus erythematosus2019

    • Author(s)
      Saitoh Shin-Ichiroh、Saitoh Yoshiko Mori、Kontani Kenji、Sato Katsuaki、Miyake Kensuke
    • Journal Title

      International Immunology

      Volume: 31 Issue: 4 Pages: 225-237

    • DOI

      10.1093/intimm/dxy084

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] GEF mechanism revealed by the structure of SmgGDS-558 and farnesylated RhoA complex and its implication for a chaperone mechanism2018

    • Author(s)
      Shimizu Hikaru、Toma-Fukai Sachiko、Kontani Kenji、Katada Toshiaki、Shimizu Toshiyuki
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 115 Issue: 38 Pages: 9563-9568

    • DOI

      10.1073/pnas.1804740115

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structure-based analysis of the guanine nucleotide exchange factor SmgGDS reveals armadillo-repeat motifs and key regions for activity and GTPase binding2017

    • Author(s)
      Shimizu H, Toma-Fukai S, Saijo S, Shimizu N, Kontani K, Katada T and Shimizu T
    • Journal Title

      J Biol Chem

      Volume: 292 Issue: 32 Pages: 13441-13448

    • DOI

      10.1074/jbc.m117.792556

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Arl8b is required for lysosomal degradation of maternal proteins in the visceral yolk sac endoderm of mouse embryos2017

    • Author(s)
      Oka M, Hashimoto K, Yamaguchi Y, Saitoh SI, Sugiura Y, Motoi Y, Honda K, Kikko Y, Ohata S, Suematsu M, Miura M, Miyake K, Katada T and Kontani K
    • Journal Title

      J Cell Sci

      Volume: 130 Issue: 20 Pages: 3568-3577

    • DOI

      10.1242/jcs.200519

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] TLR7 mediated viral recognition results in focal type I interferon secretion by dendritic cells2017

    • Author(s)
      Saitoh SI, Abe F, Kanno A, Tanimura N, Mori Saitoh Y, Fukui R, Shibata T, Sato K, Ichinohe T, Hayashi M, Kubota K, Kozuka-Hata H, Oyama M, Kikko Y, Katada T, Kontani K and Miyake K
    • Journal Title

      Nat Commun

      Volume: 8 Issue: 1 Pages: 1592-1592

    • DOI

      10.1038/s41467-017-01687-x

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] HPLCを用いた低分子量Gタンパク質のグアニンヌクレオチド結合状態の定量的解析2019

    • Author(s)
      荒木信、太田愛梨、寺本貴則、紺谷圏二
    • Organizer
      第18回生命科学研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] HPLCを用いた低分子量Gタンパク質Rhebの活性化状態の定量的解析2019

    • Author(s)
      荒木信、太田愛梨、寺本貴則、紺谷圏二
    • Organizer
      第92回日本生化学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 疾患バイオマーカーを含有する細胞外ナノ粒子の放出割合の定量的解析2019

    • Author(s)
      加藤美夏、荒木信、紺谷圏二
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 逆相イオンペアクロマトグラフィーを用いた低分子量G タンパク質のグアニンヌクレオチド型の定量的解析2018

    • Author(s)
      荒木信、寺本貴則、鈴木理央、紺谷圏二
    • Organizer
      第17回 生命科学研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] HMG-CoA還元酵素阻害剤によるmTORC1調節機構の解析2018

    • Author(s)
      荒木信、島田匠、青木拓人、本島清人、紺谷圏二
    • Organizer
      第91回 日本生化学会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] マウス胚発生における低分子量 G タンパク質 Arl8b の役割2017

    • Author(s)
      紺谷圏二
    • Organizer
      第69回 日本細胞生物学会大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] HMG-CoA還元酵素阻害薬によるオートファジー誘導機構の解析2017

    • Author(s)
      荒木信、青木拓人、鈴木克征、本島清人、紺谷圏二
    • Organizer
      第16回 生命科学研究会
    • Related Report
      2017 Research-status Report
  • [Presentation] スタチン誘導性オートファジーの分子機構の解析2017

    • Author(s)
      荒木信、青木拓人、鈴木克征、本島清人、紺谷圏二
    • Organizer
      平成29年度 日本生化学会関東支部例会
    • Related Report
      2017 Research-status Report
  • [Presentation] HPLCを用いた低分子量Gタンパク質のグアニンヌクレオチドフォームの定量的解析2017

    • Author(s)
      荒木信、寺本貴則、鈴木理央、平沼翔太、小林友哉、紺谷圏二
    • Organizer
      ConBio2017
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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