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Cell biological study for the distribution and dynamic of lipid in the biological membrane with nano-scale analyzing techniques

Research Project

Project/Area Number 20H03154
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 42020:Veterinary medical science-related
Research InstitutionKagoshima University

Principal Investigator

FUJITA Akikazu  鹿児島大学, 農水産獣医学域獣医学系, 教授 (60282232)

Co-Investigator(Kenkyū-buntansha) 正谷 達謄  岐阜大学, 応用生物科学部, 准教授 (70614072)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Keywords脂質 / 電子顕微鏡 / 急速凍結 / フリーズフラクチャー / 微細分布 / オートファジー / ナノスケール / 微細局在 / 凍結割断レプリカ法 / イノシトールリン酸 / 微細構造 / 生体膜
Outline of Research at the Start

分子生物学の飛躍的発展とそれに基づくゲノミクス、プロテオミクスの展開により、DNA・RNAと蛋白質についての知見は急速に増加している。生体膜についても膜蛋白質に関する研究は高度化し、多くの知見が集積されている。しかし膜脂質に関しては有力な解析技術が少ないため、まだまだ未知の点が多く残されている。本研究では、申請者らが開発した急速凍結・凍結割断レプリカ標識法をさらに発展・改良することにより、生体膜脂質の分布・動態をナノスケールレベルで明らかにし、新たなライフ・イノベーションの創出を目指す。

Outline of Final Research Achievements

Autophagy has crucial roles in the intracellular metabolisms of various molecules including proteins, nucleotides, and lipids. We investigated roles of lipids transporter Oshp, which can transport PtdSer and PtdIns(4)P between the membranes of intracellular organelles, in the autophagy process of yeast cells. We found that the defect of the autophagic activity in the all osh genes (osh1-osh7)-knocked out yeast. It was found that no autophagosome was detected in osh5-deleted mutant and accumulated autophagic bodies in the vacuole in osh4-deleted mutant when autophagy was induced. We suggest that Osh5p and Osh4p have roles in the autophagosome formation and in the degradation of autophagic body in the vacuole, respectively, by transporting PtdSer and PtdIns(4)P between the organelle membranes.

Academic Significance and Societal Importance of the Research Achievements

Autophagyは、初期胚発生、細胞変性抑制、細胞内侵入細菌分解、選択的基質分解、がん抑制、炎症制御などの機能を持つことが判明してきた。しかし、autophagosomeがどこで形成、膜脂質の由来は何か、というような基本的なことがわかっていない。今回の研究で得られた成果はautophagyにおける脂質動態の解明に大きく貢献し、オートファジー全容の解明への新たなアプローチを提供する。さらにオートファジー機能の欠陥を原因とする疾患の病態の解明、その成果に基づく新たな医薬品の開発も期待され、ライフイノベーション推進への寄与は大きい。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (13 results)

All 2024 2022 2021 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: 2 results) Presentation (5 results) Remarks (1 results)

  • [Int'l Joint Research] Harvard University(米国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Coordinated regulation of phosphatidylinositol 4-phosphate and phosphatidylserine levels by Osh4p and Osh5p is an essential regulatory mechanism in autophagy2024

    • Author(s)
      Muramoto Moe、Mineoka Nanaru、Fukuda Kayoko、Kuriyama Sayuri、Masatani Tatsunori、Fujita Akikazu
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Biomembranes

      Volume: 1866 Issue: 4 Pages: 184308-184308

    • DOI

      10.1016/j.bbamem.2024.184308

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Essential roles of phosphatidylinositol 4-phosphate phosphatases Sac1p and Sjl3p in yeast autophagosome formation2022

    • Author(s)
      Muramoto Moe、Yamakuchi Yuki、Konishi Rikako、Koudatsu Shiomi、Tomikura Hiromu、Fukuda Kayoko、Kuriyama Sayuri、Kurokawa Yuna、Masatani Tatsunori、Tamaki Hisanori、Fujita Akikazu
    • Journal Title

      Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids

      Volume: 1867 Issue: 9 Pages: 159184-159184

    • DOI

      10.1016/j.bbalip.2022.159184

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Selective increment of phosphatidylserine on the autophagic body membrane in yeast’s vacuole.2021

    • Author(s)
      Yamakuchi, Y., Kurokawa, Y., Konishi, R., Fukuda, K., Masatani, T., Fujita, A.
    • Journal Title

      FEBS Lett.

      Volume: 595 Issue: 17 Pages: 2197-2207

    • DOI

      10.1002/1873-3468.14167

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Glycosphingolipid GM3 is localized in both exoplasmic and cytoplasmic leaflets of Plasmodium falciparum malaria parasite plasma membrane2021

    • Author(s)
      Shiomi Koudatsu, Tatsunori Masatani, Rikako Konishi, Masahito Asada, Hassan Hakimi, Yuna Kurokawa, Kanna Tomioku, Osamu Kaneko & Akikazu Fujita
    • Journal Title

      Scientific reports

      Volume: 11 Issue: 1 Pages: 14890-14890

    • DOI

      10.1038/s41598-021-94037-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The distribution of phosphatidylinositol 4,5-bisphosphate in the budding yeast plasma membrane.2021

    • Author(s)
      Kurokawa, Y., Konishi, R., Yoshida, A., Tomioku, K., Tanabe, K., Fujita, A.
    • Journal Title

      Histochem. Cell Biol.

      Volume: 156 Issue: 2 Pages: 109-121

    • DOI

      10.1007/s00418-021-01989-8

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Raft microdomain localized in the luminal leaflet of inner membrane complex of living Toxoplasma gondii2021

    • Author(s)
      Konishi R et al.
    • Journal Title

      Eur J Cell Biol

      Volume: 100 Issue: 2 Pages: 151149-151149

    • DOI

      10.1016/j.ejcb.2020.151149

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 酵母細胞でのオートファジーにおけるオートファジックボディーの選択的崩壊機構とオートファジックボディー膜におけるホスファチジルセリンの選択的増加2022

    • Author(s)
      山口優希、黒川夕奈、向達汐美、福田佳代子、正谷達謄、藤田秋一
    • Organizer
      第96回 日本生化学大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ヒトmalaria原虫Plasmodium falciparumでのラフト主成分の糖脂質GM3の局在2022

    • Author(s)
      向達 汐美, 正谷 達謄, 小西 里可子, 黒川 夕奈, 山口 優希, 富奥 甘奈, 福田 佳代子, ハキミ ハッサン, 麻田 正仁, 金子 修, 藤田 秋一
    • Organizer
      第96回 日本生化学大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 酵母細胞でのautophagosome膜およびautophagic body膜における膜脂質の微細分布解析2021

    • Author(s)
      山口優希、黒川夕奈、向達汐美、福田佳代子、正谷達謄、藤田秋一
    • Organizer
      第94回 日本生化学大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ヒトmalaria原虫Plasmodium falciparumの細胞膜ではラフト主成分の糖脂質GM3は内葉と外葉の両方に局在する2021

    • Author(s)
      向達汐美、正谷達謄、小西里可子、黒川夕奈、山口優希、富奥甘奈、福田佳代子、Hakimi Hassan、麻田正仁、金子修、藤田秋一
    • Organizer
      第94回 日本生化学大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 急速凍結・凍結割断レプリカ標識(QF-FRL)法を用いた酵母細胞膜におけるホスファチジルイノシトール4,5-二リン酸(PI(4,5)P2)の局在解析による、PI(4,5)P2生成の制御機構の解明2021

    • Author(s)
      黒川夕奈、小西里可子、富奥甘奈、藤田秋一
    • Organizer
      第94回 日本生化学大会
    • Related Report
      2020 Annual Research Report
  • [Remarks] 鹿児島大学 共同獣医学部 分子細胞生物学 藤田秋一研究室

    • URL

      https://www.facebook.com/profile.php?id=100057246648140

    • Related Report
      2021 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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