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Role of nuclear membrane protein Lem2-Bqt4 in very-long-chain fatty acid synthesis

Research Project

Project/Area Number 19K06489
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionOsaka University

Principal Investigator

Hirano Yasuhiro  大阪大学, 生命機能研究科, 特任講師 (10508641)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords核膜 / Lem2 / Bqt4 / 極長鎖脂肪酸 / Elo2 / PCS1
Outline of Research at the Start

本研究では核膜タンパク質であるlem2bqt4二重破壊によって引き起こされる合成致死性を極長鎖脂肪酸合成酵素Elo2が相補する分子メカニズムを遺伝学・分子生物学・細胞生物学・生化学的手法を用いて解析することにより、極長鎖脂肪酸とLem2-Bqt4の機能的関連を明らかにする。極長鎖脂肪酸の多くはスフィンゴ脂質やセラミドとして主に細胞膜に存在し、神経軸策形成や皮膚の保湿バリアに必須の成分であるが、核膜における役割はこれまで知られていない。本研究は極長鎖脂肪酸の細胞内膜系全般の機能維持における役割を示唆しており、他分野への波及効果も期待される。

Outline of Final Research Achievements

Inner nuclear membrane proteins play an important role for cell functionalities such as differentiation. This study aimed to understand why and how the double deletion of inner nuclear membrane proteins, Lem2 and Bqt4, confer synthetic lethal phenotype. This study clarified that the double deletion of Lem2 and Bqt4 caused the breakage of nuclear membrane accompanied by the leakage of nuclear protein. Overexpression of the very-long-chain fatty acids synthase Elo2 rescued these phenotypes, indicating that inner nuclear membrane proteins involve in maintaining nuclear membrane lipid composition.

Academic Significance and Societal Importance of the Research Achievements

本研究で核膜が破れず機能するために核膜タンパク質が必須であることが分かった。核膜が破れずにいるためには脂質膜組成比が重要となることもわかった。本研究で明らかになった極長鎖脂肪酸は生体内の総脂肪酸量のわずか数%しかないのにも関わらず必須の機能を持つ重要な脂質である。極長鎖脂肪酸はスフィンゴシンとセラミドと呼ばれる脂質を形成し、皮膚を乾燥から防ぐバリア機能を持つ。これまでセラミドは主に細胞膜に存在すると考えられてきたが、核膜でも核内環境維持のためのバリア機能を果たすことが考えられた。

Report

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

    (19 results)

All 2022 2021 2020 2019

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 8 results) Presentation (11 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Mobility of kinetochore proteins measured by FRAP analysis in living cells2022

    • Author(s)
      Watanabe Reito、Hirano Yasuhiro、Hara Masatoshi、Hiraoka Yasushi、Fukagawa Tatsuo
    • Journal Title

      Chromosome Research

      Volume: 30 Issue: 1 Pages: 43-57

    • DOI

      10.1007/s10577-021-09678-x

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transfected plasmid DNA is incorporated into the nucleus via nuclear envelope reformation at telophase2022

    • Author(s)
      Haraguchi Tokuko、Koujin Takako、Shindo Tomoko、Sukriye Bilir、Osakada Hiroko、Nishimura Kohei、Hirano Yasuhiro、Asakawa Haruhiko、Mori Chie、Kobayashi Shouhei、Okada Yasushi、Chikashige Yuji、Fukagawa Tatsuo、Shibata Shinsuke、Hiraoka Yasushi
    • Journal Title

      Communications Biology

      Volume: 5 Issue: 1 Pages: 78-88

    • DOI

      10.1038/s42003-022-03021-8

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chromatin loading of MCM hexamers is associated with di-/tri-methylation of histone H4K20 toward S phase entry.2021

    • Author(s)
      Hayashi-Takanaka Y, Hayashi Y, Hirano Y, Miyawaki-Kuwakado A, Ohkawa Y, Obuse C, Kimura H, Haraguchi T, Hiraoka Y.
    • Journal Title

      Nucleic Acids Res.

      Volume: 49 Issue: 21 Pages: 12152-12166

    • DOI

      10.1093/nar/gkab1068

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Lem2 and Lnp1 maintain the membrane boundary between the nuclear envelope and endoplasmic reticulum2020

    • Author(s)
      Hirano Yasuhiro、Kinugasa Yasuha、Osakada Hiroko、Shindo Tomoko、Kubota Yoshino、Shibata Shinsuke、Haraguchi Tokuko、Hiraoka Yasushi
    • Journal Title

      Communications Biology

      Volume: 3 Issue: 1 Pages: 276-276

    • DOI

      10.1038/s42003-020-0999-9

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nuclear Envelope Proteins Modulating the Heterochromatin Formation and Functions in Fission Yeast2020

    • Author(s)
      Hirano Yasuhiro、Asakawa Haruhiko、Sakuno Takeshi、Haraguchi Tokuko、Hiraoka Yasushi
    • Journal Title

      Cells

      Volume: 9 Issue: 8 Pages: 1908-1908

    • DOI

      10.3390/cells9081908

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Intracellular ATP levels influence cell fates in Dictyostelium discoideum differentiation2020

    • Author(s)
      Hiraoka Haruka、Nakano Tadashi、Kuwana Satoshi、Fukuzawa Masashi、Hirano Yasuhiro、Ueda Masahiro、Haraguchi Tokuko、Hiraoka Yasushi
    • Journal Title

      Genes to Cells

      Volume: - Issue: 5 Pages: 312-326

    • DOI

      10.1111/gtc.12763

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Human Ebp1 rescues the synthetic lethal growth of fission yeast cells lacking Cdb4 and Nup1842020

    • Author(s)
      Osemwenkhae Osaretin P.、Sakuno Takeshi、Hirano Yasuhiro、Asakawa Haruhiko、Hayashi‐Takanaka Yoko、Haraguchi Tokuko、Hiraoka Yasushi
    • Journal Title

      Genes to Cells

      Volume: - Issue: 4 Pages: 288-295

    • DOI

      10.1111/gtc.12757

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The very-long-chain fatty acid elongase Elo2 rescues lethal defects associated with loss of the nuclear barrier function in fission yeast cells2019

    • Author(s)
      Kinugasa Yasuha、Hirano Yasuhiro、Sawai Megumi、Ohno Yusuke、Shindo Tomoko、Asakawa Haruhiko、Chikashige Yuji、Shibata Shinsuke、Kihara Akio、Haraguchi Tokuko、Hiraoka Yasushi
    • Journal Title

      Journal of Cell Science

      Volume: 132 Issue: 10 Pages: 229021-229021

    • DOI

      10.1242/jcs.229021

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] トランスフェクションされた外来DNAは細胞分裂終期の核膜再形成を介して核内に入る2021

    • Author(s)
      平野泰弘、荒神尚子、信藤知子、芝田晋介、淺川東彦、平岡泰、原口徳子
    • Organizer
      第73回日本細胞生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] G1期のMCM複合体のクロマチン結合におけるヒストンH4K20メチル化修飾の役割2021

    • Author(s)
      林陽子、平野泰弘、原口徳子、平岡泰
    • Organizer
      第73回日本細胞生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 非ウイルスベクターを用いてトランスフェクションされた外来DNAは細胞分裂終期での核膜再形成を介して核内に入る2021

    • Author(s)
      平野泰弘、荒神尚子、信藤知子、芝田晋介、淺川東彦、平岡泰、原口徳子
    • Organizer
      第44回分子生物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Inner nuclear membrane protein Bqt4 is degraded by a Doa10-dependent proteasomal pathway to prevent nuclear membrane deformation2021

    • Author(s)
      Toan Khanh Le, Yasuhiro Hirano, Tokuko Haraguchi and Yasushi Hiraoka
    • Organizer
      第44回分子生物学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] FRAP解析によるキネトコア分子の細胞周期依存的ダイナミクス2020

    • Author(s)
      渡邊励人、平野泰弘、原昌稔、深川竜郎
    • Organizer
      第43回 日本分子生物学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] FRAP解析により明らかにする細胞周期の進行に伴うキネトコアの構造変化2020

    • Author(s)
      渡邊励人、平野泰弘、原昌稔、深川竜郎
    • Organizer
      日本遺伝学会第92回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] DNA複製におけるヒストンH4アセチル化の役割2019

    • Author(s)
      平岡泰、Osaretin P. Osemwenkae、吉本翔一、平野泰弘、作野剛士、淺川東彦、原口徳子
    • Organizer
      第37回染色体ワークショップ・第18回細胞核ダイナミクス研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] Lem2による核膜形態維持機構とゲノム安定化における役割2019

    • Author(s)
      平野泰弘、衣笠泰葉、原口徳子、平岡泰
    • Organizer
      第37回染色体ワークショップ・第18回細胞核ダイナミクス研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] Lem2と Lnp1は Vps4-ESCRT-III複合体の機能を制御することで核膜-小胞体構造を維持する2019

    • Author(s)
      平野泰弘、衣笠泰葉、原口徳子、平岡泰
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Lem2 and Lnp1 cooperatively maintain the nuclear membrane integrity through ESCRT-III functions2019

    • Author(s)
      Hirano Y, Kinugasa Y, Osakada H, Shindo T, Kubota Y, Shibata S, Haraguchi T, Hiraoka Y
    • Organizer
      The International Fission Yeast Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Very-long-chain fatty acid elongase Elo2 rescues chromosomal defects associated with loss of nuclear membrane protein Lem22019

    • Author(s)
      Kinugasa Y, Hirano Y, Asakawa H, Chikashige Y, Haraguchi T, Hiraoka Y
    • Organizer
      The International Fission Yeast Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-12-25  

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