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2023 Fiscal Year Research-status Report

Analysis of cell miniaturization under sulfur depletion-Relationship between cyclin degradation and autophagy-

Research Project

Project/Area Number 21K05363
Research InstitutionNagoya University

Principal Investigator

大塚 北斗  名古屋大学, 創薬科学研究科, 助教 (10632151)

Project Period (FY) 2021-04-01 – 2025-03-31
Keywordseclファミリー遺伝子 / COH1 / 栄養飢餓 / 経時寿命 / 性分化
Outline of Annual Research Achievements

分裂酵母の硫黄飢餓下を含む栄養飢餓応答、栄養飢餓に対する細胞周期制御、栄養飢餓応答遺伝子であるecl family遺伝子らの解析を行った。特に、これまでecl family遺伝子の進化的保存性はわかっていなかったが、今回、昆虫病原性真菌であるMetarhizium robertsiiのCOH1という因子がEcl1の機能的ホモログであることを証明できた。また、COH1もEcl1と同様に、真核生物に保存された栄養感知キナーゼ複合体TORC1を強力に抑制することを報告し た。
これらの結果やこれに付随する研究結果から導かれた研究は、以下の論文にまとめ、発表した。
1.Ohtsuka H et al. “Metarhizium robertsii COH1 functionally complements Schizosaccharomyces pombe Ecl family proteins.” Journal of General and Applied Microbiology. (2023). 2.Ohtsuka H et al. “ecl family genes: Factors linking starvation and lifespan extension in Schizosaccharomyces pombe.” Molecular Microbiology. (2023). 3. Maekawa Y et al. "Identification of plb1 mutation that extends longevity via activating Sty1 MAPK in Schizosaccharomyces pombe." Molecular Genetics and Genomics. (2024). 4. Kamada Y et al. "Structure-based engineering of Tor complexes reveals that two types of yeast TORC1 produce distinct phenotypes." Journal of Cell Science. (2024). 5. Ohtsuka H et al. "Low-molecular weight compounds that extend the chronological lifespan of yeasts, Saccharomyces cerevisiae, and Schizosaccharomyces pombe." Advanced Biology. (2024).

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

これまでecl family遺伝子の進化的保存性はわかっていなかったが、今回、昆虫病原性真菌であるMetarhizium robertsiiのCOH1という因子がEcl1の機能的ホモログであることを証明できた。また、COH1もEcl1と同様に、真核生物に保存された栄養感知キナーゼ複合体TORC1を強力に抑制することを報告し た。
これらの結果やこれに付随する研究結果から導かれた研究は、以下の論文にまとめ、発表した。
1.Ohtsuka H et al. “Metarhizium robertsii COH1 functionally complements Schizosaccharomyces pombe Ecl family proteins.” Journal of General and Applied Microbiology. (2023). 2.Ohtsuka H et al. “ecl family genes: Factors linking starvation and lifespan extension in Schizosaccharomyces pombe.” Molecular Microbiology. (2023). 3. Maekawa Y et al. "Identification of plb1 mutation that extends longevity via activating Sty1 MAPK in Schizosaccharomyces pombe." Molecular Genetics and Genomics. (2024). 4. Kamada Y et al. "Structure-based engineering of Tor complexes reveals that two types of yeast TORC1 produce distinct phenotypes." Journal of Cell Science. (2024). 5. Ohtsuka H et al. "Low-molecular weight compounds that extend the chronological lifespan of yeasts, Saccharomyces cerevisiae, and Schizosaccharomyces pombe." Advanced Biology. (2024).

Strategy for Future Research Activity

これまでの解析で、寿命制御遺伝子ecl family 遺伝子がtarget of rapamycin complex 1 (TORC1)を抑制することで、栄養飢餓においてオートファジーを誘導することがわかっている。今回、種を超えてEclタンパク質がTORC1を抑制することがわかった。今後、Ecl1タンパク質らがどのように してTORC1を抑制しているのかを解析する。
また、Ecl1らの分子機構はまだ不明な部分が多いため、その解析も継続する。

  • Research Products

    (14 results)

All 2024 2023

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (9 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] Identification of plb1 mutation that extends longevity via activating Sty1 MAPK in Schizosaccharomyces pombe2024

    • Author(s)
      Maekawa Yasukichi、Matsui Kotaro、Okamoto Keisuke、Shimasaki Takafumi、Ohtsuka Hokuto、Tani Motohiro、Ihara Kunio、Aiba Hirofumi
    • Journal Title

      Molecular Genetics and Genomics

      Volume: 299 Pages: 20

    • DOI

      10.1007/s00438-024-02107-8

    • Peer Reviewed
  • [Journal Article] Structure-based engineering of Tor complexes reveals that two types of yeast TORC1 produce distinct phenotypes2024

    • Author(s)
      Kamada Yoshiaki、Umeda Chiharu、Mukai Yukio、Ohtsuka Hokuto、Otsubo Yoko、Yamashita Akira、Kosugi Takahiro
    • Journal Title

      Journal of Cell Science

      Volume: 137 Pages: jcs261625.

    • DOI

      10.1242/jcs.261625

    • Peer Reviewed / Open Access
  • [Journal Article] Low‐Molecular Weight Compounds that Extend the Chronological Lifespan of Yeasts, Saccharomyces cerevisiae, and Schizosaccharomyces pombe2024

    • Author(s)
      Ohtsuka Hokuto、Shimasaki Takafumi、Aiba Hirofumi
    • Journal Title

      Advanced Biology

      Volume: - Pages: e2400138

    • DOI

      10.1002/adbi.202400138

    • Peer Reviewed / Open Access
  • [Journal Article] Metarhizium robertsii COH1 functionally complements & Schizosaccharomyces pombe& Ecl family proteins2023

    • Author(s)
      Ohtsuka Hokuto、Kawai Sawa、Otsubo Yoko、Shimasaki Takafumi、Yamashita Akira、Aiba Hirofumi
    • Journal Title

      The Journal of General and Applied Microbiology

      Volume: - Pages: -

    • DOI

      10.2323/jgam.2023.09.001

    • Peer Reviewed
  • [Journal Article] ecl< family genes: Factors linking starvation and lifespan extension in Schizosaccharomyces pombe2023

    • Author(s)
      Ohtsuka Hokuto、Otsubo Yoko、Shimasaki Takafumi、Yamashita Akira、Aiba Hirofumi
    • Journal Title

      Molecular Microbiology

      Volume: 120 Pages: 645~657

    • DOI

      10.1111/mmi.15134

    • Peer Reviewed / Open Access
  • [Presentation] 分裂酵母の寿命延長因子Ecl1の糸状菌ホモログの機能解析2023

    • Author(s)
      河井咲和、大塚北斗、大坪瑶子、島崎崇史、山下朗、饗場浩文
    • Organizer
      日本農芸化学会中部支部第196回例会
  • [Presentation] plb1遺伝子変異はSty1 MAPKの活性化を介して分裂酵母の寿命を延長する2023

    • Author(s)
      前川泰吉、松井滉太朗、岡本啓佑、大塚北斗、島崎嵩史、井原邦夫、谷 元洋、饗場浩文
    • Organizer
      日本農芸化学会中部支部第196回例会
  • [Presentation] 分裂酵母bgs1長寿命変異株の解析2023

    • Author(s)
      加藤伸好、田村昌大、松井滉太朗、島崎嵩史、大塚北斗、井原邦夫、饗場浩文
    • Organizer
      酵母遺伝学フォーラム第56回研究報告会
  • [Presentation] ecl+ファミリー遺伝子の寿命延長効果とカゼインキナーゼ2(CK2)の関係について2023

    • Author(s)
      大原公太郎、大塚北斗、島崎嵩史、饗場浩文
    • Organizer
      酵母遺伝学フォーラム第56回研究報告会
  • [Presentation] Characterization of P-type H+-ATPase Pma1 inhibitors that extend chronological lifespan in fission yeast.2023

    • Author(s)
      Yamashita, W., Tamura, M., Hibi, T., Shimasaki, T., Ohtsuka, H., Shibuya, M., Yokoshima, S., Yamamoto, Y., Aiba, H.
    • Organizer
      The 11 th International Fission Yeast Meeting
    • Int'l Joint Research
  • [Presentation] Characterization of nnk1+ that regulates chronological lifespan in fission yeast.2023

    • Author(s)
      Shimasaki, T., Ohtsuka, H., Wada, M., Aiba, H.
    • Organizer
      The 11 th International Fission Yeast Meeting
    • Int'l Joint Research
  • [Presentation] Cdc13 (cyclin B) is degraded by autophagy under sulfur depletion in fission yeast.2023

    • Author(s)
      Ohtsuka, H., Shimasaki, T, Otsubo, Y, Yamashita, A, Murakami, H, Aiba, H.
    • Organizer
      The 11 th International Fission Yeast Meeting
    • Int'l Joint Research
  • [Presentation] Individual roles of Ecl family proteins: Identification and functional analysis of Ecl family members required for sulfur depletion response.2023

    • Author(s)
      Kosaka, A., Ohtsuka, H., Shimasaki, T., Aiba, H.
    • Organizer
      The 11 th International Fission Yeast Meeting
    • Int'l Joint Research
  • [Presentation] The function of Ecl1, the extender of chronological lifespan, is regulated via the phosphorylation of Thr7.2023

    • Author(s)
      Kawai, S., Ohtsuka, H., Ito, Y., Shimasaki, T., Mishiro-Sato, E., Aiba, H.
    • Organizer
      The 11 th International Fission Yeast Meeting
    • Int'l Joint Research

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Published: 2024-12-25  

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