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Mechanism for acquisition and maintenance of intracellular symbionts in deep-sea bivalves.

Research Project

Project/Area Number 20K06779
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45020:Evolutionary biology-related
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

Yoshida Takao  国立研究開発法人海洋研究開発機構, 地球環境部門(海洋生物環境影響研究センター), 主任研究員 (60399566)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords細胞内共生 / 共生者の獲得 / 共生の維持 / 共生 / 細胞内 / 相互作用
Outline of Research at the Start

深海の熱水域や湧水域の化学合成生態系に優先する動物の多くは、自身の細胞内に化学合成細菌(以後、共生菌と呼ぶ)を共生させ、共生菌が合成する物質を得ていると考えられている。共生菌は、どのようにして宿主となる動物の細胞内に入り込み、維持されるのか、そのメカニズムは解っていない。本研究では、深海性の二枚貝シンカイヒバリガイを用いて、共生菌の獲得と維持に関わるメカニズムについて解析する。

Outline of Final Research Achievements

To understand the molecular mechanism for maintaining the endosymbiosis between host animal and chemosynthetic bacteria, we examined transcriptome and the localization of host factors using immunohistochemistry with antibodies were analyzed in mussel gill. We found that host bivalve acquires its symbiont from the environment by phagocytosis of gill epithelial cells. We also identified that host nutrient sensing factor was controlled the symbiont phagosome digestion. The regulation mechanism of phagosome digestion by host nutrient sensing factor is key for maintaining animal-microbe intracellular nutritional symbiosis.

Academic Significance and Societal Importance of the Research Achievements

動物の細胞内に微生物が共生する共生系では、宿主である動物が共生者である微生物を細胞内に取り込んだ上で、取り込んだ微生物が細胞内で勝手な振る舞いをしないように制御して共生系を維持する必要がある。本研究では、宿主が食作用により微生物を種類を選ばずに細胞内に取り込むが消化される、一方で、共生者となる微生物は、細胞内で消化されずに維持されることを見出した。この共生者の維持に関与する宿主の因子を新たに同定し、それが宿主の微生物からの栄養摂取と関連することを明らかにした。本研究は、細胞内共生系への生物適応システムの実態を理解するのに貢献する。

Report

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

    (6 results)

All 2023 2022 2021

All Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 4 results)

  • [Journal Article] Heterologous expression and functional characterization of cysteamine dioxygenase from the deep-sea mussel Bathymodiolus septemdierum2023

    • Author(s)
      Yoda Kotaro、Takagi Toshiyuki、Koito Tomoko、Okai Masahiko、Makita Hiroko、Mitsunobu Satoshi、Yoshida Takao、Inoue Koji
    • Journal Title

      Fisheries Science

      Volume: 89 Issue: 3 Pages: 387-397

    • DOI

      10.1007/s12562-023-01674-w

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phagocytosis of exogenous bacteria by gill epithelial cells in the deep-sea symbiotic mussel Bathymodiolus japonicus2022

    • Author(s)
      Tame Akihiro、Maruyama Tadashi、Yoshida Takao
    • Journal Title

      Royal Society Open Science

      Volume: 9 Issue: 5 Pages: 2113841-14

    • DOI

      10.1098/rsos.211384

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular detection of a novel perkinsid associated with the deep‐sea clam Phreagena okutanii2022

    • Author(s)
      Takishita Kiyotaka、Ikuta Tetsuro、Komatsu Miho、Sakaba Norika、Yoshida Takao、Otsubo Mayuko
    • Journal Title

      Journal of Eukaryotic Microbiology

      Volume: 69 Issue: 4

    • DOI

      10.1111/jeu.12917

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Heterologous expression and biochemical comparison of two homologous SoxX proteins of endosymbiotic Candidatus Vesicomyosocius okutanii and free-living Hydrogenovibrio crunogenus from deep-sea environments2022

    • Author(s)
      Fujii Sotaro、Somei Kimiko、Asaeda Yuka、Igawa Takeshi、Hattori Keiyu、Yoshida Takao、Sambongi Yoshihiro
    • Journal Title

      Protein Expression and Purification

      Volume: 200 Pages: 106157-106157

    • DOI

      10.1016/j.pep.2022.106157

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chloroplast acquisition without the gene transfer in kleptoplastic sea slugs, Plakobranchus ocellatus2021

    • Author(s)
      Maeda Taro、Takahashi Shunichi、Yoshida Takao、Shimamura Shigeru、Takaki Yoshihiro、Nagai Yukiko、Toyoda Atsushi、Suzuki Yutaka、Arimoto Asuka、Ishii Hisaki、Satoh Nori、Nishiyama Tomoaki、Hasebe Mitsuyasu、Maruyama Tadashi、Minagawa Jun、Obokata Junichi、Shigenobu Shuji
    • Journal Title

      eLife

      Volume: 10 Pages: 1-32

    • DOI

      10.7554/elife.60176

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inside or out? Clonal thiotrophic symbiont populations occupy deep-sea mussel bacteriocytes with pathways connecting to the external environment2021

    • Author(s)
      Tetsuro Ikuta, Yuka Amari, Akihiro Tame, Yoshihiro Takaki, Miwako Tsuda, Ryo Iizuka, Takashi Funatsu, Takao Yoshida
    • Journal Title

      ISME Communications

      Volume: 1 Issue: 1 Pages: 38-38

    • DOI

      10.1038/s43705-021-00043-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2020-04-28   Modified: 2024-01-30  

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