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c-di-GMP signaling network underpinning lifestyle transitions in response to incident light color

Research Project

Project/Area Number 17K15244
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Applied microbiology
Research InstitutionThe University of Tokyo

Principal Investigator

Enomoto Gen  東京大学, 大学院総合文化研究科, 学術研究員 (20780670)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords環境応答 / シグナル伝達 / シアノバクテリア / c-di-GMP / バイオフィルム / シアノバクテリオクロム / 光受容体 / 環境・細胞応答 / 発現制御
Outline of Final Research Achievements

I previously reported that cyclic dimeric GMP (c-di-GMP) signaling governs light color-specific induction of cell aggregation of a thermophilic cyanobacterium. In this study, I aim to reveal the whole c-di-GMP signaling network, focusing on how various proteins work together in a cell. Phenotypic analyses of gene disruption mutants and systematic gene expression analyses led to the identification of Tlr1612 as the main repressor of cell aggregation. I also discovered that heterogeneity of c-di-GMP levels may be induced in a cell aggregate under natural light conditions.

Academic Significance and Societal Importance of the Research Achievements

サイクリックジグアニル酸 (c-di-GMP) はバクテリアに広く存在する二次メッセンジャーであり、様々な機能を調節して生育様式の転換を司る。制御する機能の重要性は普遍的にも関わらず、病原菌以外では研究が進んでいない。本研究はc-di-GMPの機能の普遍性を理解する上で不可欠な、シアノバクテリアにおけるc-di-GMPの役割の分子基盤の構築に貢献した。またシアノバクテリアは自然界で微生物マットを形成していることが多いものの、従来の研究は均一な液体培養を用いたものが多い。本研究は、生態学的に重要である群集としての生育様式におけるシアノバクテリアの不均一な振る舞いについて新たな仮説を提唱した。

Report

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

    (9 results)

All 2018 2017 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] フライブルク大学(ドイツ)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Tlr1612 is the major repressor of cell aggregation in the light-color-dependent c-di-GMP signaling network of Thermosynechococcus vulcanus2018

    • Author(s)
      Enomoto Gen、Okuda Yukiko、Ikeuchi Masahiko
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 5338-5338

    • DOI

      10.1038/s41598-018-23628-4

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Blue/green light responsive cyanobacteriochromes are cell shade sensors to adjust c-di-GMP levels according to cell depth in cyanobacterial community2018

    • Author(s)
      Gen Enomoto, Annegret Wilde, and Masahiko Ikeuchi
    • Organizer
      Nucleotide Second Messenger Signaling in Bacteria SPP 1879 International Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Blue/green light responsive cyanobacteriochromes are cell shade sensors to adjust c-di-GMP levels according to cell depth in cyanobacterial community2018

    • Author(s)
      Gen Enomoto, Annegret Wilde, and Masahiko Ikeuchi
    • Organizer
      3rd Early Career Researcher Symposium on Cyanobacteria
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Blue/green light responsive cyanobacteriochromes are cell shade sensors to evoke heterogeneity in cyanobacterial community under photosynthetic red light2018

    • Author(s)
      Gen Enomoto and Masahiko Ikeuchi
    • Organizer
      Photosensory Receptors and Signal Transduction (GRC) Gordon Research Conference
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Blue/green light responsive cyanobacteriochromes are cell shade sensors to evoke heterogeneity in cyanobacterial community under photosynthetic red light2018

    • Author(s)
      Gen Enomoto and Masahiko Ikeuchi
    • Organizer
      Photosensory Receptors and Signal Transduction (GRS) Gordon Research Seminar
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Cyanobacteriochrome-mediated blue/green light signaling is a population density-sensing system under photosynthesis-driving red light2017

    • Author(s)
      Gen Enomoto and Masahiko Ikeuchi
    • Organizer
      10th European Workshop on the Molecular Biology of Cyanobacteria
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 青/緑色光感知型シアノバクテリオクロムは細胞密度を感知しラン藻コミュニティーの挙動を光合成可能な赤色光下で制御する2017

    • Author(s)
      榎本元、池内昌彦
    • Organizer
      ラン藻の分子生物学2017
    • Related Report
      2017 Research-status Report
  • [Presentation] シアノバクテリオクロムによる青/緑色光依存的な生育様式の転換は細胞密度感知機構として機能し光合成に駆動される2017

    • Author(s)
      榎本元、池内昌彦
    • Organizer
      第8回日本光合成学会年会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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