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Studies on chemical recognition mechanisms of environmental bacteria using a number of chemosensors

Research Project

Project/Area Number 18H02130
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 38020:Applied microbiology-related
Research InstitutionHiroshima University

Principal Investigator

Kato Junichi  広島大学, 統合生命科学研究科(先), 教授 (90231258)

Co-Investigator(Kenkyū-buntansha) 川崎 健  広島大学, 統合生命科学研究科(先), 助教 (00510299)
緋田 安希子  広島大学, 統合生命科学研究科(先), 助教 (70825760)
田島 誉久  広島大学, 統合生命科学研究科(先), 助教 (80571116)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywordsケモセンサー / 物質認識機構 / 走化性 / 青枯病菌 / 環境細菌 / 生物相互作用
Outline of Final Research Achievements

Ralstonia solanacearum possesses 22 methyl-accepting chemotaxis proteins (MCPs). MCPs for amino acids, L-malate and boric acid are functional in 22-mcp-knockout mutant (POC22), while MCPs for citrate (McpC) and tartrate (McpT) are not functional. Complementation analysis using POC22 harboring mcpC in its genome revealed spontaneous expression of mcpC and mcpT led to restoration of function of McpC and McpT due to formation of McpC-McpT heterodimer or heterotrimer of homodimers. Complementation analysis using several multiple mcp-knockout mutants and plasmid harboring mcpC suggested that McpC are functionally integrated into sensor-array depending on sizes of sensor-arrays.

Academic Significance and Societal Importance of the Research Achievements

環境細菌の感染や共生などの生物相互作用に走化性は関与している。とするならば、走化性を制御して環境細菌の生物相互作用を制御することもできよう。たとえば、新な方法で植物感染の防除、植物成長促進の効率化を図ることが期待できる。R. solanacearumのように環境細菌の多くは多数の走化性センサーを有する。一方、走化性分子機構の解明はセンサーを少数しか持たない腸内細菌を中心に行われてきた。本研究から、環境細菌の走化性機構は腸内細菌で理解されてきた機構から予想がつかないものがあることが分かってきた。本研究により環境細菌の走化性の理解、そして環境細菌の環境での振る舞いの制御に貢献し得る結果が得られた。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (11 results)

All 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (4 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Int'l Joint Research] モンクット工科大学ラトクラバン校(タイ)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] チュラロンコン大学理学部生化学科/モンクット工科大学ラトクラバン校(タイ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] チュラロンコン大学理学部生化学科(タイ)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Chemotactic disruption as a method to control bacterial wilt caused by Ralstonia pseudosolanacearum2020

    • Author(s)
      Tunchai Mattana、Hida Akiko、Oku Shota、Tajima Takahisa、Kato Junichi
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 85 Issue: 3 Pages: 697-702

    • DOI

      10.1093/bbb/zbaa065

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characterization of methyl-accepting chemotaxis proteins (MCPs) for amino acids in plant-growth-promoting rhizobacterium Pseudomonas protegens CHA0 and enhancement of amino acid chemotaxis by MCP genes overexpression2020

    • Author(s)
      Hida Akiko、Oku Shota、Miura Manami、Matsuda Hiroki、Tajima Takahisa、Kato Junichi
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 84 Issue: 9 Pages: 1948-1957

    • DOI

      10.1080/09168451.2020.1780112

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two citrate chemoreceptors involved in chemotaxis to citrate and/or citrate-metal complexes in Ralstonia pseudosolanacearum.2019

    • Author(s)
      Hida, A., Tajima, T., Kato, J.
    • Journal Title

      J. Biosci. Bioeng.

      Volume: 127 Issue: 2 Pages: 169-175

    • DOI

      10.1016/j.jbiosc.2018.07.014

    • NAID

      40021813916

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 青枯病菌<i>Ralstonia solanacearum</i> の 植物感染最初期過程における走化性の役割2018

    • Author(s)
      緋田安季子, 奥正太, 田島誉久, 加藤純一
    • Journal Title

      Soil Microorganisms

      Volume: 72 Issue: 2 Pages: 84-89

    • DOI

      10.18946/jssm.72.2_84

    • NAID

      130007498125

    • ISSN
      0912-2184, 2189-6518
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] Chemotaxis involved in plant infection in Ralstonia solanacearum and control of plant infection by intervening chemotaxis2019

    • Author(s)
      Akiko Hida, Tunchai Mattana, Takhisa Tajima, Junichi Kato
    • Organizer
      11th YU-RCTMR Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A. Toward direct regulation of bacterial behaviors through their environment recognition mechanisms.2018

    • Author(s)
      Kato, J., Vangnai, A., Hida, A., Tajima, T.
    • Organizer
      Thailand Research EXPO-CCP International Joint Seminar
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Investigation of microbial mechanisms involving bioremediation of hazardous chemicals and microbe-plant interaction for improvement of ecosystem and environmental reclamation2018

    • Author(s)
      Kato, J., Tajima, T., Oku, S., Hida, A., Mahipant, G., Sipahutar, M., Silambarasan, S., Piapukiew, J., Vangnai, A.
    • Organizer
      CCP Final Joint Seminar
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 複数発現でのみ機能発現する走化性センサータンパク質の特性化2018

    • Author(s)
      堀雄一、緋田安季子、Mattana Tunchai、田島誉久、加藤純一
    • Organizer
      第70回日本生物工学会大会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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