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Analysis of the regulatory mechanism of virulence expression by the retron containing reverse transcriptase gene in Vibrio cholerae

Research Project

Project/Area Number 18K07113
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionHiroshima University

Principal Investigator

Shimamoto Tadashi  広島大学, 統合生命科学研究科(生), 教授 (90187443)

Co-Investigator(Kenkyū-buntansha) 成谷 宏文  十文字学園女子大学, 人間生活学部, 教授 (30452668)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsレトロン / 逆転写酵素 / msDNA / Vibrio cholerae / Vibrio mimicus / コレラ菌 / arcAB / arcA / arcB / デコイ核酸 / 可動性遺伝因子
Outline of Final Research Achievements

Retron-Vc95, which contains the reverse transcriptase gene (ret) of Vibrio cholerae, has been suggested to be associated with virulence expression. In order to easily monitor the expression of retron, a reporter strain with the β-glucuronidase gene (gusA) inserted under the promoter of retron was created, and the expression of retron was analyzed under various culture conditions. The expression of retron was found to be decreased under various stress conditions, such as the addition of NaCl and iron chelators, and the deficiency of nitrogen and carbon sources.
In addition, the structure of retron-Vm85 in V. mimicus, a bacterium of the same genus as V. cholerae, was clarified, suggesting the possibility of horizontal transmission of retron.

Academic Significance and Societal Importance of the Research Achievements

本研究は研究代表者が始めた病原細菌における逆転写酵素とmsDNAに関する研究成果に基づくものであり,独創的なものである。機能が明らかにされていなかった逆転写酵素とmsDNAおよびレトロンについて,病原細菌を研究している他の研究者はほとんど注目していなかった。本研究によって得られる成果は,病原性発現ネットワークの新たな分子メカニズムを解明する可能性を持っている。また,代表者のmsDNAデコイ核酸仮説(DNAアプタマー仮説)が実証されれば,遺伝子の転写制御研究という基礎的な分野でも,これまでに報告されていない新しい転写制御形式を提唱するものであり各研究分野に与えるインパクトは大きい。

Report

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

    (7 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Int'l Joint Research] Rutgers University/St. Jude Chileren’s Research Hospital(米国)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] ラトガース大学(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Rutgers University(米国)

    • Related Report
      2018 Research-status Report
  • [Presentation] Vibrio mimicusのレトロンの構造と水平伝播の可能性2021

    • Author(s)
      島本 敏,石田 洋二郎,成谷 宏文,島本 整
    • Organizer
      第94回日本細菌学会総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] GusAレポーターシステムを利用したコレラ菌レトロンの発現解析2020

    • Author(s)
      成谷 宏文,張 吟可,Ahmed M. Soliman,島本 敏,島本 整
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Functional characterization of the Arc two-component signal transduction system in Vibrio cholerae2019

    • Author(s)
      Toshi Shimamoto, Zhiqun Yan, Hirofumi Nariya, Tadashi Shimamoto
    • Organizer
      United States-Japan Cooperative Medical Science Program 53rd Joint Panel Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Vibrio mimicus のレトロンの構造と機能解析2018

    • Author(s)
      島本 敏,石田洋二郎,成谷宏文,島本 整
    • Organizer
      第52回ビブリオシンポジウム
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-12-25  

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