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Novel continuous metabolic reactions through base-pairing interaction between operon mRNAs and its application

Research Project

Project/Area Number 21K19063
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 38:Agricultural chemistry and related fields
Research InstitutionUniversity of Tsukuba

Principal Investigator

Miyakoshi Masatoshi  筑波大学, 医学医療系, 准教授 (60755809)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2023: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords転写後調節 / small RNA / 3'UTR / オペロン / 代謝 / 3´UTR
Outline of Research at the Start

先行研究により、大腸菌・サルモネラのTCAサイクル酵素群をコードするsucABCDオペロンmRNAの3´UTRと、酢酸代謝経路をコードするackA-ptaオペロンmRNAの5´UTRが塩基対形成することを明らかにした。リボソームはトランス翻訳機構によりmRNA分子間を乗り換えて翻訳を継続することが可能である。sucABCD mRNAとackA-pta mRNAが実際に大腸菌細胞内で共局在していることを1分子FISH法で解析し、トランス翻訳機構が2分子のmRNA間でも成立することを検証する。

Outline of Final Research Achievements

Prokaryotic operon mRNAs generate small RNAs (sRNAs) from their 3´UTRs. In this study, we examine whether sRNAs processed from the 3´UTR of mRNAs base-pair with target mRNAs, or whether mRNAs with regulatory sequences in the 3´UTR themselves base-pair with target mRNAs. We demonstrate that target repression does not occur when the RNase E cleavage site immediately downstream of the mRNA stop codon is mutated. This indicates that post-transcriptional regulation occurs by base-pairing with the target mRNA of the processed sRNA, not with the mRNA.

Academic Significance and Societal Importance of the Research Achievements

本研究は、原核生物のオペロンmRNAの3´UTRに由来するsRNAが、標的遺伝子の転写後調節を行うためにはプロセシングを受けて切り離される必要があり、3'UTRがmRNAから切り離されない状態では標的遺伝子の抑制が起きないことを示した。原核生物の遺伝子発現制御において、転写によって生成する1mRNAがタンパク質を翻訳するだけではなく、同時にプロセシングを経て転写後調節機能を持つsRNAを生成することを明らかにすることができた。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2024 2022

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

  • [Journal Article] Multilayered regulation of amino acid metabolism in Escherichia coli2024

    • Author(s)
      Miyakoshi Masatoshi
    • Journal Title

      Current Opinion in Microbiology

      Volume: 77 Pages: 102406-102406

    • DOI

      10.1016/j.mib.2023.102406

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Glutamine synthetase mRNA releases sRNA from its 3′UTR to regulate carbon/nitrogen metabolic balance in Enterobacteriaceae2022

    • Author(s)
      Miyakoshi Masatoshi、Morita Teppei、Kobayashi Asaki、Berger Anna、Takahashi Hiroki、Gotoh Yasuhiro、Hayashi Tetsuya、Tanaka Kan
    • Journal Title

      eLife

      Volume: 11

    • DOI

      10.7554/elife.82411

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Exploring the cellular localization and processing of the 3'-UTR derived GlnZ sRNA by super-resolution imaging in Escherichia coli2022

    • Author(s)
      ルジャー 朝紀、竹下 典男、宮腰 昌利
    • Organizer
      第18回大腸菌研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] Insights into the processing of the GlnZ small RNA from its parental glnA mRNA using super-resolution imaging in E. coli2022

    • Author(s)
      ルジャー 朝紀、竹下 典男、宮腰 昌利
    • Organizer
      第16回細菌学若手コロッセウム
    • Related Report
      2022 Research-status Report
  • [Presentation] Exploring GcvB sRNA cellular localization and RNA target repartition by super-resolution imaging in Escherichia coli.2022

    • Author(s)
      Lejars A., Takeshita N., Miyakoshi M.
    • Organizer
      RNA & Microbes 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-07-13   Modified: 2025-01-30  

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