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Analysis of the regulatory system for tRNA gene expression to establish a proper tRNA repertoire.

Research Project

Project/Area Number 20K06490
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionUniversity of Hyogo

Principal Investigator

Yoshihisa Tohru  兵庫県立大学, 理学研究科, 教授 (60212312)

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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordstRNA / 転写制御 / 転写因子 / tRNA検出因子 / tRNAレパートリー
Outline of Research at the Start

翻訳に必須な各tRNAの量比の総体はこれまで静的に保たれると考えられていたが、近年の研究で、生体の内的・外的要因で一定幅で変化することが明らかとなった。しかし、個別のtRNA種の供給(転写)がどのように制御されるかの機構は判っていない。本研究では、個別のtRNA遺伝子(tDNA)の転写制御の機構を、酵母を材料として新たに開発するPol IIIレポーター系を用いて解析、tDNAを個別認識する転写因子や、tRNAの現存量をモニタする因子などの発見を試みる。これによって、今まで明らかでは無かったtRNAの量的制御を供給側で支える仕組みの解明を目指す。

Outline of Final Research Achievements

Accumulating pieces of evidence revealed that tRNAs, essential for translation, is under transcriptional regulation, but their regulatory molecular mechanism has been obscure. To analyze this problem using yeast molecular biological technique, we tried to construct ways for analyze promoter activity of tRNA genes, or tDNAs. First, we adopted RT-qPCR to measure pre-tRNAs with an intron, a primary approximation of transcriptional activity of the corresponding tDNA. Second, we constructed RNAi system where an shRNA against EGFP mRNA is expressed from the tDNA promoter, and tested whether extent of suppression of EGFP expression is correlated with tRNA expression. However, all of our constructs so strongly suppressed EGFP expression that promoter activity of various tDNAs could not be compared.

Academic Significance and Societal Importance of the Research Achievements

本研究は今まで知られていなかった個別tRNA遺伝子の発現制御を解析するための研究基盤の構築を試みた。学術的には、生理条件に応じた個別のtRNA遺伝子の発現制御を検出することはできたが、本来の目的である遺伝学的なスクリーニングに耐えるプロモータ活性の測定計の構築には至らなかった。RNAiやCRISPRiに用いられる低分子non-coding RNAの発現をベースとした検出系では、レポーターmRNAの発現量をかなり正確に調製する必要がある。今後は、tDNAプロモータで転写される機能性RNAが直接検出できる系での検討が必要であろう。

Report

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

    (12 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Six identical tRNATrpCCA genes express a similar amount of mature tRNATrpCCA but unequally contribute to yeast cell growth2022

    • Author(s)
      Sachiko Hayashi, Masaya Matsui, Ayano Ikeda, Tohru Yoshihisa
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 86 Issue: 10 Pages: 1398-1404

    • DOI

      10.1093/bbb/zbac134

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] OTTER, a new method for quantifying absolute amounts of tRNAs2021

    • Author(s)
      Nagai Akihisa、Mori Kohei、Shiomi Yuma、Yoshihisa Tohru
    • Journal Title

      RNA

      Volume: 27 Issue: 5 Pages: 628-640

    • DOI

      10.1261/rna.076489.120

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ribosomal protein S7 ubiquitination during ER stress in yeast is associated with selective mRNA translation and stress outcome2020

    • Author(s)
      Matsuki Yasuko、Matsuo Yoshitaka、Nakano Yu、Iwasaki Shintaro、Yoko Hideyuki、Udagawa Tsuyoshi、Li Sihan、Saeki Yasushi、Yoshihisa Tohru、Tanaka Keiji、Ingolia Nicholas T.、Inada Toshifumi
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 19669-19669

    • DOI

      10.1038/s41598-020-76239-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 出芽酵母におけるtRNAのオートファジー:tRNautophagy2022

    • Author(s)
      吉久 徹、笹田 奈友子、入江 百香
    • Organizer
      第74回日本細胞生物学会大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Multiphasic regulation of tRNA repertoires in budding yeast.2022

    • Author(s)
      Tohru Yoshihisa, Nayuko Sasada, Momoka Irie, Moeka Taniwaki, Akihisa Nagai
    • Organizer
      第23回日本RNA学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Formation and Maintenance of tRNA Repertoires in Saccharomyces cerevisiae2022

    • Author(s)
      Nayuko Sasada, Momoka Irie, Moeka Taniwaki, Masaya Matsui, Ayano Ikeda, Sachiko Hayashi, Akihisa Nagai, Tohru Yoshihisa
    • Organizer
      The 30th Tokyo RNA Club
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 酵母の6つの完全に相同なtRNATrpCCA遺伝子は、等しく成熟tRNATrpCCAを供給するものの、生育に遺伝子座固有の影響を持つ。2022

    • Author(s)
      林紗千子、松井将也、池田彩乃、吉久徹
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Regulation of tRNA repertoires in the budding yeast.2022

    • Author(s)
      Nayuko Sasada, Momoka Irie, Akihisa Nagai, Moeka Taniwaki, Sachiko Hayashi, Tohru Yoshihisa
    • Organizer
      CSH Asia RNA Biology
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Paralogue-specific regulation of RPS7/eS7 mRNAs via the 3’-UTR in budding yeast2022

    • Author(s)
      Sachiko Hayashi, Tohru Yoshihisa
    • Organizer
      第23回日本RNA学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] tL(CAA)遺伝子のイントロンの有無との奇妙な繋がり:出芽酵母でのRps7パラログ選択性と関連した細胞質及びミトコンドリアでの翻訳2022

    • Author(s)
      林紗千子、吉久徹
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 出芽酵母におけるtRNAレパートリーの多面的制御2022

    • Author(s)
      笹田 奈友子、入江 百香、谷脇 萌佳、永井 陽久、吉久 徹
    • Organizer
      日本RNA学会
    • Related Report
      2021 Research-status Report
  • [Presentation] 出芽酵母におけるtRNAのオートファジー:tRNautophagy2022

    • Author(s)
      吉久 徹、笹田 奈友子、入江 百香
    • Organizer
      日本細胞生物学会
    • Related Report
      2021 Research-status Report

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

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