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Study on substrate tRNA recognition mechanisms of multiple subunit tRNA modification enzymes

Research Project

Project/Area Number 20H03211
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43030:Functional biochemistry-related
Research InstitutionEhime University

Principal Investigator

Hori Hiroyuki  愛媛大学, 理工学研究科(工学系), 教授 (20256960)

Co-Investigator(Kenkyū-buntansha) 平田 章  徳島大学, 大学院社会産業理工学研究部(理工学域), 准教授 (60527381)
横川 隆志  岐阜大学, 工学部, 教授 (90242304)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2022: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Keywords酵素 / 核酸 / タンパク質 / RNA
Outline of Research at the Start

tRNA中には、様々な修飾ヌクレオシドがいろいろな位置に存在します。修飾ヌクレオシドの第一義的な役割はタンパク質合成系の制御ですが、スプライシング、プロセシング、RNAの輸送、分解、RNA干渉ともリンクし、発生・分化、発がん、感染、免疫など高次生命現象にも影響します。tRNA修飾酵素群のRNA認識機構と各タンパク質サブユニットの役割を解明します。tRNA修飾酵素の変異は、ヒト遺伝病の原因となり、感染性微生物の中には、tRNA修飾を感染必須因子とするものもいます。したがって、本研究の成果は、生化学・分子生物学のみにとどまらず、医学、薬学、農学、理学、工学等、多方面へ波及するものです。

Outline of Final Research Achievements

The purpose of this study is the clarification of tRNA recognition mechanisms of multiple subunit tRNA modification enzymes. Eukaryotic tRNA methyltransferase complex (Trm11-Trm112 complex) methylates only 20 tRNA molecular species among 43 tRNA species. We have clarified the recognition sites in tRNA of Trm11-Trm112 complex, namely the G10-C25 base pair, CCA terminus, regular size (5 nt) valiable region, and phsphate-ribose backbone around position 38 in tRNA. Furthermore, we have developed a new 4-thiouridine detection system and a new analysis method for tRNA modification enzymes using a next generation DNA sequencer. Moreover, the procols for the later method have been described in Methods in Enxymology. In addition, the knowledges concering THUMP domain has been summarized in a review.

Academic Significance and Societal Importance of the Research Achievements

21世紀に入り、tRNAの修飾ヌクレオシドと修飾酵素の欠損が50種類以上のヒト遺伝病と関係することが判ってきた。したがって、当該領域は、遺伝病の病態の理解、新たな遺伝子診断法や遺伝子治療法の開発に直結する分野となっている。また、tRNA中の修飾ヌクレオシドや修飾酵素は、コレラ菌、チフス菌、レトロウイルスなどの感染必須因子である。ゆえに、tRNAの修飾ヌクレオシドと修飾酵素の研究は感染性微生物防除の観点からも重要である。複合tRNA修飾酵素は精製酵素による解析が難しく、未解明な問題が多い分野であったが、本研究では複合tRNAメチル化酵素の基質tRNA認識機構を明らかにすることができた。

Report

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

    (14 results)

All 2023 2022 2021 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (7 results) Remarks (2 results)

  • [Journal Article] Application of mutational profiling: New functional analyses reveal the tRNA recognition mechanism of tRNA m1A22 methyltransferase2023

    • Author(s)
      Ryota Yamagami, Hiroyuki Hori
    • Journal Title

      Journal of Biological Chemistry

      Volume: 299 Issue: 1 Pages: 102759-102776

    • DOI

      10.1016/j.jbc.2022.102759

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transfer RNA Modification Enzymes with a Thiouridine Synthetase, Methyltransferase and Pseudouridine Synthase (THUMP) Domain and the Nucleosides They Produce in tRNA2023

    • Author(s)
      Hori Hiroyuki
    • Journal Title

      Genes

      Volume: 14 Issue: 2 Pages: 382-382

    • DOI

      10.3390/genes14020382

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Functional analysis of tRNA modification enzymes using mutational profiling2023

    • Author(s)
      Ryota Yamagami, Hiroyuki Hori
    • Journal Title

      Methods in Enzymology

      Volume: - Pages: 69-101

    • DOI

      10.1016/bs.mie.2023.02.021

    • ISBN
      9780443239762
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Required Elements in tRNA for Methylation by the Eukaryotic tRNA (Guanine- N2-) Methyltransferase (Trm11-Trm112 Complex)2022

    • Author(s)
      Yu Nishida, Shiho Ohmori, Risa Kakizono, Kunpei Kawai, Miyu Mamba, Kazuki Okada, Ryota Yamagami, Akira Hirata, Hiroyuki Hori
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 23 Issue: 7 Pages: 4046-4046

    • DOI

      10.3390/ijms23074046

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A selective and sensitive detection system for 4-thiouridine modification in RNA2022

    • Author(s)
      Sugio Yuzuru、Yamagami Ryota、Shigi Naoki、Hori Hiroyuki
    • Journal Title

      RNA

      Volume: 29 Issue: 2 Pages: 241-251

    • DOI

      10.1261/rna.079445.122

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Required Elements in tRNA for Methylation by the Eukaryotic tRNA (Guanine-N2-) Methyltransferase (Trm11-Trm112 Complex)2022

    • Author(s)
      Kumpei Kawai, Yu Nishida, Shiho Ohmori, Risa Kakizono, Miyu Namba, Kazuki Okada, Ryota Yamagami, Akira Hirata, Hiroyuki Hori
    • Organizer
      第23回日本RNA学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Enzymatic properties of Thermoplasma acidophilum Trm56, which has the longest C-terminal region in the SPOUT RNA methyltransferase superfamily2022

    • Author(s)
      Hiroyuki Hori, Shyuhei Fukumoto, Takahiro Hasegawa, Mami Ototake, Shizuka Moriguchi, Miyu Namba, Ryota Yamagami, Takuya Kawamura, Akira Hirata
    • Organizer
      第23回日本RNA学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Detection of 4-thiouridine-containing RNAs using chemiluminescence2022

    • Author(s)
      Yuzuru Sugio, Ryota Yamagami, Hiroyuki Hori
    • Organizer
      第23回日本RNA学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 化学発光を利用したs4U含有RNAの検出法の応用例2022

    • Author(s)
      杉尾 譲, 山上龍太, 堀 弘幸
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Escherichia coli tRNA (Gm18) methyltransferase (TrmH) recognizes the location of methylation site (G18) in the D-loop for the selection of substrate tRNA.2021

    • Author(s)
      Yoh Kohno, Asako Ito, Aya Okamoto, Ryota Yamagami, Akira Hirata, Hiroyuki Hori
    • Organizer
      第22回日本RNA学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超好熱性アーキアThermococcus kodakarensis由来tRNA メチル化酵素Trm14の機能解明について2021

    • Author(s)
      野利本 剛, 空 磨奈伽, 平田 章, 堀 弘幸
    • Organizer
      第33回日本Archaea研究会講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 超好熱性アーキアThermococcus kodakarensis由来tRNA m2G6 メチル化酵素Trm14の 幅広い基質特異性2021

    • Author(s)
      野利本 剛, 空 磨奈伽, 平田 章, 堀 弘幸
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 応用生物化学研究室 ホームページ

    • URL

      http://www.ach.ehime-u.ac.jp/bchem/

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
  • [Remarks] 愛媛大学応用化学科応用生物化学研究室ホームページ

    • URL

      http://www.ach.ehime-u.ac.jp/bchem/

    • Related Report
      2020 Annual Research Report

URL: 

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

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