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Elucidation of a novel regulatory mechanism of transposon transposition

Research Project

Project/Area Number 21K06008
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 InstitutionHokkaido University

Principal Investigator

Ito Hidetaka  北海道大学, 理学研究院, 准教授 (70582295)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsトランスポゾン / エピジェネティクス / シロイヌナズナ
Outline of Research at the Start

本研究では、シロイヌナズナの変異体を用いてトランスポゾンの新規の転移制御機構を解明することが目的である。本研究では、この新規の転移制御機構を解明するため、原因遺伝子を同定し、この制御の作用経路を明らかにする。また、この制御の分子メカニズムを明らかにするため、同定された因子と相互作用する因子の同定を行う。

Outline of Final Research Achievements

Transposons and repetitive sequences are usually suppressed by DNA methylation or histone modifications, preventing transposition. However, our previous study found that ONSEN transposition efficiency and frequency do not always correlate with transcription levels, suggesting other factors are involved in its regulation. We identified a mutant, screen1, where ONSEN transcription levels are unchanged from the wild type, but transgenerational transposition occurs. This indicates a novel regulatory mechanism at the genomic insertion level. We screened candidate genes for this mechanism but found no ONSEN transposition. The causative factor for screen1 is located between 5.3 Mb and 8.9 Mb on chromosome 3, and we are currently analyzing TED-seq results to identify the responsible genes.

Academic Significance and Societal Importance of the Research Achievements

本研究の学術的意義は、トランスポゾンの転移制御メカニズムを解明し、ゲノムの安定性や進化の理解を深める点にある。特にエピジェネティクス非依存的な制御機構の解明は新たな視点を提供し、植物の環境応答メカニズムの理解に寄与する。社会的意義としては、高温ストレスに強い作物の育成に役立ち、気候変動対策に貢献するほか、遺伝子編集技術の安全性向上にも寄与する。また、生物多様性や進化の理解を促進する。

Report

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

    (15 results)

All 2024 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (10 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Regulatory mechanism of heat-active retrotransposons by the SET domain protein SUVH22024

    • Author(s)
      Niu Xiaoying、Ge Zhiyu、Ito Hidetaka
    • Journal Title

      Frontiers in Plant Science

      Volume: 15 Pages: 1-11

    • DOI

      10.3389/fpls.2024.1355626

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Diversity and strategies of environmental stress-responsive transposons in plants2022

    • Author(s)
      Ito Hidetaka
    • Journal Title

      Genes & Genetic Systems

      Volume: 97 Issue: 4 Pages: 167-167

    • DOI

      10.1266/ggs.97.167

    • ISSN
      1341-7568, 1880-5779
    • Year and Date
      2022-08-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Environmental stress and transposons in plants2022

    • Author(s)
      Ito Hidetaka
    • Journal Title

      Genes & Genetic Systems

      Volume: 97 Issue: 4 Pages: 169-175

    • DOI

      10.1266/ggs.22-00045

    • ISSN
      1341-7568, 1880-5779
    • Year and Date
      2022-08-01
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Epigenetic regulation of ecotype-specific expression of the heat-activated transposon ONSEN2022

    • Author(s)
      Nozawa Kosuke、Masuda Seiji、Saze Hidetoshi、Ikeda Yoko、Suzuki Takamasa、Takagi Hiroki、Tanaka Keisuke、Ohama Naohiko、Niu Xiaoying、Kato Atsushi、Ito Hidetaka
    • Journal Title

      Frontiers in Plant Science

      Volume: 13 Pages: 1048957-1048957

    • DOI

      10.3389/fpls.2022.899105

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Regulatory mechanism of a heat-activated retrotransposon by DDR complex in Arabidopsis thaliana2022

    • Author(s)
      Niu Xiaoying、Chen Lu、Kato Atsushi、Ito Hidetaka
    • Journal Title

      Frontiers in Plant Science

      Volume: 13 Pages: 899105-899105

    • DOI

      10.3389/fpls.2022.1048957

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 熱応答性トランスポゾンONSENの転移による胚軸異常伸長変異体の解析2024

    • Author(s)
      Ryu Hasegawa, Hidetaka Ito
    • Organizer
      第65回日本植物生理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] The transpositional activity of ONSEN transposons varies among different mutants in the RdDM-related pathways2023

    • Author(s)
      SUN XINGYU, Yui Hayshi, Hidetaka.Ito
    • Organizer
      日本遺伝学会第95回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] シロイヌナズナにおける熱活性型レトロトランスポゾンの制御機構の解明2023

    • Author(s)
      牛小蛍, 伊藤秀臣
    • Organizer
      日本遺伝学会第95回大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Exploration of the association between HSFA2 and ONSEN expression2023

    • Author(s)
      Zhiyu Ge, Xiaoying Niu, Hidetaka Ito
    • Organizer
      日本遺伝学会第95回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] DNA methylation mediates transcriptional regulation of heat-active retrotransposons by HDAC2023

    • Author(s)
      SUN XIN, Hidetaka Ito
    • Organizer
      日本遺伝学会第95回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Novel mechanism of transposon repression by histone deacetylases.2023

    • Author(s)
      Ito, H, Niu, X, Ikeda, Y, Saze, H, Kanehira, R, Son, N
    • Organizer
      The 33rd International Conference on Arabidopsis Research
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DDR複合体による熱活性型レトロトランスポゾンの制御機構2022

    • Author(s)
      牛 小蛍、陳 露、加藤 敦之、伊藤 秀臣
    • Organizer
      日本遺伝学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Search for novel transcriptional regulators of heat-activated retrotransposons in Arabidopsis thalian2022

    • Author(s)
      牛 小蛍、竹平 佳菜子、加藤 敦之、伊藤 秀臣
    • Organizer
      日本植物生理学会
    • Related Report
      2022 Research-status Report
  • [Presentation] Investigating a novel regulator of heat-responsive retrotransposons in Arabidopsis thaliana.2022

    • Author(s)
      牛小蛍、竹平佳菜子、加藤敦之、伊藤秀臣
    • Organizer
      日本植物生理学会
    • Related Report
      2021 Research-status Report
  • [Presentation] シロイヌナズナにおける熱活性型レトロトランスポゾンの新規転移制御因子の探索2021

    • Author(s)
      牛小蛍、竹平佳菜子、加藤敦之、伊藤秀臣
    • Organizer
      日本遺伝学会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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