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Genetic dissection of VANC21-mediated anti-silencing mechanism

Research Project

Project/Area Number 18K06348
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45010:Genetics-related
Research InstitutionThe University of Tokyo

Principal Investigator

SASAKI Taku  東京大学, 大学院理学系研究科(理学部), 特任助教 (80744870)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsトランスポゾン / DNAメチル化 / 脱抑制機構 / 脱抑制 / エピジェネティクス / 遺伝学
Outline of Final Research Achievements

VANDAL21 is unique transposable elements (TEs) which have anti-silencing system. Anti-silencing factor VANC21, which is encoded within VANDAL21, binds to noncoding regions of VANDAL21, and induces DNA demethylation and transcriptional activation. This sequence-specific anti-silencing system would contribute to the proliferation of VANDAL21 with minimizing damage to the host epigenome. However, the underlying molecular mechanism is elusive.
I carried out forward genetic screening of factors involved in VANC21-mediated anti-silencing system, and obtained some candidates of mutants. In addition, I also analyzed the evolution of VANC-mediated anti-silencing system and the molecular basis of the epigenetic conflict between host and TEs.

Academic Significance and Societal Importance of the Research Achievements

トランスポゾンは転移酵素以外にもさまざまな遺伝子をコードしているが、それらの機能のほとんどはわかっていない。VANDALが持つ脱抑制因子VANCは、配列特異的なDNA脱メチル化とトランスポゾンの活性化を促す因子で、トランスポゾンの進化の観点からもエピジェネティック制御因子としての観点からも興味深い。本研究が示した脱抑制機構の進化およびホストとの拮抗的制御関係、ゲノム進化に脱抑制という新しい視点をもたらしたと考えられる。また、スクリーニングにより脱抑制機構に関わる候補が多数得られており、その機能解明は新規エピジェネティック制御機構の発見にも繋がるものと期待される。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2019 2018 Other

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

  • [Int'l Joint Research] CNRS(フランス)

    • Related Report
      2021 Research-status Report
  • [Journal Article] The arms race in noncoding regions of transposable element: the evolution of anti-silencing and RNAi2022

    • Author(s)
      Taku Sasaki, Kae Kato, Hosaka, Yu Fu, Atsushi Toyoda, Asao Fujiyama, Yoshiaki Tarutani, Tetsuji Kakutani
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2022.12.19.521048

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Fast co‐evolution of anti‐silencing systems shapes the invasiveness of <i>Mu</i> ‐like DNA transposons in eudicots2022

    • Author(s)
      Sasaki Taku、Ro Kyudo、Caillieux Erwann、Manabe Riku、Bohl‐Viallefond Gr?goire、Baduel Pierre、Colot Vincent、Kakutani Tetsuji、Quadrana Leandro
    • Journal Title

      The EMBO Journal

      Volume: 41 Issue: 8

    • DOI

      10.15252/embj.2021110070

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] VANDALトランスポゾンの脱抑制機構の進化2022

    • Author(s)
      佐々木卓、盧逵都、真鍋陸、角谷徹仁
    • Organizer
      第94回日本遺伝学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Fighting back epigenetic silencing: The discovery and character of multiple transposon-encoded anti-silencing systems in Arabidopsis thaliana.2021

    • Author(s)
      Sasaki T, Ro K, Manabe R, Caillieux E, Bohl G, Kramdi A, Benchouaia M, Colot V, Kakutani T, Quadrana L
    • Organizer
      EMBO workshop
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 植物のエピジェネティクス -その基礎と園芸植物への応用の可能性-2019

    • Author(s)
      佐々木卓
    • Organizer
      園芸学会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] シロイヌナズナのトランスポゾンVANDAL21の活性制御におけるRNAiと抗抑制因子の拮抗的制御2018

    • Author(s)
      佐々木卓、加藤夏絵、樽谷芳明、角谷徹仁
    • Organizer
      第90回日本遺伝学会
    • Related Report
      2018 Research-status Report
  • [Presentation] VANDAL21の活性制御と進化的軍拡競争2018

    • Author(s)
      佐々木卓
    • Organizer
      2018年度遺伝研研究会「転移因子と宿主の相互作用による生命機能と進化」
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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