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Transaction of RNA transcription to DNA replication

Research Project

Project/Area Number 21K19203
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 43:Biology at molecular to cellular levels, and related fields
Research InstitutionJapanese Foundation for Cancer Research (2022-2023)
Tohoku University (2021)

Principal Investigator

DAIGAKU Yasukazu  公益財団法人がん研究会, がん研究所 がんゲノム動態プロジェクト, プロジェクトリーダー (80619875)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2022: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2021: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
KeywordsDNA複製 / 転写・複製コンフリクト / ゲノム安定性 / DNAポリメラーゼ / 転写 / 複製開始点 / 染色体編成
Outline of Research at the Start

DNA複製の際も遺伝子発現は常に起きているため,ゲノムDNAの複製を円滑に行う上で,RNA転写との調和は重要である.特に,RNAポリメラーゼはDNA複製装置と干渉し合う関係にあり,その影響は染色体異常の原因になることが報告されている.本研究では,特定のDNAポリメラーゼ合成を全ゲノムに渡ってプロファイリングする実験系:Polymerase usage sequencing (Pu-seq)を用い,転写によるゲノム複製への影響を検証する.さらに,その知見をもとに,人工的な転写制御を介して,外部から導入したDNAの複製をコントロールすることを目指す.

Outline of Final Research Achievements

Using genomic datasets of DNA polymerase responsible for leading and lagging strand DNA synthesis, this study generated a genomic profile that quantitatively monitors the dynamics of replication forks (initiation, termination, and progression). Utilising this profile, we extracted regions where replication fork dynamics show characteristic changes and consequently demonstrated that replication initiation regions are located in the vicinity of actively transcribed genes and that fork termination occurs within gene bodies. This suggests a trend of replication fork progression from the periphery of genes towards their interiors. Additionally, as this tendency becomes more pronounced in large genes, our analysis suggests that the impact of collisions between replication forks and gene transcription is likely to be more significant around large genes.

Academic Significance and Societal Importance of the Research Achievements

DNA複製と転写は同じゲノム上で同時に機能する必要があるが、これら機能がお互いにどのように調和し、また、干渉し合っているかを具体的示す研究は発展途上である。その状況で、本研究は、複製開始領域が遺伝子の転写領域を避けるように配置され、また、遺伝子転写領域において複製フォークがどのように進行するかを明らかにすることができた。結果として、本研究は、転写・複製コンフリクトによって引き起こされるゲノム不安定性を議論する上で重要な成果をあげることができた。

Report

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

    (11 results)

All 2024 2023 2022 2021

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results)

  • [Journal Article] Adaptive use of error‐prone DNA polymerases provides flexibility in genome replication during tumorigenesis2024

    • Author(s)
      Bainbridge Lewis J.、Daigaku Yasukazu
    • Journal Title

      Cancer Science

      Volume: - Issue: 7 Pages: 2125-2137

    • DOI

      10.1111/cas.16188

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Global landscape of replicative DNA polymerase usage in the human genome2022

    • Author(s)
      Koyanagi Eri、Kakimoto Yoko、Minamisawa Tamiko、Yoshifuji Fumiya、Natsume Toyoaki、Higashitani Atsushi、Ogi Tomoo、Carr Antony M.、Kanemaki Masato T.、Daigaku Yasukazu
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 7221-7221

    • DOI

      10.1038/s41467-022-34929-8

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Global landscape of replicative DNA polymerase usage in the human genome2021

    • Author(s)
      Koyanagi Eri、Kakimoto Yoko、Yoshifuji Fumiya、Natsume Toyoaki、Higashitani Atsushi、Ogi Tomoo、Carr Antony M.、Kanemaki Masato T.、Daigaku Yasukazu
    • Journal Title

      BioRxiv

      Volume: - Pages: 1-41

    • DOI

      10.1101/2021.11.14.468503

    • Related Report
      2021 Research-status Report
    • Open Access / Int'l Joint Research
  • [Presentation] Variation in usage of leading and lagging polymerases in the human genome and its relation to the transcriptional landscape2023

    • Author(s)
      Yasukazu Daigaku
    • Organizer
      CSHL meeting - Eukaryotic DNA Replication & Genome Maintenance
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Chromosome fragility and DNA polymerase usage2023

    • Author(s)
      Yasukazu Daigaku
    • Organizer
      8th Meeting of the Asian Forum for Chromosome & Chromatin Biology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 細胞内・核内環境と連動するゲノム複製機構2023

    • Author(s)
      大学保一, 小柳恵理, 柿本洋子, 南澤宝美后, 夏目豊彰, 鐘巻将人
    • Organizer
      第96回日本生化学会大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Global usage of replicative polymerases and its relation with transcription in human cells U2023

    • Author(s)
      Yasukazu Daigaku
    • Organizer
      UK-Japan Genome Stability Symposium
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] DNA polymerase dynamics and genomic instability2022

    • Author(s)
      大学保一, 鐘巻将人
    • Organizer
      第81回日本癌学会学術総会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 核内環境に応じた複製フォーク動態の多様性2021

    • Author(s)
      小柳恵理, 柿本洋子, 大学保一
    • Organizer
      日本遺伝学会第92回大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 遺伝子転写のDNAポリメラーゼ動態への影響2021

    • Author(s)
      小柳恵理, 柿本洋子, 荻朋男, 夏目豊彰, 鐘巻将人, 大学保一
    • Organizer
      第26回DNA複製・組換え・修復ワークショップ
    • Related Report
      2021 Research-status Report
  • [Presentation] DNAポリメラーゼ動態から見る,転写機構の染色体複製への影響2021

    • Author(s)
      小柳恵理, 柿本洋子, 荻朋男, 夏目豊彰, 鐘巻将人, 大学保一
    • Organizer
      第39回染色体ワークショップ・第20回核ダイナミクス研究会
    • Related Report
      2021 Research-status Report

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

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