• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Understanding the mechanisms by which a replisome component Ctf4 promotes proper repair of DNA double-strand breaks at arrested replication forks

Research Project

Project/Area Number 17K15160
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Genetics/Chromosome dynamics
Research InstitutionThe University of Tokyo

Principal Investigator

Sasaki Mariko  東京大学, 定量生命科学研究所, 助教 (50722013)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
KeywordsDNA複製阻害 / DNA二本鎖切断 / Ctf4 / ゲノム再編成 / ゲノム不安定化 / rDNA / DNA二重鎖切断 / 複製阻害 / 複製フォーク
Outline of Final Research Achievements

In this study, I aimed to understand the molecular mechanisms by which Ctf4 protein promotes proper repair of DNA double-strand breaks (DSBs) formed upon replication inhibition. To this end, I compared the levels of replisome factors and homologous recombination factors bound around DSBs by chromatin immunoprecipitation and identified factors whose association levels are altered in the absence of Ctf4. Furthermore, I identified the Ctf4-interacting protein that may function together with Ctf4 during DSB repair. I will examine in a future study how these factors collaborate together with Ctf4 to regulate DSB repair.

Academic Significance and Societal Importance of the Research Achievements

DNA複製は、遺伝情報を正確に伝達するために必須である。しかし複製装置の進行はゲノム上の様々な障害によって止まる。複製阻害が起きると、最も危険なDNA損傷であるDNA二本鎖切断(DNA double-strand break, DSB)ができやすくなりゲノム不安定化が誘導されるが、その修復機構は不明である。申請者は先行研究から、複製装置の構成因子であるCtf4タンパク質がDSB修復に必要であることを明らかにした。本研究課題ではCtf4タンパク質の作用過程やDSB修復時に必要なパートナー因子を明らかにしたことから、Ctf4タンパク質の作用機構を探る上で重要な成果を得ることができた。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (8 results)

All 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (5 results) (of which Invited: 1 results)

  • [Journal Article] Ctf4 Prevents Genome Rearrangements by Suppressing DNA Double-Strand Break Formation and Its End Resection at Arrested Replication Forks2017

    • Author(s)
      Sasaki Mariko、Kobayashi Takehiko
    • Journal Title

      Molecular Cell

      Volume: 66 Issue: 4 Pages: 533-545

    • DOI

      10.1016/j.molcel.2017.04.020

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] rDNA stability is supported by many "Buffer genes" -Introduction to the Yeast rDNA Stability Database.2017

    • Author(s)
      Kobayashi T, Sasaki M
    • Journal Title

      FEMS Yeast Res.

      Volume: - Issue: 1 Pages: 1-8

    • DOI

      10.1093/femsyr/fox001

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] レプリソームの構成タンパク質であるCtf4は複製が阻害された際に生じるDNA二本鎖切断の修復に重要である2017

    • Author(s)
      佐々木真理子、小林武彦
    • Journal Title

      First Autho's ライフサイエンス新着論文レビュー

      Volume: -

    • Related Report
      2017 Research-status Report
  • [Presentation] DNA複製阻害時のDNA二重鎖切断修復機構の解明2018

    • Author(s)
      佐々木 真理子
    • Organizer
      第41回日本分子生物学会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] A replisome component Ctf4 suppresses end resection of DNA double-strand breaks at arrested replication forks2018

    • Author(s)
      Mariko Sasaki and Takehiko Kobayashi
    • Organizer
      11th 3R + 3C Symposium
    • Related Report
      2018 Annual Research Report
  • [Presentation] DNA複製阻害時のDNA二重鎖切断修復機構の解明2018

    • Author(s)
      佐々木 真理子、小林 武彦
    • Organizer
      日本遺伝学会第90回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] A replisome component Ctf4 suppresses end resection of DNA double-strand breaks at arrested replication forks.2018

    • Author(s)
      Mariko Sasaki and Takehiko Kobayashi
    • Organizer
      Gordon Research Conference Genomic Instability
    • Related Report
      2018 Annual Research Report
  • [Presentation] DNA複製阻害時のDNA複製阻害時の二重鎖切断修復機構の解明2017

    • Author(s)
      佐々木 真理子
    • Organizer
      日本遺伝学会第89回大会
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi