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

Mismatch repair system in prokaryotes lacking canonical mutS-dependent system

Research Project

Project/Area Number 18K06190
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43050:Genome biology-related
Research InstitutionNational Center for Global Health and Medicine

Principal Investigator

Takemoto Norihiko  国立研究開発法人国立国際医療研究センター, その他部局等, 上級研究員 (40546793)

Co-Investigator(Kenkyū-buntansha) 末次 正幸  立教大学, 理学部, 教授 (00363341)
福井 健二  大阪医科大学, 医学部, 助教 (00466038)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2019: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
KeywordsMismatch修復 / DNA複製エラー / 突然変異 / ミスマッチ修復 / DNA修復 / 放線菌 / 複製エラー
Outline of Final Research Achievements

MutS-dependent mismatch repair system have been known to be conserved from bacteria to human, as a replication error correction system. Disruption of MMR system results in increased mutation rate, leading to high occurrence of cancer cells or drug-resistant pathogens. However, recent advances in Next Generation Sequencing technologies shed light on the existence of exceptions, in which mutation rate is not so high regardless of the lack of canonical MMR system. In this study, we searched for conserved gene which works to decrease mutations in prokaryotes lacking canonical MMR system. We found that EndoMS works for replication error correction.

Academic Significance and Societal Importance of the Research Achievements

DNA複製や修復は生物全般に極めて重要で共通する現象であるが、分子基盤についてはモデル生物といわれる一部の生物での解析が先行している。これらの現象やその分子基盤が生物にとってどれほど重要なものなのかについて明らかにするには、その分子基盤を持たない生物が存在するのか?存在するのであればそのような生物においてどのように欠損を補っているのか?について理解する必要がある。本研究では、DNA複製の正確性担保に必要と考えられていた従来型の機構を持たない、ごく少数の生物群において新たな機構を見出した。分子基盤は違えど複製エラーを修復する機構が普遍的に備わっていることを示し、その重要性が明らかとなった。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2019 2018

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

  • [Journal Article] Bacterial EndoMS/NucS acts as a clamp-mediated mismatch endonuclease to prevent asymmetric accumulation of replication errors2018

    • Author(s)
      Takemoto Norihiko、Numata Itaru、Su’etsugu Masayuki、Miyoshi-Akiyama Tohru
    • Journal Title

      Nucleic Acids Research

      Volume: 46 Issue: 12 Pages: 6152-6165

    • DOI

      10.1093/nar/gky481

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 竹本 訓彦, 沼田 格, 末次 正幸, 秋山 徹2019

    • Author(s)
      MutS非依存型新規ミスマッチ修復機構の解析
    • Organizer
      日本農芸化学会 2019年度大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Bacterial EndoMS/NucS acts as a clamp-mediated mismatch endonuclease to prevent asymmetric accumulation of replication errors2019

    • Author(s)
      竹本 訓彦,沼田 格,末次 正幸,堀野 芽生,渡邊 真弥,秋山 徹
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Bacterial EndoMS/NucS acts as a clamp-mediated mismatch endonuclease to prevent asymmetric accumulation of replication errors2018

    • Author(s)
      Norihiko Takemoto, Itaru Numata, Masayuki Su'etsugu, Tohru Miyoshi-Akiyama
    • Organizer
      International 3R&3C Symposium
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi