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

Characterization of a novel TA system regulating DNA topology Staphylococcus aureus

Research Project

Project/Area Number 16K08776
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Bacteriology (including mycology)
Research InstitutionHiroshima University

Principal Investigator

Kato Fuminori  広島大学, 医系科学研究科(歯), 助教 (70452589)

Project Period (FY) 2016-10-21 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords黄色ブドウ球菌 / トキシン・アンチトキシンシステム / DNAジャイレース / 細胞死 / DNAトポロジー / DNA gyrase inhibitor / Toxin-antitoxin system / Staphylococcus aureus / TAシステム / 細菌 / 遺伝子 / 生理活性 / 発現制御 / 感染症
Outline of Final Research Achievements

Toxin-antitoxin (TA) system is widely conserved in bacteria, and is involved in processes such as stress response, pathogenicity, and the formation of persister cells in the presence of antibiotics. In this study, we characterized the newly identified TA system in Staphylococcus aureus and demonstrated the following. (1) New toxin inhibited an essential DNA topoisomerase, DNA gyrase. (2) the 27th Glu and 37th Asp residues are important for the toxicity. (3) The toxin forms alpha-helix structure. These findings give new insights into the TA system in S. aureus, but also the development of antibacterial drugs.

Academic Significance and Societal Importance of the Research Achievements

本研究は、アミノ酸配列相同検索からは、機能を推測できない黄色ブドウ球菌の機能未解明なタンパク質の活性を生化学的に詳細に解析することで、黄色ブドウ球菌の新規なTAシステムであることを明らかにした。現在においても、ゲノム配列は解読されているが、機能未知な遺伝子は多数存在しており、それら遺伝子の機能解明に繋がることが期待される。さらに新規に見出したトキシンは真核生物には存在しない必須遺伝子であるDNAジャイレースを標的とする事から、黄色ブドウ球菌のみならず細菌感染症治療のための新規な抗菌薬開発の基盤情報を提供するものである。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report

Research Products

(17 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (4 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Int'l Joint Research] ラトガース大学(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] ラトガース大学(米国)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] ラトガース大学(米国)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Rutgers University(米国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Genome-wide screening for identification of novel toxin-antitoxin systems in Staphylococcus aureus2019

    • Author(s)
      Fuminori Kato, Satoshi Yoshizumi, Yoshihiro Yamaguchi, Masayori Inouye
    • Journal Title

      Applied and Environmental Microbiology

      Volume: 85

    • DOI

      10.1128/aem.00915-19

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Deletion of mazF increases Staphylococcus aureus biofilm formation in an ica-dependent manner2017

    • Author(s)
      Kato Fuminori、Yabuno Yusuke、Yamaguchi Yoshihiro、Sugai Motoyuki、Inouye Masayori
    • Journal Title

      Pathogens and Disease

      Volume: 75 Pages: 1-14

    • DOI

      10.1093/femspd/ftx026

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] ゲノム上に存在する黄色ブドウ球菌新規Toxin-Antitoxin systemの探索2020

    • Author(s)
      加藤 文紀、山口 良弘、Masayori Inouye
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] DNA Gyraseを阻害する黄色ブドウ球菌TAシステムの機能解析2019

    • Author(s)
      加藤文紀
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Characterization of Staphylococcus aureus toxin-antitoxin system targeting DNA gyrase2019

    • Author(s)
      加藤文紀 Masayori Inouye
    • Organizer
      第52回広島大学歯学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Secondary structure analysis of DNA gyrase inhibitor derived from Staphylococcus aureus by Vacuum-ultraviolet circular-dichroism spectroscopy2019

    • Author(s)
      Fuminori Kato, Koichi Matsuo
    • Organizer
      The 23rd Hiroshima International Symposium on Synchrotron Radiation
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 黄色ブドウ球菌新規Toxin-AntitoxinシステムのToxinはDNA gyraseを阻害する2018

    • Author(s)
      加藤文紀
    • Organizer
      第41回日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 黄色ブドウ球菌新規Toxin-antitoxinシステムの機能解析2018

    • Author(s)
      加藤文紀、山口良弘、井上正順
    • Organizer
      第71回日本細菌学会中国・四国支部総会
    • Related Report
      2018 Research-status Report
  • [Presentation] 黄色ブドウ球菌の新規Type II Toxin-Antitoxinシステムの探索2018

    • Author(s)
      加藤文紀 吉住敏 山口良弘 井上正順
    • Organizer
      第91回日本細菌学会総会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 新規黄色ブドウ球菌トキシン・アンチトキシンシステムの解析2018

    • Author(s)
      加藤 文紀 井上正順
    • Organizer
      第12回日本ゲノム微生物学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 黄色ブドウ球菌新規トキシン・アンチトキシンシステムの探索2017

    • Author(s)
      加藤 文紀 Masayori Inouye
    • Organizer
      第11回日本ゲノム微生物学会年会
    • Place of Presentation
      慶應義塾大学湘南藤沢キャンパス
    • Year and Date
      2017-03-02
    • Related Report
      2016 Research-status Report
  • [Presentation] A search for novel Toxin-antitoxin systems in Staphylococcus aureus2017

    • Author(s)
      Fuminori Kato, Masayori Inouye
    • Organizer
      International Union of Microbiological Societies, Singapore
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 黄色ブドウ球菌タイプIIトキシン・アンチトキシンシステムの探索2017

    • Author(s)
      加藤 文紀 山口良弘 井上正順
    • Organizer
      第40回日本分子生物学会年会(ConBio2017)
    • Related Report
      2017 Research-status Report

URL: 

Published: 2016-10-24   Modified: 2022-02-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi