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Control of the Protein secretion system of periodontal bacteria

Research Project

Project/Area Number 19K10091
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 57020:Oral pathobiological science-related
Research InstitutionNagasaki University

Principal Investigator

Sato Keiko  長崎大学, 医歯薬学総合研究科(歯学系), 准教授 (70410579)

Co-Investigator(Kenkyū-buntansha) 佐藤 主税  国立研究開発法人産業技術総合研究所, 生命工学領域, 上級主任研究員 (00357146)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords歯周病細菌 / タンパク質分泌 / 歯周病 / 細菌 / Type IX secretion system / PorM / 分泌タンパク質 / 歯周病菌 / 歯周病原菌 / 病原因子分泌機構
Outline of Research at the Start

代表的な歯周病細菌 Porphyromonas gingivalis の病原タンパク質分泌装置 (Type IX secretion system: T9SS)はバクテロイデスフィラムに属する他の歯周病細菌にも保存される。T9SSからは数十のタンパク質が分泌されるため、T9SS構成分子欠損株では病原性が著しく低下することが報告される。分泌装置を構築する個々の因子について構造・機能解析をおこなうとともに、分泌されるタンパク質がどのような共通性を持ち、分泌機構に認識されて内膜・外膜を通過し、菌体表層にアンカーするのか、T9SSの全貌を明らかにする。また、T9SS制御に向けた基礎研究を行う。

Outline of Final Research Achievements

The type IX secretion system (T9SS) of the periodontopathogenic bacterium Porphyromonas gingivalis is conserved among bacteria belonging to the Bacteroides phylum and is involved in sliding motility in some species. We analyzed the structure and function of PorM, a component of the T9SS secretion apparatus, which consists of four domains: the D1 domain is a monomer, the D2-D4 domains form a dimer, and the D1 and D2 domains are folded between the D1 and D2 domains. We solved the structure of PorM, one of the core structures of T9SS of P. gingivalis by X-ray crystallography.

Academic Significance and Societal Importance of the Research Achievements

歯周病細菌 Porphyromonas gingivalis はタンパク質分泌装置T9SSから、組織障害性プロテアーゼ、凝集素、リウマチに関わるとされるシトルリン化変換酵素等の様々な病原因子を含む、30のタンパク質を分泌する。また、他の主要歯周病関連菌のTannerella forsythiaやPrevotella intermediaのT9SSからは30-50のタンパクが分泌される。このT9SSコア構造の1つであるPorMの構造を明らかにしたことにより、T9SS制御することにより歯周病を制御する薬剤の開発が期待される。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (2 results) (of which Invited: 1 results)

  • [Int'l Joint Research] Oakland University(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Biofilm Spreading by the Adhesin-Dependent Gliding Motility of Flavobacterium johnsoniae: 2. Role of Filamentous Extracellular Network and Cell-to-Cell Connections at the Biofilm Surface2021

    • Author(s)
      Sato Keiko、Naya Masami、Hatano Yuri、Kasahata Naoki、Kondo Yoshio、Sato Mari、Takebe Katsuki、Naito Mariko、Sato Chikara
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 13 Pages: 6911-6911

    • DOI

      10.3390/ijms22136911

    • NAID

      120007168847

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Biofilm Spreading by the Adhesin-Dependent Gliding Motility of Flavobacterium johnsoniae. 1. Internal Structure of the Biofilm2021

    • Author(s)
      Sato Keiko、Naya Masami、Hatano Yuri、Kondo Yoshio、Sato Mari、Nagano Keiji、Chen Shicheng、Naito Mariko、Sato Chikara
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 4 Pages: 1894-1894

    • DOI

      10.3390/ijms22041894

    • NAID

      120006979509

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Colony spreading of the gliding bacterium Flavobacterium johnsoniae in the absence of the motility adhesin SprB2021

    • Author(s)
      Sato Keiko、Naya Masami、Hatano Yuri、Kondo Yoshio、Sato Mari、Narita Yuka、Nagano Keiji、Naito Mariko、Nakayama Koji、Sato Chikara
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 697-697

    • DOI

      10.1038/s41598-020-79762-5

    • NAID

      120006956183

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] PorM, a core component of bacterial type IX secretion system, forms a dimer with a unique kinked-rod shape2020

    • Author(s)
      Sato Keiko、Okada Kodai、Nakayama Koji、Imada Katsumi
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 532 Issue: 1 Pages: 114-119

    • DOI

      10.1016/j.bbrc.2020.08.018

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 歯周病細菌叢の病原性を抑える試み2021

    • Author(s)
      佐藤啓子、納屋昌実、近藤好夫、武部克希、内藤真理子、鈴木守、今田勝巳、石川岳志、佐藤主税,
    • Organizer
      第94回日本細菌学会総会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 冷水病罹患アユからの Flavobacterium 属の分離2020

    • Author(s)
      佐藤啓子、大原健一、藤井亮吏、近藤好夫、中井雄大、林田秀明、和田崇之、内藤麻里子
    • Organizer
      日本ゲノム微生物学会年会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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