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Formation model of Bacteroidia bacteria pilus-X-ray crystal structure analysis and molecular reconstruction experiment-

Research Project

Project/Area Number 16H05504
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Morphological basic dentistry
Research InstitutionNagasaki University

Principal Investigator

NAKAYAMA Koji  長崎大学, 医歯薬学総合研究科(歯学系), 客員研究員 (80150473)

Co-Investigator(Kenkyū-buntansha) 今田 勝巳  大阪大学, 理学研究科, 教授 (40346143)
内藤 真理子  長崎大学, 医歯薬学総合研究科(歯学系), 准教授 (20244072)
庄子 幹郎  長崎大学, 医歯薬学総合研究科(歯学系), 助教 (10336175)
Research Collaborator SHIBATA Satoshi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2018: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2016: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords線毛 / 付着 / 細菌 / 歯周病 / 歯周病関連細菌 / 蛋白質 / 感染症 / 感染
Outline of Final Research Achievements

Porphyromonas gingivalis is the most important pathogen of chronic periodontitis. This bacterum has pilus involved in adhesion to the periodontal area. There are two types of pili: Fim pili and Mfa pili. Previous studies have shown that the proteins that make up both pili are transported to the cell surface by the lipoprotein transport system. In this study, it was clarified that the polymerization mode of these constituent proteins was polymerized by donor exchange reaction with C-terminal as donor chain using X-ray crystal structure analysis, cryo-electron microscopic analysis, etc. This pilus formation mechanism is named 5 type pilus because it is completely different from what has been reported as the pilus formation mechanism so far.

Academic Significance and Societal Importance of the Research Achievements

日本では歯周病は40歳以上の成人の半数以上が罹患している慢性感染症であり、その原因は口腔内の細菌である。そのなかでもPorphyromonas gingivalisは最重要原因細菌であり、本菌の歯周病原性の理解は歯周病の治療あるいは予防のうえで重要と考えられる。本研究では本菌のもつ病原因子のなかで歯周局所への付着に関与する線毛についてその形成機構を詳細に解析した結果、いままで線毛形成機構として報告されたものとは全く異なる機構であることがわかった。この研究成果は今後、線毛の形成阻害をおこす方法、引いては本菌の歯周病原性を武装解除する方法を開発するうえで重要な知見を与えた。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (15 results)

All 2019 2018 2017 2016

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 1 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] PGN_0297 is an essential component of the type IX secretion system (T9SS) in Porphyromonas gingivalis: Tn-seq analysis for exhaustive identification of T9SS-related genes.2019

    • Author(s)
      Naito M, Tominaga T, Shoji M, Nakayama K.
    • Journal Title

      Microbiol Immunol.

      Volume: 63(1) Issue: 1 Pages: 11-20

    • DOI

      10.1111/1348-0421.12665

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Involvement of PorK, a component of the type IX secretion system, in Prevotella melaninogenica pathogenicity.2018

    • Author(s)
      Kondo Y, Sato K, Nagano K, Nishiguchi M, Hoshino T, Fujiwara T, Nakayama K.
    • Journal Title

      Microbiol Immunol.

      Volume: 62(9) Issue: 9 Pages: 554-566

    • DOI

      10.1111/1348-0421.12638

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Immunoglobulin-like domains of the cargo proteins are essential for protein stability during secretion by the type IX secretion system.2018

    • Author(s)
      Sato K, Kakuda S, Yukitake H, Kondo Y, Shoji M, Takebe K, Narita Y, Naito M, Nakane D, Abiko Y, Hiratsuka K, Suzuki M, Nakayama K.
    • Journal Title

      Mol Microbiol.

      Volume: 110(1) Issue: 1 Pages: 64-81

    • DOI

      10.1111/mmi.14083

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Porphyromonas gingivalis triggers NLRP3-mediated inflammasome activation of macrophages in a bacterial gingipains-independent manner.2018

    • Author(s)
      Tokuju Okano, Hiroshi Ashida, Shiho Suzuki, Mikio Shoji, Koji Nakayama, Toshihiko Suzuki,
    • Journal Title

      Eur. J. Immunol.

      Volume: 48 Issue: 12 Pages: 1965-1974

    • DOI

      10.1002/eji.201847658

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Distinct Type of Pilus from the Human Microbiome.2016

    • Author(s)
      Xu Q, Shoji M, Shibata S, Naito M, Sato K, Elsliger MA, Grant JC, Axelrod HL, Chiu HJ, Farr CL, Jaroszewski L, Knuth MW, Deacon AM, Godzik A, Lesley SA, Curtis MA, Nakayama K, Wilson IA
    • Journal Title

      Cell

      Volume: 165 Issue: 3 Pages: 690-703

    • DOI

      10.1016/j.cell.2016.03.016

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Porphyromonas gingivalis gingipains による炎症抑制機構2018

    • Author(s)
      岡野徳壽,庄子幹郎,中山浩次,鈴木敏彦
    • Organizer
      第60回歯科基礎医学会学術大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Porphyromonas gingivalis gingipainsによるMEK/ERK/AP-1およびIKK/NF-kBp65の活性化を介したCOX-2発現およびPGE2産生の誘導機構2018

    • Author(s)
      中山真彰,内藤真理子,橘理人,中山浩次,大原直也
    • Organizer
      第60回歯科基礎医学会学術大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 細菌9型分泌装置のコア構成蛋白質PorMの構造2018

    • Author(s)
      佐藤啓子,岡田広大,中根大介,中山浩次,今田勝己
    • Organizer
      第91回日本生化学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Structure of PorM, a core component of bacterial type IX secretion system2018

    • Author(s)
      佐藤啓子,岡田広大,中根大介,中山浩次,今田勝己
    • Organizer
      第56回日本生物物理学会年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Porphyromonas gingivalisの線毛蛋白質FimAの構造2018

    • Author(s)
      岡田広大,庄子幹郎,中山浩次,今田勝巳
    • Organizer
      第23回べん毛研究交流会
    • Related Report
      2017 Annual Research Report
  • [Presentation] V 型線毛のクライ電子顕微鏡を用いた構造解析2018

    • Author(s)
      柴田 敏史, 庄子 幹郎, 中山 浩次, Matthias Wolf
    • Organizer
      第91回日本細菌学会総会
    • Related Report
      2017 Annual Research Report
  • [Presentation] バクテロイデーテス門細菌のIX型分泌機構およびV型線毛の研究2017

    • Author(s)
      中山浩次
    • Organizer
      第90回日本細菌学会
    • Place of Presentation
      仙台国際センター(宮城県・仙台市)
    • Year and Date
      2017-03-19
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Structure of FimA, a major component protein of fimbriae of Porphyromonas gingivitis2017

    • Author(s)
      Okada K, Nakayama K, Shoji M, Imada K
    • Organizer
      日本生物物理学会第55回年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] The type IX secretion, gliding motility and the type V pilus2016

    • Author(s)
      Nakayama K
    • Organizer
      Protein Secretion in Bacteria Conference
    • Place of Presentation
      シラタ・ビーチ・リゾート・ホテル(米国)
    • Year and Date
      2016-11-09
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Patent(Industrial Property Rights)] メンブレンヴェシクル2019

    • Inventor(s)
      中尾龍馬, 庄子幹郎, 中山浩次
    • Industrial Property Rights Holder
      中尾龍馬, 庄子幹郎, 中山浩次
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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