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Association between acquisition of virulence factors and Argonaute protein in bacteria

Research Project

Project/Area Number 19K06494
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionMatsumoto Dental University

Principal Investigator

Miyoshi Tomohiro  松本歯科大学, 歯学部, 講師 (60534550)

Co-Investigator(Kenkyū-buntansha) 石津 大嗣  慶應義塾大学, 医学部(信濃町), 講師 (40574588)
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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordssmall RNA / Argonaute / DNA silencing / 小分子RNA / シンバイオシス / DNA複製阻害 / プラスミド / DNAサイレンシング / ファージ / 病原性
Outline of Research at the Start

Argonauteタンパク質は、真核生物ではRNA干渉やmiRNA経路の中心的な役割を担っているが、原核生物ではその機能が不明である。近年申請者らは、Argonauteが原核細胞において小分子RNAをガイド鎖として、その塩基配列依存的に標的DNAと結合することにより、DNA interferenceを誘導する細菌の新規メカニズムを発見した。本研究では、この新規メカニズムである原核ArgonauteのDNA interference活性による外来性DNA獲得と病原性発現に与える影響を分子レベルで明確にする。この研究成果は、細菌感染症分野の医学・創薬研究にイノベーションを与えると考えられる。

Outline of Final Research Achievements

In this research project, we performed a functional analysis of the prokaryotic Argonaute, which has not been clarified yet. Expression of Argonaute in E. coli caused changes in the infectivity of some bacteriophages. Furthermore, the expression of Argonaute was shown to elongate the cell morphology of E. coli. This result is similar to the result when the DNA amplification reaction was inhibited by a drug, suggesting that Argonaute is involved in the DNA amplification reaction in prokaryotic cells. We have also succeeded in identifying health-contributing bacteria that are essential for investigating the association between Argonaute and indigenous/pathogens.

Academic Significance and Societal Importance of the Research Achievements

現在、世界的に感染性微生物の病原性や薬剤耐性獲得の問題が大きくなりつつある。この微生物の病原性や薬剤耐性獲得は、外来遺伝子の獲得によって行われている。本研究では、外来遺伝子の獲得と Argonauteの機能に着目したものである。本研究成果は、 Argonauteに結合した小分子RNAの機能を調べ、微生物の病原性獲得との関連性を示した研究のため、医学的な観点から学術的及び社会的意義が大きい成果が得られた。

Report

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

    (12 results)

All 2022 2021 2020 2019

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Gemella haemolysans inhibits the growth of the periodontal pathogen Porphyromonas gingivalis.2021

    • Author(s)
      Miyoshi T, Oge S, Nakata S, Ueno Y, Ukita H, Kousaka R, Miura Y, Yoshinari N, Yoshida A.
    • Journal Title

      Scientific reports

      Volume: 11(1) Issue: 8 Pages: 11742-11742

    • DOI

      10.1111/pin.13110

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural insights into the switching off of the interaction between the archaeal ribosomal stalk and aEF1A by nucleotide exchange factor aEF1B.2021

    • Author(s)
      Suzuki,T., Ito, K., Miyoshi, T., Murakami, R., Uchiumi, T.
    • Journal Title

      J. Mol. Biol.

      Volume: - Issue: 15 Pages: 167046-167046

    • DOI

      10.1016/j.jmb.2021.167046

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural insights into the switching off of the interaction between the archaeal ribosomal stalk and aEF1A by nucleotide exchange factor aEF1B2021

    • Author(s)
      Takahiro Suzuki, Kosuke Ito, Tomohiro Miyoshi, Ryo Murakami, and Toshio Uchiumi
    • Journal Title

      Journal of Molecular Biology

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Aggregatibacter actinomycetemcomitans induces detachment and death of human gingival epithelial cells and fibroblasts via elastase release following leukotoxin‐dependent neutrophil lysis2019

    • Author(s)
      Hiyoshi Takumi、Domon Hisanori、Maekawa Tomoki、Nagai Kosuke、Tamura Hikaru、Takahashi Naoki、Yonezawa Daisuke、Miyoshi Tomohiro、Yoshida Akihiro、Tabeta Koichi、Terao Yutaka
    • Journal Title

      Microbiology and Immunology

      Volume: 63 Issue: 3-4 Pages: 100-110

    • DOI

      10.1111/1348-0421.12672

    • NAID

      40021899825

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] The growth inhibitory effect of pathogenic bacteria by Serratia marcescens2022

    • Author(s)
      Tomohiro Miyoshi, Chisato Ohori, Yu Muto, Atsushi Ishihara, Kumiko Osaki-Oka, Akihiro Yoshida
    • Organizer
      第95回日本細菌学会総会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 歯周病原菌と競合する微生物-その探索と発見2021

    • Author(s)
      大堀 千郷, 三好 智博, 吉田 明弘
    • Organizer
      第91回松本歯科大学学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Gemella haemolysans specifically inhibits the growth of Porphyromonas gingivalis2020

    • Author(s)
      Tomohiro Miyoshi, Nobuo Yoshinari and Akihiro Yoshida
    • Organizer
      International Association for Dental Research
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Porphyromonas gingivalisの生育を特異的に阻害するGemella haemolysans2020

    • Author(s)
      三好智博、吉成伸夫、吉田明弘
    • Organizer
      第62回歯科基礎医学会学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] リボソームストークタンパク質の構造・機能研究2020

    • Author(s)
      伊東孝祐、丸山圭 今井大達 三好智博 内海利男
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2020 Research-status Report
  • [Presentation] Hemolytic Gemella is Associated with Suppression of Periodontal Disease2019

    • Author(s)
      Tomohiro Miyoshi, Satoshi Nakata, Shogo Oge, Yuji Ueno, Hidehiko Ukita, Reiko Kousaka, Nobuo Yoshinari, Akihiro Yoshida
    • Organizer
      第92回日本細菌学会総会
    • Related Report
      2019 Research-status Report
  • [Presentation] Gemellaの口腔内における役割2019

    • Author(s)
      三好智博、中田智是、大毛将吾、植野裕司、浮田英彦、高坂怜子、吉成伸夫、吉田明弘
    • Organizer
      第51回レンサ球菌研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 口腔内における溶血性Gemellaと歯周病細菌P. gingivalisの関連性2019

    • Author(s)
      三好智博、吉成伸夫、吉田明弘
    • Organizer
      第61回歯科基礎医学会学術大会
    • Related Report
      2019 Research-status Report

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

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