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逆転写酵素遺伝子を含むレトロンによる病原性発現調節とゲノム多様性との関係

Research Project

Project/Area Number 20018019
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionHiroshima University

Principal Investigator

島本 整  Hiroshima University, 大学院・生物圏科学研究科, 教授 (90187443)

Project Period (FY) 2008 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥8,400,000 (Direct Cost: ¥8,400,000)
Fiscal Year 2009: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2008: ¥4,200,000 (Direct Cost: ¥4,200,000)
Keywords逆転写酵素 / レトロン / コレラ菌 / Vibrio mimicus / 病原性 / 可動性遺伝因子 / マイクロアレイ
Research Abstract

(1) 種々の病原細菌からのレトロンの単離・同定
Vibrio cholerae non-O1, non-O139株であるN-11a株およびコレラ菌の類縁菌であるV.mimicus CS18株より新たなレトロンを単離し,解析を行った。V.cholerae N-11a株のレトロン-Vc154とV.mimicus CS30株のレトロン-Vm129由来のmsDNA-Vc154とmsDNA-Vm129は,いずれもDNA部分に複数のステム・ループ構造を持つ新たなタイプのmsDNAであった。これらのmsDNAは,病原性など細菌の生体調節機構に関与するアプタマーなどの機能を有していると推測された。
(2) コレラ菌におけるレトロンとゲノム多様性との関係
V. cholerae non-O1, non-O139株であるN-1b株は,O1, O139株が保有するレトロン-Vc95とは異なるレトロン-Vc81を保有していた。ゲノム上での挿入部位を調べたところ,レトロン-Vc81はレトロン-Vc95とまったく同じ部位に置換して挿入されていることが明らかになった。さらに,データベースにゲノム配列が登録されているV.cholerae V52株にも同じ領域に別のレトロン-Vc137が存在していることを発見した。以上の結果よりV.choleraeのレトロン挿入部位はゲノムの多様性をもたらしていると考えられた。
(3) 薬剤耐性菌における薬剤耐性遺伝子を含む可動性遺伝因子の解析
エジプトの家畜由来の細菌,魚の養殖場の環境由来菌,パレスチナの入院患者由来の臨床株,アフリカからの輸入動物由来株など数多くの薬剤耐性菌を解析し,新たな薬剤耐性遺伝子を含む種々の耐性遺伝子を検出し,解析した。それらの遺伝子の多くがインテグロンなどの可動性遺伝因子に含まれていた。

Report

(2 results)
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (20 results)

All 2010 2009 2008 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (13 results)

  • [Journal Article] Molecular analysis of antimicrobial resistance in Gram-negative bacteria isolated from fish farms in Egypt2010

    • Author(s)
      Yojiro Ishida
    • Journal Title

      Journal of Veterinary Medical Science 72

      Pages: 727-734

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Genetic basis of multidrug resistance in Salmonella enterica serovars Enteritidis and Typhimurium isolated from diarrheic calves in Egypt2009

    • Author(s)
      Ashraf M.Ahmed
    • Journal Title

      Acta Tropica 111

      Pages: 144-149

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Isolation and molecular characterization of multidrug-resistant strains of Escherichia coli and Salmonella from retail chicken meat in Japan2009

    • Author(s)
      Ashraf M.Ahmed
    • Journal Title

      Journal of Food Science 74

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Characterization of integrons and antimicrobial resistance genes in clinical isolates of Gram-negative bacteria from Palestinian hospitals2009

    • Author(s)
      Amjad I.A.Hussein
    • Journal Title

      Microbiology and Immunology 53

      Pages: 595-602

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Isolation and molecular characterization of multidrug-resistant Gram-negative bacteria from imported flamingos in Japan2009

    • Author(s)
      Maiko Sato
    • Journal Title

      Acta Veterinaria Scandinavica 51

      Pages: 46-46

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Genetic analysis of antimicrobial resistance in Escherichia coli isolated from diarrheic neonatal calves

    • Author(s)
      Ashraf M. Ahmed
    • Journal Title

      Veterinary Microbiology (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Prevalence and molecular characterization of ampicillin resistant Enterobacteriaceae isolated from traditional Egyptian Domiati cheese

    • Author(s)
      Ahmed M. Hammad
    • Journal Title

      Journal of Food Protection (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] レトロンによるコレラ菌の病原性発現制御機構の解析2009

    • Author(s)
      島本整
    • Organizer
      第43回腸炎ビブリオシンポジウム
    • Place of Presentation
      岡山市
    • Year and Date
      2009-11-26
    • Related Report
      2009 Annual Research Report
  • [Presentation] ビブリオ属細菌における新規逆転写酵素とレトロンの解析2009

    • Author(s)
      川端美帆
    • Organizer
      第62回日本細菌学会中国・四国支部総会
    • Place of Presentation
      広島市
    • Year and Date
      2009-10-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] Diversity of novel retron elements and common insertion sites in Vibrio cholerae2009

    • Author(s)
      Tadashi Shimamoto
    • Organizer
      44th Annual Joint Panel Meeting on Cholera & Other Bacterial Enteric Infections
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2009-10-12
    • Related Report
      2009 Annual Research Report
  • [Presentation] Characterization of a novel β-lactamase, SHV-111, from cheese isolate of Klebsiella pneumoniae in Egypt2009

    • Author(s)
      Ahmed M.Hammad
    • Organizer
      49th Interscience Conference on Antimicrobial Agents and Chemotherapy
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2009-09-14
    • Related Report
      2009 Annual Research Report
  • [Presentation] レトロンの機能解析とコレラ菌の病原性発現調節機構との関係2009

    • Author(s)
      神本真紀
    • Organizer
      第21回微生物シンポジウム
    • Place of Presentation
      福山市
    • Year and Date
      2009-09-03
    • Related Report
      2009 Annual Research Report
  • [Presentation] Antibiotic resistance of the Japanese probiotic bacteria2009

    • Author(s)
      Ahmed M.Hammad
    • Organizer
      26th International Congress of Chemotherapy and Infection
    • Place of Presentation
      Toronto, Canada
    • Year and Date
      2009-06-19
    • Related Report
      2009 Annual Research Report
  • [Presentation] コレラ菌レトロンの病原性発現ネットワークヘの影響2009

    • Author(s)
      神本真紀
    • Organizer
      第82回日本細菌学会総会
    • Place of Presentation
      名古屋市
    • Year and Date
      2009-03-12
    • Related Report
      2008 Annual Research Report
  • [Presentation] Prevalence and molecular characterization of ampicillin resistant Enterobacteriaceae isolated from traditional Eavutian Domiati cheese2008

    • Author(s)
      Ahmed M. Hammad
    • Organizer
      11th Western Pacific Congress on Chemotherapy and Infectious Diseases
    • Place of Presentation
      Taipei, Taiwan
    • Year and Date
      2008-12-01
    • Related Report
      2008 Annual Research Report
  • [Presentation] Association of a novel retron with a mobile genetic element integrated into the dihydrouridine synthase gene of Vibrio mimicus2008

    • Author(s)
      Tadashi Shimamoto
    • Organizer
      43 rd U. S.-Japan Joint Panel Meeting on Cholera and Other Bacterial Enteric Infections
    • Place of Presentation
      福岡市
    • Year and Date
      2008-11-18
    • Related Report
      2008 Annual Research Report
  • [Presentation] コレラ菌における逆転写酵素遺伝子を含むレトロンの機能解析2008

    • Author(s)
      島本整
    • Organizer
      第42回腸炎ビブリオシンポジウム
    • Place of Presentation
      富山市
    • Year and Date
      2008-10-24
    • Related Report
      2008 Annual Research Report
  • [Presentation] マイクロアレイを用いたコレラ菌レトロンの機能解析2008

    • Author(s)
      神本真紀
    • Organizer
      第61回日本細菌学会中国・四国支部総会
    • Place of Presentation
      松山市
    • Year and Date
      2008-10-19
    • Related Report
      2008 Annual Research Report
  • [Presentation] Association of retrons with novel mobile genetic elements of Vibrio parahaemolyticus and Vibrio mimicus2008

    • Author(s)
      Tadashi Shimamoto
    • Organizer
      The 9th Korea-Japan International Symposium on Microbiology
    • Place of Presentation
      Seoul, Korea
    • Year and Date
      2008-10-17
    • Related Report
      2008 Annual Research Report
  • [Presentation] Isolation and molecular characterization of multidrug-resistant strains of Escherichia coli and Salmonella from retail chicken meat in Japan2008

    • Author(s)
      Tadashi Shimamoto
    • Organizer
      1 st International Meeting on Antimicrobial Resistance in Zoonotic Bacteria and Foodborne Pathogens
    • Place of Presentation
      Copenhagen, Denmark
    • Year and Date
      2008-06-17
    • Related Report
      2008 Annual Research Report

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Published: 2008-04-01   Modified: 2018-03-28  

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