• 제목/요약/키워드: pyocins

검색결과 2건 처리시간 0.014초

Profiling Pyocins and Competitive Growth Advantages of Various Pseudomonas aeruginosa Strains

  • Heo YUN-JEONG;KO KWAN SOO;SONG JAE-HOON;CHO YOU-HEE
    • Journal of Microbiology and Biotechnology
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    • 제15권6호
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    • pp.1368-1376
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    • 2005
  • Pseudomonas aeruginosa produces a variety of bacteriocidal substances including pyocins that are active against the same species, but their physiological roles are relatively unknown. Here, we profiled the bacteriocidal activities in the culture supernatants of various P. aeruginosa isolates and describe the competitive growth advantages of strains PAO1 and PA14 over some strains including PAK, which are sensitive to their bacteriocidal activities. These findings suggest that the factors governing the production of pyocins and the resistance to them play important roles in controlling P. aeruginosa populations in its local environments.

R-Type Pyocin is Required for Competitive Growth Advantage Between Pseudomonas aeruginosa Strains

  • Heo Yun-Jeong;Chung In-Young;Choi, Kelly B.;Cho, You-Hee
    • Journal of Microbiology and Biotechnology
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    • 제17권1호
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    • pp.180-185
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    • 2007
  • R-type pyocin is a bacteriophage tail-shaped bacteriocin produced by Pseudomonas aeruginosa, but its physiological roles are relatively unknown. Here we describe a role of R-type pyocin in the competitive growth advantages between P aeruginosa strains. Partial purification and gene disruption revealed that the major killing activity from the culture supernatant of PA14 is attributed to R-type pyocin, neither F-type nor S-type pyocins. These findings may provide insight into the forces governing P aeruginosa population dynamics to promote and maintain its biodiversity.