Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Characterization of Actinomyces Isolated from Freshwater Sponges in Lake Baikal

바이칼의 담수 스폰지에서 분리한 방선균의 특성 연구

  • Jung, You-Jung (Department of Environmental Science, Kangwon National University) ;
  • Joung, Yo-Chan (Department of Environmental Science, Kangwon National University) ;
  • Ahn, Tae-Seok (Department of Environmental Science, Kangwon National University)
  • Received : 2011.02.23
  • Accepted : 2011.06.28
  • Published : 2011.06.30
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Abstract

Five strains of Actinomyces were isolated from freshwater sponges, Baikalospongia and Lubomirskia, in Lake Baikal. By 16S rRNA sequencing, isolates were identified as Streptomyces griseoplanus, S. halstedii, S. violascens, S. flavovirens, and S. microflavus. Isolates had different characteristics of growth temperature, carbon utilization, enzyme activity, and cellular fatty acid composition. Optimum growth conditions of isolates were $30-37^{\circ}C$, pH 8-9, and 0-1.5% salt concentrations. Major fatty acid compositions were anteiso-$C_{15:0}$, iso-$C_{15:0}$, and iso-$C_{16:0}$. Strain ATS-BA-19 had DNase and chitinase activities and strain ATS-BA-16 had cellulase and protease activities. Colonies of strain ATS-BA-15 and ATS-BA-19 made inhibition zone of Pseudomonas aeruginosa.

러시아의 바이칼에 존재하는 고유종인 Baikalospongia과 Lubomirskia의 sponge로부터 방선균을 분리하였다. 분리된 방선균은 16S rRNA gene 분석 결과, Streptomyces griseoplanus, S. halstedii, S. violascens, S. flavovirens, S. microflavus에 각각 속하였다. 이 방선균들은 온도, 탄소이용, enzyme 활성, fatty acid 조성 등의 실험 결과에서, 각각 서로 다른 특징을 나타냈었다. 분리된 방선균의 배양온도는 30-37, pH는 8-9, 염분농도는 0-1.5에서 가장 잘 자라는 것으로 확인되었다. 주요 cellular fatty acid는 anteiso-$C_{15:0}$, iso-$C_{15:0}$ and iso-$C_{16:0}$로 나타났다. 특히 ATS-BA-19는 DNase와 chitinase 활성을 나타내었고, ATS-BA-16는 cellulase와 protease 활성을 나타내는 것으로 확인되었다. 또 두개의 분리된 방선균에서 그람음성 균주인 Pseudomonas aeruginosa에서 생장을 저해함을 확인하였다.

Keywords

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