Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Development of Fusant Degrading Aniline and 4-chlorobiphenyl by Spheroplast Fusion between Pseudomonas sp. and Flavimonas oryzihabitans

Flavimonas oryzihabitans와 Pseudomonas sp.간 원형질체 융합에 의한 Aniline과 4-chlorobiphenyl 분해균주 개발

  • 박형수 (삼성엔지니어링 기술연구소) ;
  • 박용근 (고려대학교 생명공학원) ;
  • 김무훈 (삼성엔지니어링 기술연구소) ;
  • 고범준 (삼성엔지니어링 기술연구소) ;
  • 조미영 (삼성엔지니어링 기술연구소) ;
  • 김치경 (충북대학교 자연과학대학 미생물학과)
  • Published : 2000.12.01
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Abstract

Spheroplast cell fusions were performed with Flavimonas oryzihabitans degrading aniline and Pseudomonas sp. degrading 4-chlorobiphenyl to develope the new fusant degrading aniline and 4-CBP and its characters were investigated. F. oryzihabitans was induced to antibiotic marker ($Cm^r$ by NTG treatment for the fusants selection. The results of spheroplast formation and regeneration frequencies of the strains treated with lysozyme-EDTA were 99% and 5.0~6.6%, respectively. Fusion products were treated with 40% (v/v) PEG 6000 and fusion frequency was $3.16{\times}10^{-4} $. The DNA content of fusant, F22 was approximately 2-fold compared with parents. The fusant was stable, and showed the mixed biochemical characteristics of the parent strains. F22 was similar to parent for cell growth pattern and degrading capacity on 5 mM aniline but cell growth rate of F22 was 1.5-fold higher than that of the parent on 10mM aniline. However 4-CBP degrading ability of F22 was slightly lower than that of parental strain.

아닐린분해능이 있는 Flavimonas oryzihabitans과 4-chlorobiphenyl (4-CBP)를 분해하는 Pseudomonas sp.를 원형질체 융합하여 아닐린과 4-CBP를 모두 분해하는 융합균주를 개발하고, 융합체의 특성을 조사하였다. F. oryzibhavitans는 융합체 선별표지 위애 NTG처리하여 chloramphenicol 내성 ($Cm^r$)을 유발하였다. Lysozyme-EDTA에 의한 각 모균주의 원형질체 생성율은 약 99%이었고, 원형질체의 재생율은 5.0~6.6%이었다. 원형질체는 40% PEG 6000을 사용하였을 때 효과적으로 융합이 이루어졌으며 융합율은 $3.16{\times}10^{-4} $이었다. 융합균인 F22의 DNA양는 모균주에 비해 약 2배 정도 증가 하였으며, 생화학적 특성은 모균주의 특성이 혼합하여 나타났다. F22는 5 mM 아닐린 최소배지에서는 모균주와 성장능과 분해능이 거의 비슷하였고, 10 mM 아닐린 최소배지에서는 1.5배 빠른 성장속도를 나타내었으나, 4-CBP 분해능은 모균주보다 약간 낮게 나타났다.

Keywords

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