Applied Biological Chemistry

  • 제50권1호
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  • Pages.12-17
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  • 2007
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  • 2468-0834(pISSN)
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  • 2468-0842(eISSN)
한국응용생명화학회 (The Korean Society for Applied Biological Chemistry)
권호 표지

Biosurfactant를 생산하는 Bacillus subtilis TBM 3101의 생리학적 특성

Physiological Characteristics of Biosurfactant-Producting Bacillus subtilis TBM 3101

  • Kim, Seon-A (Department of Biology, Changwon National University) ;
  • Lee, Young-Guen (School of Applied Life Science, Pusan National University) ;
  • Choi, Yong-Lark (Department of Biotechnology, Faculty of Natural Resources and Life Science, Dong-A University) ;
  • Hwang, Cher-Won (Institute of Bioscience and Technology, Handong University) ;
  • Jeong, Yong-Kee (Department of Biotechnology, Faculty of Natural Resources and Life Science, Dong-A University) ;
  • Joo, Woo-Hong (Department of Biology, Changwon National University)
  • 발행 : 2007.03.31
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초록

태백산 토양에서 유화활성과 안정도가 높은 biosurfactant 생산균주 TBM 3101을 분리하여 동정한 결과 B. subtilis로 판명되었다. B. subtilis TBM 3101의 배양액에서 표면장력은 최저 29mN/m까지 감소되었고, 이후 장시간 계속 유지되었다. 또한, tributyrin을 기질로 사용하였을 때 2.68로 가장 큰 유화력을 보였고, 그 외에 soybean oil, crude oil, tetradecane 에서도 비슷한 활성을 보였다. 각종 다른 합성계면활성제의 유화활성 및 안정성을 고려하여 비교 분석한 결과 B. subtilis TBM 3101 생산하는 biosurfactant는 tween류와 span 85와 유사한 유화활성을 나타내었고, tween 80과 triton X-100과 비슷한 유화 안정도를 보여주었다.

A biosurfactant-producing strain, Bacillus subtilis TBM 3101 was isolated from the soil sample at Tae-Baek Mountain through an antifungal test and emulsification assessment. The strain was assessed, regarding to the microbial growth, by physical and chemical test, surface tension, emulsification activity and stability. The surface tension of the isolate sharply decreased to the minimum 29mN/m at 48 h growth. Of note, its emulsification was stabilized to the highest degree when tributyrin was utilized as a substrate, indicating that in comparison to a variety of synthetic surfactants, the biosurfactant produced by the isolate was significantly similar to synthetic surfactant, tween 20. In addition, the biosurfactant showed high emulsification activity when soybean oil, crude oil and tetradecane were used as a substrate. Thus, these studies could contribute to the detection and development of biosurfactant beneficial to the environment and humans.

키워드

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