한국미생물·생명공학회지 (Microbiology and Biotechnology Letters)

  • 제39권3호
  • /
  • Pages.218-223
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  • 2011
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  • 1598-642X(pISSN)
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  • 2234-7305(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
권호 표지

호냉성 해양세균 Shewanella sp. L93로부터 Eicosapentaenoic Acid 생산 및 정제를 위한 최적화 조건

Optimal Condition for Eicosapentaenoic Acid Production and Purification from Psychrophillic Marine Baterium Shewanella sp. L93

  • 모상준 (명지대학교 생명과학정보학부) ;
  • 홍혜원 (한국의약품시험연구소) ;
  • 방지헌 (안양대학교 해양생명공학과) ;
  • 조기웅 (안양대학교 해양생명공학과)
  • Mo, Sang-Joon (Division of Bioscience and Bioinformatics, Myongji University) ;
  • Hong, Hye-Won (Korea Drug Test Laboratory) ;
  • Bang, Ji-Heon (Department of Marine Biotechnology, Anyang University) ;
  • Cho, Ki-Woong (Department of Marine Biotechnology, Anyang University)
  • 투고 : 2011.05.31
  • 심사 : 2011.08.05
  • 발행 : 2011.09.28
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초록

Eicosapentaenoic acid 생산 세균을 얻기 위해 1999~2000년 하계연구 기간 중에 남극 생물 및 침적토를 사용하여 600주의 균주를 분리하였고 TLC와 GC를 사용하여 오메가-3 고도불포화 지방산 EPA를 생산하는 미생물 7 주를 성공적으로 분리하였으며, 이중 EPA 생산이 가장 높은 L93 균주를 선발하였다. 16S rDNA의 염기서열 분석을 통하여 Shewanella 속으로 조사되었으며, 이에 분리된 균주를 Shewanella sp. L93라 명명하였다. EPA를 생산 최적 배양온도 $4^{\circ}C$이며, 초기 pH 7에서 최적 EPA 함량을 보였다. 아울러 염 농도는 50 %(w/v)에서 생산이 최대였다. EPA 최적 생산 조건을 이용하여 리터당 320 mg 생산할 수 있는 생산 시스템을 확립하였다. Urea 침전법과 HPLC을 이용하여 수율 72% 이상의 97% 순도를 가진 EPA를 정제할 수 있는 분리 정제 시스템 또한 본 연구를 통하여 확립하였다.

To obtain eicosapentaenoic acid (EPA)-producing bacteria, some 600 strains of bacteria were isolated from Antarctic sediment and marine organisms during the summer expedition of 1999-2000 and 7 EPA-producing bacteria were obtained through screening with TLC and GC. A strain designated as L93 showed the highest EPA production, which was gram-negative, rod-shaped bacterium. L93 strain was identified as Shewanella sp., from the sequence analysis of 16S rDNA. Optimal conditions temperature and pH for the growth and EPA production were about $4^{\circ}C$ and pH 7. In addition, its production was optimized by 50%(w/v) sea salt. We establish the optimal production system to produce about 320 mg per liter by using this optimal EPA production conditions. EPA-methyl ester was purified from cultured L93 strain to a purity of higher than 97% and typical purification yield is greater than 72% of the input amount via urea complexation and HPLC.

키워드

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