Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Screening of Fibrinolytic Enzyme Producing from Microorganisms in Korean Fermented Soybean Paste and Optimum Conditions of Enzyme Production.

된장 유래 혈전분해효소 생산균주의 분리 및 최적 효소생산 조건 탐색

  • Ok Min (Department of Functional Food Consulting, Sorabol college) ;
  • Choi Young-Su (Department of Biotechnology, Dong-A University)
  • 옥민 (서라벌대학 기능식품컨설팅과) ;
  • 조영수 (동아대학교 응용생명공학부)
  • Published : 2005.12.01
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Abstract

This study was investigated to find out optimal medium maximizing the production of fibrinolytic enzyme by Bacillus sp. isolated from Korean fermented soybean paste, which could hydrolyze the fibrin produced through the blood coagulation mechanism in human body. Among carbon sources tested, galactose was most effective for the enzyme production, and the level of the concentration for the optimal enzyme production was $4\%$(w/v). For nitrogen sources tested, malt extract was most effective for the enzyme production, and level of the concentration for optimal enzyme production was $4\%$(w/v). For mineral sources tested, $K_2HPO_4$ was most effective for enzyme production. The enzyme was maximally produced by cultivating the organism at the liquid medium of the initial pH 6 and temperature of $40^{\circ}C$.

전통발효식품인 된장으로부터 높은 활성의 fibrinolytic enzyme를 생산하는 미생물을 수십 종 분리하였다. 산업적으로 우수한 균종을 선별하기 위하여 분리된 미생물중 fibrinolytic enzyme활성과 성장 속도면에서 가장 우수한 균주를 선별하여 하였으며, 형태학적, 생화학적 및 생리학적 특성을 조사한 후 Bacillus sp.로 동정되었다. Fibrinolytic enzyme생산을 위한 최적 배양조건은 초기 pH $6\~8$일 때 상대활성도가 $80\%$이상을 나타내었고, 배양 12시간째에 가장 높은 활성도를 나타내었다. Fibrin plate를 이용한 혈전용해능을 확인한 결과 높은 혈전용해능을 가지고 있었다. 탄소원으로 galactose를 $4\%$ 첨가 하였을 때 가장 우수하였으며, 질소원은 malt extract를 $4\%$ 첨가 하였을 때 가장 우수하였다. 무기염은 $K_2HPO_4$를 첨가하였을 때 가장 우수한 활성을 나타내었다.

Keywords

References

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