Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Isolation of Fibrinolytic Enzyme and β-Glucosidase Producing Strains from Doenjang and Optimum Conditions of Enzyme Production

된장으로부터 혈전용해능 및 β-Glucosidase 활성을 가진 균주 분리 및 효소생산 배지의 최적화

  • 나경수 (대구공업대학 식품영양과) ;
  • 오성훈 (안산공과대학 식품생물공학과) ;
  • 김진만 (고려대학교 병설 보건대학 식품영양과) ;
  • 서형주 (고려대학교 병설 보건대학 식품영양과)
  • Published : 2004.02.01
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Abstract

Bacterial strains showing the firinolytic and $\beta$-glucosidase activity were screened from Doeniang. The strain of KH-15 revealed a high level of fibrinolytic and $\beta$-gluocosidase activity. The isolated bacterium was identified and desingnated as Bacillus sp. KH-15. The carbon, nitrogen and salts sgnificantly influenced te fibrinolytic enzyme and $\beta$-glucosidase production. The optimized composition of medium appeared to be 2％ glucose, 0.5% yeast extract and 0.1% calcium chloride. The optimum pH and temperature for fibrinolytic enzyme and $\beta$-glucosidase activities were pH 7∼8, 4$0^{\circ}C$ and pH 6∼8, 30∼4$0^{\circ}C$, respectively.

재래식 된장으로부터 혈전용해능과 $\beta$-glucosidase효소를 생산하는 미생물을 분리하였으며, 분리한 균의 형태학적, 생화학적인 분류를 수행하여 Bacillus속으로 동정하였으며, Bacillus sp. KHI-15로 명명하였다 그리고 분리한 균주의 효소생산을 위한 배지조건과 배양조건을 측정하였다. 선발균주는 2% glucose, 0.5% yeast extract, 0.1% calcium chloride의 최적 배지에서 최대의 효소생산을보였다. 초기 pH7∼8과 4$0^{\circ}C$에서는 혈전용해능이 최대를 보였으며, 초기 pH6∼8과 30∼4$0^{\circ}C$에서는 $\beta$-glucosidase 효소활성의 생산이 가장 높았다.

Keywords

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