The Optimal Culture Condition for the Collagenolytic Protease Production from Vibrio vulnificus CYK279H

Vibrio vulnificus CYK 279H에서 Collagenolytic Protease 생산을 위한 최적배양조건

  • Published : 2004.08.01

Abstract

A marine bacterium for producing an collagenolytic protease was isolated from the southern sea of Korea and identified as Vibrio vulnificus and named as Vibrio vulnificus CYK279H. This strain producing an collagenolytic protease was showed high activity toward collagen and gelatin as substrate. The optimum initial pH, NaCl, and temperature for cell growth and protease production was 7.5, 2.0% and 25$^{\circ}C$, respectively. Optimization for collagenolytic protease production was composed of 0.3% D-galactose, 0.6% yeast extract, 4.0% gelatin, 0.2% (NH$_4$)$_2$SO$_4$, and 0.2 mM ferric citrate in artificial sea water. The maximum protease production was required gelatin and yeast extract. The collagenolytic protease production by Vibrio vulnificus CYK279H reached a maximum of 73 unit/l after the cultivation for 18 h under the optimized medium.

해양유래미생물에서 gelatin 분해능이 우수한 균주 Vibrio vulnificus CYK 279H를 이용하여 최적 효소활성조건을 검토하였다. 온도와 초기 pH는 $25^{\circ}C$, 7.5에서 높은 것으로 나타났으며, 단당, 이당, 다당류를 첨가하여 탄소원의 영향에서는, 0.3% (w/v) galactose 에서, 유$.$무기 질소원으로는 0.6% (w/v) yeast extract와 4.0% (w/v) gelatin, 0.2% (w/v) (NH$_4$)$_2$SO$_4$에서 효소활성이 가장 높게 나타났다. 염 농도로는 2.0% (w/v) NaCl, 금속이온은 Fe$^{2+}$를 첨가하였을 때 효소활성이 증가되었다. 선정된 최적배양조건에서 Vibrio vulnificus CYK 279H를 배양한 결과, 18 h 배양시 73 Unit/1로 기본배지 20 Unit/1보다 활성이 3.7배 증가한 것으로 확인되었다.

Keywords

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