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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Characteristics of Crude Protease from Fruits and Traditional Korean Fermentation Starters

과일과 전통발효제로부터 추출한 단백질분해 조효소의 비교 특성

  • 유선아 (동신대학교 식품영양학과) ;
  • 서승호 (동신대학교 식품영양학과) ;
  • 현서연 (동신대학교 식품영양학과) ;
  • 손홍석 (동신대학교 식품영양학과)
  • Received : 2013.05.09
  • Accepted : 2013.07.09
  • Published : 2013.09.30
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Abstract

In this study, we ascertained the characteristics of crude protease extracted from fruits (fig, kiwifruit and pineapple) as well as traditional Korean fermentation starters (bio nuruk, traditional nuruk, meju and rice koji) to determine their suitability for industrial application. Crude protease extracted from traditional Korean fermentation starters was found to have a higher optimum temperature ($70^{\circ}C$) and salt concentration (1~3%) but a lower optimum pH (3~6) value compared to the corresponding values for the protease extracted from fruits. On comparison, the total activities of protease per gram unit follow the order: bio nuruk> rice koji> traditional nuruk> fig> pineapple> meju> kiwifruit. Based on our results, we conclude that protease extracted from traditional Korean fermentation starters has potential for application in food industry, for example, as a meat tenderizer for sausage manufacturing and as a protease for cheese production.

본 연구에서는 과일(무화과, 키위, 파인애플)에서 추출한 단백질분해 조효소와 전통발효제(개량누룩, 전통누룩, 메주, 입국)에서 추출한 단백질분해 조효소의 특징을 비교하였다. 전통발효제에서 추출한 단백질분해 조효소는 과일에서 추출한 단백질분해조효소보다 높은 온도($70^{\circ}C$), 높은 염 내성(1~3%), 그리고 낮은 pH(3~6)에서 활성을 보였다. 같은 조건에서 활성을 비교하였을 때, 바이오 누룩>입국>전통누룩>무화과>파인애플>메주>키위 순으로 활성이 높았다. 이러한 결과는 과일에서 추출한 단백질분해 조효소보다 전통발효제에서 추출한 단백질분해 조효소의 활성이 우수하고 고온, 산성, 그리고 염의 조건에서도 활성이 저하되지 않으므로, 소시지나 치즈 제조 등의 다양한 식품산업에 이용될 수 있는 가능성을 보여준다.

Keywords

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