한국식품과학회지 (Korean Journal of Food Science and Technology)

한국식품과학회 (Korean Society of Food Science and Technology)
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식용곤충 분리단백의 특성 및 활용연구

Characterization and application of the proteins isolated from edible insects

  • 김선민 (상명대학교 식품영양학과) ;
  • 안채원 (상명대학교 식품영양학과) ;
  • 한정아 (상명대학교 식품영양학과)
  • Kim, Sun-Min (Department of Food and Nutrition, Sangmyung University) ;
  • An, Chae-Won (Department of Food and Nutrition, Sangmyung University) ;
  • Han, Jung-Ah (Department of Food and Nutrition, Sangmyung University)
  • 투고 : 2019.09.27
  • 심사 : 2019.11.14
  • 발행 : 2019.12.31
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초록

국내에서 식용으로 유통 및 판매가 가능한 7종의 곤충 중 누에(Bombyx mori), 갈색거저리(Tenebrio molitor) 유충, 흰점박이꽃무지(Protaetia brevitarsis) 유충, 쌍별귀뚜라미(Gryllus bimaculatus)의 4종을 대상으로 단백질을 분리하고, 유청 단백질과 비교하여 항산화 및 영양 특성을 분석하였다. 원물시료에서 분리한 단백질의 수율은 65.0-75.0%로 나타났다. 각 단백질의 아미노산을 분석한 결과, 모든 곤충 시료에서 필수 아미노산인 Phe, Trp은 유청 단백질보다 높은 함량을 보였다. 근육생성에 도움이 되는 세 종류의 BCAA아미노산 중 Val은 모든 곤충단백질에서 유청단백과 유사한 함량을 보였으며, BCAA함량은 곤충분리단백질 중 쌍별 귀뚜라미와 갈색거저리 유충에서 그 함량이 각각 16.8과 16.4%로 가장 높아 유청단백(22.2-23%)의 73-76% 수준인 것으로 나타났다. 곤충 단백질의 총 폴리페놀함량은 유청단백보다 유의적으로 많았으며 곤충단백중에는 누에의 함량이 유의적으로 낮게 측정되었다. 항산화활성 또한 곤충단백이 유청단백보다 유의적으로 높았으며, 특히 갈색거저리 유충에서의 활성이 가장 높게 측정되었다. 관능검사결과에서는 시판 단백질파우더와 동일한 조성으로 제조했을 경우, 유청단백의 25%의 대체가 가능할 것으로 보이나 맛과 향이 대조군에 비해 많이 떨어지므로 보완할 필요가 있다. 곤충단백질은 유청단백질에 비해 BCAA함량은 다소 낮았지만 폴리페놀 함량이 높고 항산화활성이 있으므로 아미노산 조성을 참고하여 특정목적 단백질 제품으로 사용될 가능성이 높음이 확인되었다.

Proteins were isolated from four species of edible insects, Bombyx mori, B; Tenebrio molitor, T; Protaetia brevitarsis, P; and Gryllus bimaculatus, G, and their properties were analyzed and compared with those of whey proteins. The yield of the protein isolated from raw materials was 65.0-75.0%. Among three branched chain amino acids (BCAA), the amounts of valine in all the insects were similar to that of the whey protein. The BCAA content was 16.8 and 16.4% in G and T, respectively. The total polyphenolic content and the antioxidant activity of the insect proteins were significantly higher than those of the whey proteins. Based on the sensory test of the protein powder, the whey protein could be replaced by 25% of the isolated protein from the insects, but the taste and flavor needs to be improved. Although the BCAA content of insect proteins was lower than that of the whey protein (by 73-76%), their application could be useful because of high polyphenolic content and the anti-oxidative activity.

키워드

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