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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Gamma Irradiation on the Conformational Changes of Garlic (Allium sativum) Protein, Allivin

감마선 조사가 마늘(Allium sativum) 단백질 Allivin의 구조적 변화에 미치는 영향

  • 김미리 (충남대학교 식품영양학과) ;
  • 이주운 (한국원자력연구소 방사선식품·생명공학기술개발팀) ;
  • 변명우 (한국원자력연구소 방사선식품·생명공학기술개발팀) ;
  • 서지현 (한국원자력연구소 방사선식품·) ;
  • 육홍선 (충남대학교 식품영양학과) ;
  • 김미정 (안양대학교 식품영양학과)
  • Published : 2002.10.01
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Abstract

Conformational changes of allivin, a major allergen protein in garlic, by gamma irradiation were observed. Allium solution (3.0 mg/mL in 0.01 M PBS, pH 7.4) and raw garlic were irradiated in a gamma irradiation facility to be absorbed with doses of 2.5, 5.0, 7.5 and 10.0 kGy. After irradiation, a half of irradiated allivin solution was filtered through 0.22 ${\mu}{\textrm}{m}$ filtration kit. UV spectrum and SDS-PAGE were used for observing the conformational changes of allivin by gamma irradiation. Turbidity of allivin solution was increased by optical observation, and the result was validated by the increase of absorbance at 660 m. Turbidity of irradiated and filtered allivin solution significantly (p<0.05) decreased, and the concentration of soluble protein in the solution decreased by increase of the dose. Aggregation among allivin molecules was observed by SDS-PAGE, but irradiated and filtered samples showed decrease of allivin with reducing aggregation trend. SDS-PAGE profiles of irradiated raw garlic were not different. Results indicate that gamma irradiation can decrease the allivin in solution state which may impact on allergenic reaction of garlic.

감마선 조사에 의 한 마늘의 주요 알러젠 단백질인 allivin의 구조적 변화를 관찰하였다. Allivin 용액 (3.0 mg/mL in 0.01 M PBS, UH 7.4)과 생 마늘에 2.5, 5.0, 7.5, 10.0 kGy의 흡수선량을 갖도록 감마선을 조사하였다. 조사 후 용액의 절반을 0.22$\mu\textrm{m}$ filter로 여과하여 준비하였다. 감마선 조사에 의한 allivin의 변화는 UV spectrum과 SDS-PAGE를 사용하여 관찰하였다. 가시적으로 관찰하였을 때, 조사선량이 증가할수록 allivin 용액의 혼탁도가 증가하였으며 ,660 nm 파장에서의 흡광도의 증가로 확인할 수 있었다. 조사 후 여과한 allivin 용액의 UV spectrum 측정에서 혼탁도의 변화가 크게 감소되었으며, 선량이 증가할수록 용해된 단백질의 농도가 소하였다. SDS-PAGE시험에서 감마선 조사된 allivin의 큰 변화는 관찰되지 않았으나, 분자간 응집이 관찰되었다 그러나, 조사 후 여과한 시료에서 는 allivin의 감소가 관찰되었으며, 분자간 응집으로 발생된 끌림도 감소하였다. 생마늘에 대한 전기영동 결과는 차이가 없었다. 이 결과들은 감마선 조사가 수용액 상태에서 allivin의 알러지성을 감소시킬 수 있음을 시사한다.

Keywords

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