食品科学 ›› 2019, Vol. 40 ›› Issue (18): 70-75.doi: 10.7506/spkx1002-6630-20181224-272

• 生物工程 • 上一篇    下一篇

牛乳αS1-酪蛋白与大豆蛋白交叉过敏原的识别鉴定

丛艳君,吕晓哲,李晔,刘迪,李邻峰   

  1. (1.北京工商大学食品与健康学院,北京食品营养与人类健康高精尖创新中心,食品添加剂与配料北京高校工程研究中心,北京 100048;2.北京友谊医院皮肤科,北京 100050)
  • 出版日期:2019-09-25 发布日期:2019-09-23
  • 基金资助:
    国家自然科学基金面上项目(31872886);“十三五”国家重点研发计划重点专项(2018YFC1604205)

Identification and Characterization of Cross-Reactive Allergens between Cow Milk αS1-Casein and Soybean Proteins

CONG Yanjun, Lü Xiaozhe, LI Ye, LIU Di, LI Linfeng   

  1. (1. Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, College of Food Science and Health, Beijing Technology and Business University, Beijing 100048, China; 2. Department of Dermatology, Beijing Friendship Hospital, Beijing 100050, China)
  • Online:2019-09-25 Published:2019-09-23

摘要: 为识别牛乳αS1-酪蛋白和大豆蛋白的交叉过敏原,鉴定其致敏特性,揭示交叉过敏机理,首先以牛乳过敏患者血清、αS1-酪蛋白小鼠单克隆抗体为探针,通过免疫印迹方法识别大豆蛋白交叉过敏原,然后通过生物信息学工具比对了交叉过敏原与αS1-酪蛋白的氨基酸序列相似性,进而通过体外消化实验和加热实验探究交叉过敏原的稳定性。结果表明:牛乳αS1-酪蛋白和大豆蛋白的交叉过敏原为β-伴大豆球蛋白α亚基(Gly m Bd 60K),十二烷基硫酸钠-聚丙烯酰氨凝胶电泳结果表明Gly m Bd 60K在2 min消化完全,并且加热对过敏原的交叉反应性没有影响。

关键词: αS1-酪蛋白, 大豆蛋白, 交叉过敏原, 稳定性

Abstract: In this paper, we firstly identified cross-reactive soybean allergens using sera from cow milk allergic infants and mouse monoclonal antibodies. Then, the amino acid sequence similarity between the cross-reactive allergens and cow milk αS1-casein was analyzed by using bioinformatics software. In addition, the stability of the cross-reactive allergens was examined to in vitro digestion in simulated gastric fluid and to heating. The results showed that α subunit of β-conglycinin (Gly m Bd 60K) was identified as cross-reactive allergen. SDS-PAGE analysis demonstrated that Gly m Bd 60K could be completely digested in 2 min. Heating did not change the cross-reactivity of Gly m Bd 60K with αS1-casein monoclonal antibodies.

Key words: αS1-casein, soybean protein, cross-reactive allergen, stability

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