食品科学 ›› 2008, Vol. 29 ›› Issue (11): 465-468.

• 生物工程 • 上一篇    下一篇

牛乳β-乳球蛋白过敏原线性表位串联体的分子设计

 韩婷, 高金燕, 李欣, 陈红兵   

  1. 南昌大学食品科学与技术国家重点实验室; 南昌大学中德联合研究院; 南昌大学食品系;
  • 出版日期:2008-11-15 发布日期:2011-12-08

Molecular Design of A Tandem of Multiple Epitopes of β-lactoglobulin Allergen from Cow Milk

 HAN  Ting, GAO  Jin-Yan, LI  Xin, CHEN  Hong-Bing   

  1. 1.State Key Laboratory of Food Science and Technology,Nanchang University,Nanchang 330047,China; 2.Sino-German Joint Research Institute,Nanchang University,Nanchang 330047,China;3.Department of Food Science,Nanchang University,Nanchang 330047,China
  • Online:2008-11-15 Published:2011-12-08

摘要: 本实验以牛乳β-乳球蛋白中与人血清IgE结合的7个B细胞表位(B1、B2、B3、B4、B5、B6和B7)和1个T细胞表位(T)为研究对象,旨在使设计出的牛乳β-乳球蛋白多表位串联体分子中各表位能够保留独立的抗原性。按照表位串联体设计原则,B细胞表位之间的连接序列为甘氨酸(G),T细胞与B细胞表位之间的连接序列为两个赖氨酸(KK)。通过生物信息学的研究,借助DNAStar软件和SOMPA网络服务器,对这8个表位连接顺序进行优化组合后,设计出的串联体分子组合结构为:T-K-K-B1-G-B6-G-B5-G-B3-G-B7-G-B2-G-B4,其氨基酸序列是:KIPAVFKIDALNENKVLVLDTKKLIVTQTMKGEVDDEALEKFDKALKALPGKTKIPAVFKIDAGKPTPEGDLEILLQKGKALPMHIRLSFNGLLDAQSAPLRVYVEELKPGAQKKIIAEKTKI。经过预测,该串联体中各表位均呈现出了抗原性,且没有新的表位产生。研究结果表明,分子设计正确,研究方法值得同类工作借鉴。

关键词: &beta, -乳球蛋白, 表位串联体, 表位预测, 食物过敏

Abstract: Seven B-cell IgE-binding epitopes(B1,B2,B3,B4,B5,B6,B7) and a T-cell epitope(T) in β-lactoglobulin from cow milk was used to design a tandem of multiple epitopes of the β-lactoglobulin from cow milk,in which the epitopes remain their independent antigenicity.According to the epitope tandem design principle,the linker between B cell epitopes is a glycine(G) while it is a di-lysine(KK) between T cell epitope and B cell epitope.The connection order of the eight epitopes was optimized through bioinformatics methods using the software of DNAStar and the network server-SOMPA.The optimized tandem molecular is:T-K-K-B1-G-B6-G-B5-G-B3-G-B7-G-B2-G-B4.And its amino acid sequence is:KIPAVFKIDALNENKVLVLDTKKLIVTQTMKGEVDDEALEKFDKALKALPGKTKIPAVFKIDAGKPTPEGDLEILLQ KGKALPMHIRLSFNGLLDAQSAPLRVYVEELKPGAQKKIIAEKTKI.The results showed that the molecular designation is correct,and the study methods are worth using reference to similar studies.

Key words: &beta, -lactoglobulin; tandem; epitope prediction; food allergy;