食品科学 ›› 2007, Vol. 28 ›› Issue (10): 360-363.

• 生物工程 • 上一篇    下一篇

水牛奶中β-乳球蛋白过敏原表位定位的初步研究

 李欣, 高金燕, 陈红兵   

  1. 南昌大学食品科学教育部重点实验室; 南昌大学食品系; 南昌大学食品科学教育部重点实验室 江西南昌330047南昌大学中德联合研究院; 江西南昌330047; 江西南昌330047南昌大学中德联合研究院;
  • 出版日期:2007-10-15 发布日期:2011-11-22

Primary Epitope Mapping of β-Lactoglobulin from Buffalo Milk

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

  1. 1.Key Laboratory of Food Science, Ministry of Education, 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:2007-10-15 Published:2011-11-22

摘要: 为绘制水牛奶中β-乳球蛋白的过敏原表位,本实验以兔抗水牛乳β-乳球蛋白的抗体IgG为固相筛选分子,免疫筛选噬菌体随机七肽库,采用间接ELISA和竞争抑制ELISA鉴定阳性克隆。经四轮富集后,得到16个阳性克隆子,进行测序,得到5个不同的肽段。与已知的表位比对,初步确定了六个IgG识别表位,分别为:第41~51位(VYVEELKPIPE)、第51~64位(EGDLEILLQKWENDE)、第81~96位(VFKIDALNE NKVLVLD)、第141~56位(KALPMHIRLSFNPTQL)、第127~136位(LNENKVLVLD)和第145~159位(MHIRLSFNPTQLEEQ)。

关键词: 水牛乳, &beta, -乳球蛋白, 筛选, 表位定位, 食物过敏

Abstract: To map the mimotopes of β-lactoglobulin from water buffalo milk, the specific rabbit antibody against buffalo β-lactoglobulin were used to pan the specific phage from a heptapeptide phage display library. The positive clones were identified by indirect ELISA and competitive ELISA. After fourth round enrichment , sixteen positive clones were obtained and five different clones peptide sequence were deduced by DNA sequencing. Compared with the known IgG epitopes of β-lactoglobulin, six epitopes have been identified, which are located at fragment 41~51(VYVEELKPIPE), fragment 51~64(EGDLEILLQKWENDE), fragment81~96(VFKIDALNE NKVLVLD), fragment 141~156(KALPMHIRLSFNPTQL), fragment127~136 (LNENKVLVLD) and fragment 145~159(MHIRLSFNPTQLEEQ respectively.

Key words: buffalo milk; &beta, -lactoglobulin; panning; epitope mapping; food allergy;