食品科学 ›› 2007, Vol. 28 ›› Issue (8): 241-243.

• 生物工程 • 上一篇    下一篇

利用噬菌体肽库淘选玉米赤霉烯酮的模拟表位

 何庆华, 刘仁荣, 许杨   

  1. 南昌大学中德联合研究院食品科学教育部重点实验室; 江西科技师范学院生命科学院; 南昌大学中德联合研究院食品科学教育部重点实验室 江西南昌330029; 江西南昌330013; 江西南昌330029;
  • 出版日期:2007-08-15 发布日期:2011-10-24

Biopanning of Zearalenone Mimotope by Phage Displayed Peptide Bank

 HE  Qing-Hua, LIU  Ren-Rong, XU  Yang   

  1. 1.Key Laboratory of Food Science, Ministry of Education, Nanchang University, Nanchang 330029, China; 2.School of Life Science, Jiangxi Science and Normal University, Nanchang 330013, China
  • Online:2007-08-15 Published:2011-10-24

摘要: 目的:利用噬菌体肽库淘选玉米赤霉烯酮(zearalenone,ZEN)模拟表位。方法:以抗ZEN单克隆抗体为配体,利用噬菌体七肽库淘选ZEN的模拟表位,采用了逐轮减少抗体包被浓度,交换使用封阻液中蛋白质种类的方法,经三轮淘选后,随机挑取20个克隆测序并以ELISA方法及竞争ELISA实验,以确定阳性克隆。结果:获得10种序列,ELISA显示其中两种序列为阳性克隆,抑制率达90%以上,其氨基酸序列分别为DAVILLM,HHCHWWH。结论:噬菌体展示技术可淘选到ZEN的模拟表位,淘选到的噬菌体粒子可作为毒素的替代品建立免疫学检测方法。

关键词: 噬菌体展示肽库, 玉米赤霉烯酮, 模拟表位, 单克隆抗体

Abstract: Objective: To obtain mimotope of zearalenone (ZEN) by phage displayed peptide bank. Methods: The anti-ZEN monoclonal antibody was used as target for biopanning from a heptapeptide phage display bank. The concentration of antibody was reduced step by step, and different blocking buffer was alternated every round. After 3 rounds of biopanning, 20 clones were randomly selected for DNA sequencing, and assayed by ELISA and ZEN competition experiments to indentify the postive clones. Results: Ten sequences are obtained, two of which are proved to be positive. Inhibition percentages are up 90% and the amino acid sequences are DAVILLM, HHCHWWH respectively. Conclusion: The phage display technique can be successfully applied to panning the mimotope of ZEN.The aquired phages may be used as the surrogate of the toxin to establish immunoassay.

Key words: phage display peptide library, zearalenone, mimotope, monoclonal antibody