食品科学 ›› 2010, Vol. 31 ›› Issue (17): 318-322.doi: 10.7506/spkx1002-6630-201017071

• 生物工程 • 上一篇    下一篇

基于表位预测的花生过敏原Ara h 6 免疫交叉反应性研究

朱 盼1,2,陈红兵1,2,*,胡纯秋1,2,李 欣1,2,罗春萍1,2,3   

  1. 1.南昌大学 食品科学与技术国家重点实验室
    2.南昌大学中德联合研究院
    3.南昌大学环境与化学工程学院
  • 收稿日期:2010-06-11 修回日期:2010-08-27 出版日期:2010-09-15 发布日期:2010-12-29
  • 通讯作者: 陈红兵 E-mail:chbgjy@hotmail.com;gjychb@yahoo.com.cn
  • 基金资助:

    南昌大学食品科学与技术国家重点实验室目标导向项目(SKLF-MB-200807);
    江西省主要学科学术和技术带头人培养项目([2004]234 号);教育部新世纪优秀人才支持计划项目(NCET-08-07-04)

Immunologic Cross-reactivity of Peanut Allergen Ara h 6 on the Basis of Epitope Prediction

ZHU Pan1,2,CHEN Hong-bing1,2,*,HU Chun-qiu1,2,LI Xin1,2,LUO Chun-ping1,2,3   

  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. School of Environmental and Chemical Engineering,
    Nanchang University, Nanchang 330047, China
  • Received:2010-06-11 Revised:2010-08-27 Online:2010-09-15 Published:2010-12-29
  • Contact: CHEN Hong-bing E-mail:chbgjy@hotmail.com;gjychb@yahoo.com.cn

摘要:

为了探讨花生过敏原Ara h 6 与其他同源蛋白之间的交叉反应,通过各种生物信息数据库(Genbank,DiscoTope)以及网络工具及软件(BLAST,NPS@和Protean,Clustal x,PyMOL),开展基于表位预测的Ara h 6交叉免疫反应性研究。结果表明:肽段AA10~15、45~48、53~60、116~118 区域可能是Ara h 6 的线性表位优势区域;Ara h 6 的构象型表位优势区有4 个,它们存在的区域为AA1~13、35~51、53~59、89~105;基于线性表位预测的15 种蛋白质与Ara h 6 可能具有交叉反应性,其中4 种(Ara i 6,conglutin,Ara d 6 和conglutin 8)发生交叉反应的概率为100%;基于构象型表位预测的17 种蛋白质与Ara h 6 可能具有交叉反应性,其中4 种(Ara i 6,conglutin,Ara d 6 和conglutin 8)发生交叉反应的概率为100%。本结果对进一步了解Ara h 6 的过敏性以及指导开展食品中Ara h 6 的免疫学检测具有重要作用。

关键词: Ara h 6, 花生过敏, 表位, 交叉反应, 预测

Abstract:

In order to explain cross-reactivity between peanut allergen Ara h 6 and other homologous proteins, various kinds of bioinformationcal databases, including Genbank and DiscoTope, and net tools/software, including BLAST, NPS@, Protean, Clustal x and PyMOL, were used for the epitope analysis between these proteins. It was indicated that the linear epitopes on Ara h 6 existed with high probability in the regions of AA10-15, 45 -48, 53 -60 and 116 -118, and the conformational epitopes in the regions of AA1-13, 35-51, 53-59 and 89-105. According to the prediction of linear epitopes, there were fifteen proteins might cross-react with Ara h 6, and the possibility of cross-reactivity of four of them (Ara i 6, conglutin, Ara d 6 and conglutin 8) was 100%. However, according to the prediction of conformational epitopes, the number of proteins could cross-react with Ara h 6 with high probability was 17, and the possibility of cross-reactivity of four of them (Ara i 6, conglutin, Ara d 6 and conglutin 8) was 100%. These investigations will be beneficial for understanding peanut Ara h 6 allergy and help to develop an approach for the immunologic detection of Ara h 6 in foods in the future.

Key words: Ara h 6, peanut allergy, epitopes, cross-reactivity, prediction

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