›› 2015, Vol. 42 ›› Issue (11): 2856-2861.doi: 10.16431/j.cnki.1671-7236.2015.11.006

• 生物技术 • 上一篇    下一篇

猪源大肠杆菌O157:H7鞭毛蛋白抗原表位分析及验证

林敏玲1,2, 李军2,3, 潘艳2,3, 陈泽祥2,3, 杨威2,3, 胡庭俊1   

  1. 1. 广西大学动物科学技术学院, 南宁 530005;
    2. 广西畜禽疫苗新技术重点实验室, 南宁 530001;
    3. 广西兽医研究所, 南宁 530001
  • 收稿日期:2015-04-13 出版日期:2015-11-20 发布日期:2015-11-26
  • 通讯作者: 杨威, 胡庭俊 E-mail:gxyangwei@163.com;tingjunhu@gxu.edu.cn
  • 作者简介:林敏玲(1990-),女,广东佛山人,硕士生,研究方向:兽医药理学及毒理学,E-mail:1091979492@qq.com
  • 基金资助:
    广西自然科学基金(桂科自2014GXNSFAA118119);广西科研基本业务费专项(桂科专项14-3);广西畜禽疫苗新技术重点实验室专项(13-051-27-A-3)

Antigen Epitopes Analysis and Verification of Escherichia coli O157:H7 Flagellin

LIN Min-ling1,2, LI Jun2,3, PAN Yan2,3, CHEN Ze-xiang2,3, YANG Wei2,3, HU Ting-jun1   

  1. 1. College of Animal Science and Technology, Guangxi University, Nanning 530005, China;
    2. Guangxi Key Laboratory of Animal Vaccines and New Technology, Nanning 530001, China;
    3. Guangxi Veterinary Research Institute, Nanning 530001, China
  • Received:2015-04-13 Online:2015-11-20 Published:2015-11-26

摘要: 利用生物信息学分析大肠杆菌O157:H7鞭毛蛋白FliC的二级结构及亲水性、抗原指数、柔性区域和表面可能性等指数,预测大肠杆菌O157:H7鞭毛蛋白FliC的潜在B细胞抗原表位,为其致病性研究提供理论基础。利用DNAStar软件Protean程序中Garnier-Robson方法和Chou-Fasman方法分析鞭毛蛋白FliC的α-螺旋、β-折叠、转角区域和卷曲区域,通过Kyte-Doolittle方法、Karplus-Schulz方法、Emini方法和Jameson-Wolf方法分析鞭毛蛋白FliC的亲水性、柔性区域、表面可能性和抗原指数。综合分析得出鞭毛蛋白FliC 63-74、236-247、338-349、460-471、542-553位氨基酸序列为潜在的B细胞优势抗原表位。化学合成法合成优势抗原表位338-349和460-471肽段,免疫BALB/c小鼠3次后,采用ELISA方法验证抗体水平。ELISA结果显示,338-349、460-471肽段具有很强的抗原性,能引起BALB/c小鼠产生高滴度的抗体。

关键词: 大肠杆菌O157:H7; 鞭毛蛋白; B细胞抗原表位; 免疫

Abstract: To understand the pathogenicity of Escherichia coli O157:H7,the secondary structures,hydrophilicity plot,antigenic index,flexibility plot and surface probability plot of the flagellin FliC of Escherichia coli O157:H7 were analyzed by bioinformatics.The α-helix,β-sheet,turn and coil regions of flagellin FliC were analyzed by the methods of Garnier-Robson and Chou-Fasman of DNAStar software,hydrophilicity plot was used the method of Kyte-Doolittle,the flexibility plot was based on the Karplus-Schulz method,surface probability plot and antigenic index were analyzed by the methods of Emini and Jameson-Wolf,respectively.The results showed that 63 to 74,236 to 247,338 to 349,460 to 471 and 542 to 553 amino acid sites of flagellin FliC might be B cell antigen epitopes.338 to 349 and 460 to 471 peptides were synthesized by chemical synthesis,and then subcutaneously immunized BALB/c mice three times.Antibody response was evaluated by ELISA.The result showed that 338 to 349 and 460 to 471 peptides could induce BALB/c mice to produce high titer antibody.

Key words: Escherichia coli O157:H7; flagellin; B cell antigen epitopes; immunity

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