生物技术通报 ›› 2014, Vol. 0 ›› Issue (3): 159-164.

• 研究报告 • 上一篇    下一篇

绵羊肺炎支原体DnaK B细胞抗原表位预测及其蛋白结构分析

王慧1, 罗成波3, 贺纛3, 孔令萍3, 周碧君1,2, 文明1,2, 程振涛1,2 , 王开功1,2   

  1. (1.贵州大学动物科学学院,贵阳 550025;2.贵州省动物疫病研究室,贵阳 550025;3.黔西南州疫病预防控制中心,兴义 562400)
  • 收稿日期:2013-09-06 出版日期:2014-03-29 发布日期:2014-03-31
  • 作者简介:王慧,女,硕士研究生,研究方向:动物疫病病原学;E-mail:274218370@qq.com
  • 基金资助:
    黔西南州种草养羊产业发展省州科技合作专项项目(黔西南科合[2012]5号),贵州省自然科学技术基金(黔科合J字[2011]2332号),贵州省农业科技攻关项目(黔科合NY字[2011-3105]号),贵州省动物疫病与兽医公共卫生重点实验室培育(黔科合计Z字[2011]4008号),贵州省重大科技专项计划资助项目(黔科合重大专项字[2011]6009号)

Analysis of Structure and B Cell Epitope Predicition of Mycoplasmaovipneumoniae DnaK Protein

Wang Hui1, Luo Chengbo3, He Dao3, Kong Lingping3, Zhou Bijun1,2, Wen Ming1,2, Cheng Zhentao1,2, Wang Kaigong1,2   

  1. (1.College of Animal Science,Guizhou University,Guiyang 550025;2.Laboratory for Animal Disease of Guizhou,Guiyang 550025;3. Center for Animal Disease Control of Qianxinan in Guizhou Province,Xingyi 562400)
  • Received:2013-09-06 Published:2014-03-29 Online:2014-03-31

摘要: 以绵羊肺炎支原体(Mo)热休克蛋白Hsp70(DnaK蛋白)氨基酸序列为基础,运用DNAStar软件和在线服务器等生物信息学分析工具,在同源性分析的基础上,通过Jameson-Wolf法、Kyte-Doolittle法、Emini法、Karplus-Schulz法及Welling法分别预测其抗原指数、亲水性、柔韧性、表面可极性等参数,综合分析、预测了该蛋白的B细胞抗原表位,并进行了蛋白的二级结构预测和3D结构模拟。结果表明,Mo 贵州分离株的Hsp70蛋白与其它可致羊发病支原体的Hsp70蛋白同源性较低,说明该蛋白具有良好的特异性;Mo Hsp70蛋白整体抗原性较好,同时呈现较规则的空间结构,其中以C末端较稳定,区域也最大(第394-598区段),为优势B细胞抗原表位区域。

关键词: 绵羊肺炎支原体, DnaK蛋白, 蛋白结构, B细胞抗原表位

Abstract: The study is based on the amino acid sequence of heat shock protein Hsp70(DnaK protein)of Mycoplasma ovipneumoniae(Mo)separatated in guizhou province, using bioinformatics methods—DNA Rtar software and online server bioinformatics analysis tools, through the Jameson-Wolf method, Kyte-Doolittle method, Emini method, Welling method and Karplus-Schulz method respectively forecast the parameters, such as antigenic index, hydrophilic, flexibility and surface polarity, and comprehensive analysis, forecasts the B-cell epitopes of the protein, at the same time protein secondary structure prediction and simulation of 3D structure. Results showed that Hsp70 protein of Mo has a low homology with other mycoplasma which can make the sheep disease, explain the protein has good specificity. Mo Hsp 70 protein is an good antigenicity, presents the rules of spatial structure, while C-Terminal(394-598 aa)is more stable and largest region, might be advantage B-cell epitope regions.

Key words: Mycoplasma ovipneumoniae, DnaK protein, Protein structure, B cell epitope