生物技术通报 ›› 2013, Vol. 0 ›› Issue (4): 116-122.

• 研究报告 • 上一篇    下一篇

溶藻弧菌HY9901 外膜蛋白OmpH 的基因克隆及其生物信息学分析

周泽军1,2,3, 庞欢瑛1,2,3, 丁燏1,2,3, 简纪常1,2,3, 吴灶和2,3,4   

  1. 1. 广东海洋大学 水产学院,湛江 524088 ;2. 广东省水产经济动物病原生物学及流行病学重点实验室,湛江 524088 ;3. 广东省教育厅 水产经济动物病害控制重点实验室,湛江 524088 ;4. 仲恺农业工程学院,广州 510225
  • 收稿日期:2012-10-08 修回日期:2013-04-22 出版日期:2013-04-22 发布日期:2013-04-22
  • 作者简介:周泽军,男,硕士研究生,研究方向:水产经济动物病害;E-mail :zhouzejun0929@126.com
  • 基金资助:
    国家重点基础研究发展计划(2011CB111601),国家自然科学基金项目(30972271),广东省教育厅育苗基金项目(B12121)

Molecular Cloning and Bioinformatics Analysis of Outer Membrane Protein H Gene from Vibrio alginolyticus Strain HY9901

Zhou Zejun1,2,3, Pang Huanying1,2,3, Ding Yu1,2,3, Jian Jichang1,2,3, Wu Zaohe2,3,4   

  1. 1. Fisheries College of Guangdong Ocean University,Zhanjiang 524088 ;2. Guangdong Provincial Key Laboratory of Pathogenic Biology and Epidemiology for Aquatic Economic Animals,Zhanjiang 524088 ;3. Key Laboratory of Diseases Controlling for Aquatic Economic Animals of Guangdong Higher Education Institutions,Zhanjiang 524088 ;4. Zhongkai University of Agriculture and Engineering,Guangzhou 510225
  • Received:2012-10-08 Revised:2013-04-22 Published:2013-04-22 Online:2013-04-22

摘要: 根据已发表的溶藻弧菌(Vibrio alginolyticus)全基因组序列设计1 对特异性引物,PCR 扩增溶藻弧菌HY9901 株外 膜蛋白OmpH 的全长基因。结果显示,该基因(GenBank 登录号:JX855924)全长573 bp,共编码190 个氨基酸残基。根据推导 的氨基酸序列预测其分子量约为21.1 kD,等电点为9.02。SignalP 4.0、TMHMM Server 2.0 和SoftBerry-Psite 预测结果显示,OmpH 不存在信号肽与跨膜区,含有1 个N-糖基化位点,6 个磷酸化位点,1 个内质网靶信号位点以及3 个微体C 末端靶信号位点。利 用MAGE5.0 软件,以邻位相连法构建OmpH 系统进化树,结果显示,溶藻弧菌OmpH 与副溶血弧菌(Vibrio parahaemolyticus)、哈 氏弧菌(Vibrio harveyi)等有较近亲缘关系。采用多种参数成功预测了OmpH 可能的B 细胞抗原优势表位,分别是第5-10、106- 110、120-125、158-163 和175-180 区段。利用SWISS-MODEL 软件,模拟了OmpH 亚基三维结构模型,且与其同源蛋白大肠杆菌 (Escherichia coli)Skp 蛋白有相似构型。

关键词: 溶藻弧菌, 基因克隆, OmpH, 基因, 外膜蛋白, 生物信息学分析

Abstract: Primers for PCR cloning were designed according to the whole genome sequence of vibrio alginolyticus published in GenBank. The outer membrane protein H(OmpH)gene of V.alginolyticus strain HY9901 was amplified by PCR and cloned into pMD18-T vector to investigate the possibility of OmpH as a candidate antigen for vaccine production. Sequence analysis revealed that OmpH gene(GenBank Number :JX855924)is 573 bp and encodes a putative protein of 190 amino acids. The predicted molecular weight(MW)of OmpH was 21.1 kD with an estimated pI of 9.02. Using SignalP 4.0 and TMHMM Server 2.0 software, and it was predicted that the OmpH protein did not contain a signal peptide or a transmembranous region. This protein had one N-glycosylation site, six phosphorylation sites, one endoplasmic reticulum targeting sequence and three microbodies C-terminal targeting signals predicted by SoftBerry-Psite software. To further analyze the evolutionary relationship among OmpH, a molecular phylogenetic tree was constructed using MEGA5.0 software. In this tree, the OmpH protein showed high genetic relationship with Vibrio parahaemolyticus and Vibrio harveyi. Using bioinformatices softwares and methods, the B-cell preponderant epitopes of OmpH were localized in the regions of 5-10、106-110、120-125、158-163 and 175-180. The three-dimensional structure of OmpH was determined using SWISS-MODEL work-space and it had a similar structure with Skp protein of Escherichia coli. These results can provide a basis for further studies on the immunogenecity of OmpH and vaccine preparation.