›› 2015, Vol. 42 ›› Issue (2): 270-274.doi: 10.16431/j.cnki.1671-7236.2015.02.005

• 生物技术 • 上一篇    下一篇

弓形虫细胞核因子3基因的克隆及序列分析

胡玲英1,2, 张念章2, 高琦2,3, 朱兴全2, 王寿昆1   

  1. 1. 福建农林大学动物科学学院, 福建省动物药物工程实验室, 福州 350002;
    2. 中国农业科学院兰州兽医研究所, 家畜疫病病原生物学国家重点实验室, 甘肃省 动物寄生虫病重点实验室, 兰州 730046;
    3. 华南农业大学兽医学院, 广州 510642
  • 收稿日期:2014-09-09 出版日期:2015-02-20 发布日期:2015-02-13
  • 通讯作者: 王寿昆 E-mail:wsk138@163.com
  • 作者简介:胡玲英(1987-),女,江西鄱阳人,硕士生,研究方向:动物病原与分子生物学研究,E-mail:294341219@qq.com
  • 基金资助:
    国家自然科学基金项目(31172316);甘肃省创新研究群体计划项目(1210RJIA006);福建省教育厅科技项目(JK2011052);龙岩市科技计划项目(2012LY45)

Cloning and Sequence Analysis of Toxoplasma gondii NF3 Gene

HU Ling-ying1,2, ZHANG Nian-zhang2, GAO Qi2,3, ZHU Xing-quan2, WANG Shou-kun1   

  1. 1. Engineering Laboratory of Animal Pharmaceuticals, College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
    2. Key Laboratory of Veterinary Parasitology of Gansu Province, State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China;
    3. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
  • Received:2014-09-09 Online:2015-02-20 Published:2015-02-13

摘要: 为研究中国特色品系荷包猪SLA-DRa基因(又称SLA-DRa-HB),本试验设计引物,RT-PCR扩增3个个体荷包猪SLA-DRa全基因编码区,并克隆至pMD18-T载体,转化大肠杆菌JM109感受态细胞,经酶切鉴定后筛选阳性克隆测序,比较分析与其他SLA-DRa等位基因的差异,并绘制分子进化树。结果显示,RT-PCR成功扩增出目的基因条带,大小约800 bp。经克隆测序后分析,SLA-DRa-HB基因全长为779 bp,编码区为1-759,共编码252个氨基酸。序列对比分析结果显示,SLA-DRa-HB的特征性变异集中在135、159、202位点。而穿膜区和胞浆功能区(203-252)变异位点为206、248。分子进化树分析显示,SLA-DRa-HB自成一系,且与其他等位基因的进化关系较近。本研究成功克隆荷包猪SLA-DRa基因,为进一步研究其功能奠定基础。

关键词: 弓形虫; 弓形虫细胞核因子3基因; 克隆; 生物信息学分析

Abstract: In order to predict the possibility of Toxoplasma gondii nuclear factor 3 (TgNF3) as anti-Toxoplasma gondii vaccine candidate,TgNF3 gene was amplified by one step RT-PCR using a pair of specific primers.Then the fragments were cloned into the pMD18-T vector.The sequence of TgNF3 gene was then translated into amino acids and analyzed by bioinformatics software.The physical and chemical characteristics,hydrophilic domain,transmembrane domain,epitopes,and advanced structure of TgNF3 were predicted by multiple bioinformatics approaches.The results revealed that TgNF3 gene was approximate 950 bp in length.TgNF3 protein was predicted to contain only one transmembrane domain,9 α-helix regions,4 β-fold regions,8 hydrophilic regions and 10 flexible regions,and predicted to contain 9 linear B cell epitopes.The results indicated that TgNF3 could be a vaccine candidate antigen against Toxoplasma gondii,which provided the basic data for development of novel Toxoplasma gondii vaccines.

Key words: Toxoplasma gondii; Toxoplasma gondii nuclear factor 3 (TgNF3) gene; clone; bioinformatics analysis

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