中国畜牧兽医

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弓形虫DOC2基因C-端的克隆及序列分析

高琦1,2,张念章2,胡玲英2,3,周东辉2,朱兴全2,翁亚彪1   

  1. 1.华南农业大学兽医学院,广东广州 510642;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,甘肃兰州 730046;3.福建农林大学动物科学学院,福建福州 350002
  • 收稿日期:2014-04-14 出版日期:2014-08-20 发布日期:2014-08-22
  • 通讯作者: 翁亚彪(1963—),男,副教授,硕士生导师,研究方向:动物寄生虫病的防控技术。E-mail: ybweng@qq.com
  • 作者简介:高琦(1990—),女,湖南人,硕士生,研究方向:动物寄生虫分子生物学。
  • 基金资助:

    国家自然科学基金项目(31230073、31172316);甘肃省创新研究群体计划项目(1210RJIA006)。

Cloning and Sequence Analysis of C-terminal of Toxoplasma gondii DOC2 Gene

GAO Qi1,2, ZHANG Nian-zhang2, HU Ling-ying2,3, ZHOU Dong-hui2,ZHU Xing-quan2,WENG Ya-biao1   

  1. 1.College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, 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 Animal Science,Fujian Agriculture and Forestry University, Fuzhou 350002, China
  • Received:2014-04-14 Online:2014-08-20 Published:2014-08-22

摘要: 为研究弓形虫DOC2基因作为弓形虫疫苗候选抗原分子的可行性,本试验用RT-PCR技术扩增DOC2基因编码区的C-端并测序。将该基因片段用生物信息学软件翻译为氨基酸序列后,预测弓形虫DOC2蛋白C-端的生物学特性、高级结构和B细胞抗原表位。结果表明,DOC2基因C-端片段长度为1887 bp。将其翻译成氨基酸序列后预测含有11个亲水区域和7个跨膜区。二级结构中含有19个α-螺旋、1个β-转角和17个无规则卷曲。结合柔性区域等分析,DOC2蛋白C-端共含有12个线性B细胞抗原表位。结果表明DOC2蛋白C-端可作为弓形虫疫苗候选分子,为研制新型弓形虫DNA疫苗或表位肽疫苗提供理论基础。

关键词: 弓形虫; DOC2基因; 克隆; 生物信息学分析

Abstract: In order to evaluate whether Toxoplasma gondii DOC2 gene could be used as a vaccine candidate antigen, the C-terminal of DOC2 gene was amplified by RT-PCR and then sent for sequencing. After translated the gene sequence into amino acid sequence, the basically biological characters, advanced structures and linear B cell epitopes of the C-terminal of DOC2 gene were predicted using multiple bioinformatics analysis. The results showed that the length of C-terminal of DOC2 gene was 1887 bp. The C-terminal of DOC2 protein was predicted contain 11 hydrophilic regions, 7 transmembrane domains,19 alpha regions, 1 beta turn, 17 random coils and 12 B cell epitopes, which suggested this protein was a probable vaccine candidate against Toxoplasma gondii infection.

Key words: Toxoplasma gondii; DOC2 gene; clone; bioinformatics analysis