›› 2013, Vol. 40 ›› Issue (4): 13-17.

• 生物技术 • 上一篇    下一篇

弓形虫棒状蛋白17基因的克隆与序列分析

聂子雄1,2, 张念章2, 胡钱江1, 陈锐钊1,2, 周东辉2, 袁子国1, 林瑞庆1, 朱兴全2   

  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
  • 收稿日期:2012-09-18 出版日期:2013-04-20 发布日期:2013-04-19
  • 通讯作者: 张念章。E-mail:nianzhang2008@yahoo.com.cn E-mail:nianzhang2008@yahoo.com.cn
  • 作者简介:聂子雄(1987-),男,四川人,硕士生,研究方向:寄生虫分子生物学。
  • 基金资助:
    国家自然科学基金项目(31230073、31172316、31101812);全国农业科研杰出人才项目;中央级公益性科研院所基本科研业务费专项(2012ZL081);中国农业科学院院长基金项目。

Cloning and Sequence Analysis of ROP17 Gene of Toxoplasma gondii

NIE Zi-xiong1,2, ZHANG Nian-zhang2, HU Qian-jiang1, CHEN Rui-zhao1,2, ZHOU Dong-hui2, YUAN Zi-guo1, LIN Rui-qing1, ZHU Xing-quan2   

  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, CAAS, Lanzhou 730046,China
  • Received:2012-09-18 Online:2013-04-20 Published:2013-04-19

摘要: 为研究弓形虫棒状体蛋白17(ROP17)基因的遗传变异,本研究以弓形虫RH株、PRU株和TgC7株为研究对象,首次PCR扩增了其ROP17基因部分序列,将PCR产物纯化后克隆到pMD18-T并测序。将测定的序列与网上下载的弓形虫VEG株、GT1株和ME49株相应序列进行比对,然后用Mega 5.0程序的NJ法和Puzzle 5.2程序的ML法构建系统发育树。结果表明,3株弓形虫分离株的ROP17基因部分序列长度均为1375 bp,A+T含量在49.53%~50.04%之间,3个虫株相应序列的变异碱基数皆小于20个,其变异率为2.3%,氨基酸序列变异率在0~6.11%之间。系统发育结果显示, ROP17基因部分序列能区分弓形虫基因Ⅰ型和Ⅱ型的虫株。本研究结果为进一步研究弓形虫ROP17基因的变异及研制弓形虫ROP17基因的亚单位疫苗提供了理论依据。

关键词: 刚地弓形虫; ROP17基因; 克隆; 序列分析

Abstract: Toxoplasma gondii ROP17 gene was amplified from individual T.gondii strains from different geographical locations and hosts by PCR. These PCR products were subjected to be cloned and sequenced and ROP17 sequences were aligned using the ClustalX 1.81. The phylogenetic relationships among T.gondii strains were constructed using the software Mega 5.0 and Puzzle 5.2. The lengths of all ROP17 sequences were 1375 bp, and the A+T contents were 49.53% to 50.04%. The intra-specific variation among the T.gondii strains was up to 2.23%. The variation rate in amino acid sequences was 0 to 6.11%. Phylogenetic analysis revealed that ROP17 gene sequences could be used as a marker for studying genetic relationships of T.gondii isolates. The low variation in ROP17 gene sequences among T.gondii strains might indicate that ROP17 gene could be used as a potential anti-toxoplasmosis vaccine candidate molecule in further studies.

Key words: Toxoplasma gondii; ROP17 gene; clone; sequence analysis

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