中国寄生虫学与寄生虫病杂志 ›› 2002, Vol. 20 ›› Issue (3): 10-163.

• 论著 • 上一篇    下一篇

微小隐孢子虫子孢子表面抗原基因gp23的克隆和测序

何宏轩,张西臣,欧阳红生,徐卫东,陈建宝,尹继刚,李建华,杨举
  

  1. 解放军军需大学动物科技系预防兽医学教研室 长春130062
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-06-30 发布日期:2002-06-30

Cloning and Sequencing of the gp23 Gene Encoding A Surface Antigen on Sporozoites of Cryptosporidium parvum

HE Hong xuan;ZHANG Xi chen;OUYANG Hong sheng;XU Wei dong CHEN Jian bao;YIN Ji gang;LI Jian hua;YANG Ju   

  1. Faculty of Animal Science;Quartermaster University of PLA;Changchun 130062
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-06-30 Published:2002-06-30

摘要:   目的 对微小隐孢子虫子孢子表面蛋白CP2 3编码区基因gp2 3进行克隆及测序。 方法 提取牛源微小隐孢子虫卵囊基因组DNA ,用聚合酶链反应 (PCR)扩增编码CP2 3的基因 ,然后将其克隆到 pMD1 8 T载体中 ,用双脱氧链末端终止法测DNA序列。 结果与结论 获得了CP2 3的编码区基因 ,克隆出的 gp2 3基因的核苷酸与氨基酸序列长分别为 345bp和 1 1 4aa,有一个开放阅读框 ,与GenBank报道的 gp2 3基因比较 ,同源性分别为 97.3 %与 98 2 % ,在 2 32~ 2 38bp处多了 6bp。

关键词: 微小隐孢子虫, gp23基因, 基因克隆, 序列分析

Abstract:  Objective To clone and sequence the gp23 gene encoding a surface antigen on the sporozoites of Cryptosporidium parvum . Methods Genomic DNA was isolated from oocysts of Cryptosporidium parvum . The gp23 gene was amplified by polymerase chain reaction (PCR) and cloned into pMD18 T vector and sequenced by the methods of dideoxy mediated chain termination. Results and Conclusion The gp23 gene was 345 bp in length and included an open reading frame encoding a protein of 114 amino acid residues. The homology of the nucleotide and amino acid sequences of the gp23 gene was 97.3% and 98.2% to that in the GenBank, respectively. The gp23 gene cloned contained 6 nucleotides more than that in the GenBank.

Key words: Cryptosporidium parvum, gp23 gene, gene cloning, sequence analysis