中国寄生虫学与寄生虫病杂志 ›› 2012, Vol. 30 ›› Issue (4): 20-331-332.

• 研究简报 • 上一篇    下一篇

微小牛蜱磷酸丙糖异构酶基因片段的克隆与原核表达

梁怡琳,高攀,柯泽楷,罗新萍*,刘志刚   

  1. 深圳大学过敏反应与免疫学研究所,深圳 518060
  • 出版日期:2012-08-30 发布日期:2012-10-26

Cloning and Expression of Triosephosphate Isomerase Gene of Boophilus microplus

LIANG Yi-lin,GAO Pan,KE Ze-kai,LUO Xin-ping*,LIU Zhi-gang   

  1. School of Medicine,Shenzhen University,Shenzhen 518060,China
  • Online:2012-08-30 Published:2012-10-26

摘要: 为克隆和表达微小牛蜱磷酸丙糖异构酶(triosephosphate isomerase,Tim)编码基因,提取微小牛蜱成虫总RNA,采用RT-PCR方法扩增目的基因,将其连入pMD-18T载体,经酶切和测序鉴定后,将正确的目的基因与pET-28a表达载体连接,并转入大肠埃希菌(E. coli)Rosetta  (DE3)中,异丙基-β-D-硫代半乳糖苷(IPTG)诱导表达后,经十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)鉴定分析。结果发现,克隆所得的微小牛蜱成虫tim基因片段长度为750 bp(登录号为JX112888),其中开放阅读框为750 bp,编码249个氨基酸,与微小牛蜱胚胎中克隆出的tim基因序列的同源性为99%。SDS-PAGE结果显示,重组蛋白Tim相对分子质量(Mr)约为27 000。

关键词: 微小牛蜱, 磷酸丙糖异构酶, 克隆, 表达

Abstract: Total RNA was extracted from adult Boophilus microplus. RT-PCR was used to amplify the gene and the fragment was subcloned into the expression vector pET-28a. The cloned gene was expressed in E. coli Rosseta(DE3), induced by IPTG, and identified by SDS-PAGE. The results showed that the triosephosphate isomerase (tim) gene of B. microplus has 750 bp and encodes 249 amino acids (GenBank No. JX112888). The cloned tim gene shares 99% homology with that in tick embryos. The relative molecular weight (Mr) of the expressed recombinant protein is about 27 000.

Key words: Boophilus microplus, Triosephosphate isomerase, Cloning, Expression