中国寄生虫学与寄生虫病杂志 ›› 2002, Vol. 20 ›› Issue (6): 6-341.

• 论著 • 上一篇    下一篇

旋毛虫p49基因的克隆、序列分析及表达

温艳;甘绍伯;劳为德;高虹;张传生;刘思国
  

  1. 北京热带医学研究所;北京热带医学研究所;中国科学院遗传发育生物学研究所;中国科学院遗传发育生物学研究所;中国科学院遗传发育生物学研究所;中国科学院遗传发育生物学研究所 北京 100050;北京 100050;北京 100080;北京 100080;北京 100080;北京 100080
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-12-30 发布日期:2002-12-30

Cloning, Sequencing and Expression of Trichinella spiralis p49 Gene

WEN Yan;LAO Wei-de;GAO Hong;ZHANG Chuan-sheng;LIU Si-guo;GAN Shao-bo   

  1. 1 Beijing Tropical Medicine Research Institute;Beijing 100050; 2 Institute of Genetics and Developmental Biology;Chinese Academy of Sciences;Beijing 100080
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-12-30 Published:2002-12-30

摘要:   目的 获得旋毛虫排泄分泌抗原(excretory antigen,ES)p49基因的克隆、测序及表达。 方法 通过RT-PCR,从旋毛虫幼虫总RNA中扩增得到特异片段,利用TA克隆将PCR产物克隆入pUC-T载体中并进行测序及同源性比较,并定向克隆到表达载体pEG-4T-3中,转化感受态细胞,诱导表达。 结果 RT-PCR扩增得到p49基因,其核苷酸序列与已发表的p49基因序列一致;BLAST分析表明其与旋毛虫p49基因、43 KDa分泌性糖蛋白同源性均为99%。经SDS-聚丙烯酰胺凝胶电泳,重组蛋白诱导表达在67 KDa处有一新蛋白带。 结论 提取旋毛虫幼虫总RNA,用RT-PCR方法克隆并表达了p49基因。

关键词: 旋毛虫, p49基因, 基因克隆, 表达

Abstract:  Objective To conduct cloning, sequencing and expression of Trichinella spiralis ES antigen p49 gene. Methods RT-PCR was used to amplify the specific gene fragment from the total RNA of Trichinella spirais larvae. The PCR product was ligated to the T-vector and the recombinant plasmid was verified by sequencing. T-p49 and pGE-4T-3 were treated by both BamHI and XhoI. The ligation reaction was catalyzed by T4 DNA ligase. Results The p49 gene was cloned by using RT-PCR. Sequence analysis showed that the p49 gene obtained was consistent to the p49 sequence reported in the database. The expressed protein was shown as a new band at SDS-PAGE. BLAST analysis demonstrated that this p49 gene was 99% identical to the p49 gene reported and to the 43 kDa secreted glycoprotein gene in the database. Conclusion p49 gene from Trichinella spiralis larvae was cloned, sequenced and expressed.

Key words: Trichinella spiralis, p49 gene, gene cloning, expression