中国寄生虫学与寄生虫病杂志 ›› 2009, Vol. 27 ›› Issue (1): 23-93.

• 研究简报 • 上一篇    下一篇

细粒棘球绦虫原头蚴和成虫发育调控基因Ras GTPase的克隆及序列分析

吕国栋,王俊华,卢晓梅,温浩,林仁勇*   

  1. 新疆医科大学第一附属医院新疆包虫病基础医学重点实验室,乌鲁木齐 830054
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-02-28 发布日期:2009-02-28
  • 通讯作者: 林仁勇

Molecular Cloning and Characterization of Ras-Homologues fromDifferent Developing Stages of Echinococcus granulosus

LV Guo-dong, WANG Jun-hua, LU Xiao-mei, WEN Hao, LIN Ren-yong*   

  1. Key Laboratory of Xinjiang Hydatid Institute,The First Teaching Hospital of Xinjiang Medical University,Urumqi 830054,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-02-28 Published:2009-02-28
  • Contact: LIN Ren-yong

摘要: 应用RT-PCR方法分别从新疆株细粒棘球绦虫原头蚴和成虫中克隆出Eg Ras GTPase基因,分别命名为Eg Ras-pro(GenBank登录号为EU560397)和Eg Ras-adult(GenBank登录号为EU560398)。 生物信息学分析表明两者cDNA长度均为552 bp,编码184个氨基酸,等电点(pI)为6.54,彼此间仅有2个碱基和1个氨基酸的差别。同源性比对分析结果显示,Eg Ras-pro和Eg Ras-adult与多房棘球绦虫Ras(EmRas)基因的同源性分别高达98.4%和98.9%;与其他种类的寄生虫、酵母、果蝇及人类的Ras GTPase基因的同源性为53.9%~78.8%。进化树分析发现Eg Ras-pro和Eg Ras-adult与EmRas和血吸虫Ras(SmRas)相聚集。本研究首次从新疆株细粒棘球绦虫两个发育阶段(原头蚴和成虫)中克隆出Eg Ras GTPase基因,其序列具有较高的保守性。

关键词: 细粒棘球绦虫, Ras GTPase, 序列分析

Abstract: The Ras GTPase gene from protoscolex and adult worm of Echinococcus granulosus in Xinjiang were cloned by RT-PCR and named as Eg Ras-pro (GenBank No. EU560397) and Eg Ras-adult (GenBank No. EU560398). Sequence analysis showed that each gene had 552 bp, coding 184 aa with an pI of 6.54. Bioinformatics analysis revealed that Eg Ras-pro and Eg Ras-adult had 98.4% and 98.9% homology to Echinococcus multilocularis Ras and 53.9%~78.8% homology to other species. Phylogenetic analysis showed that Eg Ras-pro and Eg Ras-adult clustered with EmRas and SmRas. The data indicated that EgRas GTPase has been expressed from protoscolex and adult worm of Echinococcus granulosus,and both are highly conservative.

Key words: Echinococcus granulosus, Ras GTPase, Sequence analysis