›› 2010, Vol. 37 ›› Issue (2): 93-95.

• 生物技术 • 上一篇    下一篇

牦牛病毒性腹泻病病毒E2基因的克隆及序列分析

胡炳峰1,刘亚刚1,王文伯1,杨晓农1,于吉峰2,冯英阳1,王盼盼1   

  1. (1.西南民族大学生命科学与技术学院, 成都 610041; 2.四川省畜牧科学研究院, 成都 610066)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-02-20 发布日期:2010-02-20

Cloning and Sequence Analysis of the E2Gene of Bovine Viral Diarrhea Virus Strain Yak

HU Bing- feng1, LIU Ya- gang1, WANG Wen- bo1, YANG Xiao- nong1, 
YU Ji- feng2, FENG Ying- yang1, WANG Pan- pan1
  

  1. (1.College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China;2.Sichuan Animal Science Academy, Chengdu 610066, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-02-20 Published:2010-02-20

摘要:

摘要:〖HT5”SS〗根据GenBank中已发表的多株牛病毒性腹泻病毒的E2基因序列比较分析设计了3对引物,应用RTPCR方法首次扩增出牦牛病毒性腹泻病毒的E2基因区637 bp的片段序列,经pMD18- T载体连接后克隆、测序,并与已发表的NADL、Osloss、Oregon C24V等毒株E2基因序列进行系统发育进化树比对分析,结果表明,牦牛病毒性腹泻病毒的E2基因无插入或缺失,系统发育进化分析表明,与其他毒株核苷酸同源性较低,最高仅为68.8%,推导氨基酸序列为68.4%。较低的同源性表明牦牛病毒性腹泻病毒存在较大的基因突变或者可能还具有独立的衍化来源。

关键词: 关键词:牦牛病毒性腹泻病毒; E2基因; 克隆; 序列分析

Abstract: Abstract: According to the E2 genes of bovine viral diarrhea virus (BVDV) which were obtained from GenBank, the target fragment of about 640 bp of isolate Yak was amplified by reverse transcription polymerase chain reaction (RT- PCR), cloned into pMD18- T vector and sequenced. The positive recombinant clone was identified by restriction enzyme digestion. Sequence comparison and phylogenetic analyses showed that isolate Yak fall into the BVDV genotype 1 and were distant from other subgroups. There is no insertion or variation of E2gene. It had the highest sequence identity (68.8%) with the Australia Braidwood strain. The low sequence identity with other BVDV- 1 strains indicate that strain Yak had an independent evolutional pathway.

Key words: Key words: Yak; bovine viral diarrhea virus; E2 gene; clone; sequence analysis