›› 2013, Vol. 25 ›› Issue (5): 0-956.

• 论文 •    

11株禽多杀性巴氏杆菌OmpA基因克隆测序及其序列分析

高明燕,徐步*,龚建森,王鑫,范建华,刘学贤   

  1. 中国农业科学院 家禽研究所,江苏 扬州 225125
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-09-25 发布日期:2013-09-25

Cloning and sequence analysis of OmpA gene of 11 avian Pasteurella multocida strains

GAO Ming-yan;XYU Bu*;GONG Jian-sen;WANG Xin;FAN Jian-hua;LIU Xue-xian   

  1. Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou 225125, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-09-25 Published:2013-09-25

摘要: 为了解国内禽多杀性巴氏杆菌流行株(Pasteurella multocida,Pm)OmpA基因的变异情况,参考GenBank中已发表的多杀性巴氏杆菌序列设计一对特异性引物,采用PCR方法对11个禽Pm菌株和3个荚膜型参考株(A,B,D)的OmpA基因进行扩增,将各菌株纯化回收的扩增产物与pMD18-T载体连接,筛选阳性克隆进行测序。结果表明:14个菌株的OmpA基因开放阅读框在1 047~1 077 bp之间,其中长度为1 062 bp的有9个菌株;Signal IP 4.0预测表明,信号肽均为N端21个氨基酸残基,成熟蛋白氨基酸残基数量在327~332之间,推测的分子量为35.19~36.35 kD。与GenBank中12个菌株OmpA基因核苷酸序列比对及遗传进化分析发现,核苷酸同源性为85.3%~100%;氨基酸同源性为83.1%~100%;其中C48-1,1010,9003,890920,921012,xj等6个国内禽Pm分离株OmpA序列同源性为100%。由此可见国内禽Pm菌株OmpA基因非常保守。

关键词: 禽多杀性巴氏杆菌, OmpA基因, 序列分析, 同源性

Abstract: According to OmpA gene of Pasteurella multocida published in GenBank, a pair of primers was designed. OmpA genes were amplified from 11 avian Pasteurella multocida strains and 3 capsular-type reference strains (A, B, D)
and then cloned into pMD18-T vector and sequenced. The results showed that the ORFs of OmpA gene were between 1 047 bp to 1 077 bp. The predicted maturation protein composed of 327-332 amino-acid besides 21 amino-acid signal peptide. The relative molecular weight of the maturation protein was between 35.19 to 36.36 kD. The alignment results showed that the nucleotide sequence homologies were 85.3%-100% and the deduced amino acid homologies were 83.1%-100% in comparison with 12 reference OmpA sequences of Pasteurella multocida published in GenBank. The homologies of 6 avain Pasteurella multocida strains isolated from China OmpA sequences were 100%. The result revealed that the OmpA gene of avain Pasteurella multocida strains isolated from China is very conservative.

Key words: avian Pasteurella multocida strains, OmpA gene, sequence analysis, homology