›› 2009, Vol. 36 ›› Issue (2): 62-67.

• 生物技术 • 上一篇    下一篇

鸭源H5N1亚型高致病性禽流感病毒的分离鉴定及其HA和NA基因的生物信息分析

孙恩成1,刘春国2,侯喜林1,刘明2,朴范泽1   

  1. (1.黑龙江八一农垦大学 动物科技学院,大庆 163319;2.中国农业科学院哈尔滨兽医研究所 兽医生物技术国家重点实验室 禽流感国家参考实验室,哈尔滨 150001) 
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-02-20 发布日期:2009-02-20
  • 通讯作者: 侯喜林

Identification and Biological Information Analysis of H5N1 Subtype High  Pathogenic Avian Influenza Virus Isolated from Duck

SUN En-cheng1, LIU Chun-guo2,HOU Xi-lin1,LIU Ming2,PIAO Fan-ze1
  

  1. (1.Heilongjiang August First Land Reclamation University, Academy of Animal Science and Technology, Daqing 163319, China; 2.Animal Influenza Laboratory of the Ministry of Agriculture, National Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute of Chinese Academy of Agricultural Sciences, Harbin 150001, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-02-20 Published:2009-02-20
  • Contact: HOU Xi-lin

摘要: 分离到1株 H5N1亚型高致病性禽流感病毒, 经序列测定发现HA蛋白裂解位点上插入多个连续的碱性氨基酸(PQREIRRKKR*G),从分子上证实是一株高致病性禽流感病毒。核酸序列比较分析结果表明,分离的流感病毒HA基因与A/duck/VietNam/Ncvd1/2002(H5N1)同源率最高,达到98.8%;NA基因与A/duck/VietNam/Ncvd1/2002(H5N1) 和A/chicken/Jiangsu/cz1/2002(H5N1)同源率最高,达到98.7%。氨基酸水平上,HA与A/duck/Viet Nam/Ncvd1/2002(H5N1)同源率最高,可达99.3%;NA与A/chicken/Jiangsu/cz1/2002(H5N1)同源率最高,达98.7%。HA与NA基因的潜在糖基化位点与作者所选参比毒株一致。通过遗传进化树分析结果表明,A/duck/VietNam/Ncvd1/2002(H5N1)可能是该毒株的来源株。

关键词: 禽流感病毒; 血凝素基因; 神经氨酸酶基因; 生物信息分析

Abstract:

A H5N1 subtype avian influenza virus isolated from duck belongs to high pathogenic avian influenza virus. HA and NA gene of the solated strain shares 98.8% and 98.7% nucleotide sequence identity to the HA gene of A/duck/VietNam/Ncvd1/2002(H5N1) and the NA gene of A/duck/VietNam/Ncvd1/2002(H5N1) and A/chicken/Jiangsu/cz1/2002(H5N1), and shares 99. 3% and 98.7% amino acid sequence identity to the HA protein of A/duck/Viet Nam/Ncvd1/2002(H5N1) and the NA protein of A/chicken/Jiangsu/cz1/2002(H5N1). There is several continuous basic amino acid(PQREIRRKKR*G) at the cleavage site of HA protein show its a high pathogenic avian influenza virus, and compared with the other influenza viruses the isolated strain has no difference in Nglycosylation sites. Phylogenetic trees analysis of HA and NA gene suggests that the isolated influenza virus probably originated from the A/duck/Viet Nam/Ncvd1/2002(H5N1).

Key words: avian influenza virus; HA gene; NA gene; biological information analysis

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