中国畜牧兽医

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新型重配A(H7N9)流感病毒NA基因序列分析

刘永宏,赵丽,代艳艳   

  1. (塔里木大学动物科学学院,新疆生产建设兵团塔里木畜牧科技重点实验室,新疆阿拉尔 843300)
  • 收稿日期:2013-08-28 出版日期:2014-02-20 发布日期:2014-03-27
  • 通讯作者: 赵丽(1982—),女,内蒙古人,博士,副教授,研究方向:传染病与免疫病理学。
  • 作者简介:刘永宏(1981—),男,内蒙古人,博士,副教授,研究方向:传染病与免疫病理学。
  • 基金资助:

    新疆生产建设兵团博士资金(2011BB022、2012BB023);国家级大学生创新项目(2013107570030)。

Sequence Analysis of NA Gene of the Novel Reassortment Influenza A (H7N9) Virus

LIU Yong-hong, ZHAO Li, DAI Yan-yan   

  1. (Key Laboratory of Tarim Animal Husbandry Science and Technology of Xinjiang Production & Construction Corps, College of Animal Science, Tarim University, Alar 843300, China)
  • Received:2013-08-28 Online:2014-02-20 Published:2014-03-27

摘要: 试验旨在分析2013年新型重配A(H7N9)流感病毒分子流行病学特点。作者从GenBank数据库下载不同分离宿主的流感毒株NA全基因序列,应用分子生物学软件进行遗传进化分析。结果显示,2013年新型重配A(H7N9)流感毒株NA蛋白颈部氨基酸发生缺失,其唾液酸结合(HB)位点发生一定程度适应性变化,NA蛋白糖基化位点为7个,NA蛋白酶活性中心未发生变异。与A/Hangzhou/1/2013(H7N9)株中NA片段的核苷酸同源性较高的前10个序列均分离自亚洲5个国家的禽类,同源性达96%以上。至于此次新型重配A(H7N9)流感毒株NA基因是否是禽传给人尚不清楚,还有待进一步研究。

关键词: A型流感病毒; 神经氨酸酶; 遗传进化分析

Abstract: The assay was aimed to analyze the molecular epidemiological character of influenza A (H7N9) virus in 2013. The complete genome sequences of NA of influenza virus strains from different discrete host sources downloaded from the GenBank were analyzed on genetic evolution by DNAStar software in this research. The results showed that, the neck amino acids of NA in influenza A (H7N9) virus in 2013 was deleted; HB site of NA took adaptive changes in certain degrees; the active site of proteases of HA with seven glycosylation sites was unchanged; the top ten high nucleotide homology strains with HA of A/Hangzhou/1/2013(H7N9) had isolated from poultry in five Asian countries, the nucleotide homology was more than 96%. It was not clear whether the NA gene of novel reassortment influenza A (H7N9) virus strains was avian-to-human transmission and needed further study.

Key words: influenza A virus; neuraminidase; genetic evolution analysis