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新型甲型H_1N_1流感毒株NA基因特征和进化 被引量:4

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摘要 目的通过对新型甲型H1N1流感毒株神经氨酸酶(NA)基因序列的变异分析,揭示毒株NA基因变异与进化。方法检测广东地区分离毒株NA基因核苷酸序列,同时对全球新型甲型H1N1流感毒株NA基因进行检索下载,采用Lasergene 7.1软件比对和分析NA基因核苷酸和氨基酸序列,结合临床资料分析变异基因进化,同时分析糖基化位点。结果 2009年4-12月69株毒株NA基因16个氨基酸位点置换,占3.41%(16/469);NA蛋白主要置换位点在V106I/H和N248D。毒株GD-801-2009(H1N1)和GD-1202-2009的NA基因明显受到的感染宿主选择性作用,而毒株GD-1-2009的NA基因明显受到的感染宿主负选择性作用。与毒株GD-1-2006(H5N1)NA基因比较,毒株GD-801-2009的NA基因插入Nt145-204,导致H1N1NA蛋白增加第49~68位氨基酸(CNQSVITYENNTWVNQTYVN),其中包括4个糖基化位点。结论广东新型甲型H1N1流感毒株NA基因正向不同方向进化;新型甲型H1N1流感NA蛋白新增4个糖基化位点。
出处 《第三军医大学学报》 CAS CSCD 北大核心 2010年第15期1675-1677,共3页 Journal of Third Military Medical University
基金 国家自然科学基金(30972757)
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