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H9N2亚型禽流感病毒ns1基因克隆 被引量:1

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摘要 目的克隆A/Duck/Shantou/2088/01(H9N2)亚型禽流感病毒ns1基因,构建重组融合表达载体。方法采用常规PCR方法扩增ns1基因cDNA,将扩增产物克隆入GST融合表达载体pGEX-4T-3中,构建重组质粒pGEX-4T-3/ns1,转化BL21(DE3)宿主菌;采用EcoRⅠ、XhoⅠ双酶切和序列分析鉴定插入的ns1基因;并用IPTG诱导工程菌,SDS-PAGE及Western blotting分析融合蛋白的表达。结果双酶切鉴定表明,ns1基因已正确克隆到GST融合表达载体中,测序结果证实ns1基因序列与目的基因序列完全一致。SDS-PAGE电泳显示,融合蛋白在BL21(DE3)工程菌中以可溶形式表达,重组融合蛋白GST-NS1的表达量占菌体总蛋白的20%左右。经West-ern blotting分析证实,重组融合蛋白可以被GST特异性抗体所识别。结论本实验成功克隆了H9N2亚型禽流感病毒ns1基因,构建了融合表达载体,并进行了融合蛋白的诱导表达,为进一步研究NS1蛋白在流感流行中的作用打下基础。
出处 《广东医学》 CAS CSCD 北大核心 2006年第12期1791-1792,共2页 Guangdong Medical Journal
基金 广东医学院博士启动基金(编号:XB0405)
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