摘要
【目的】本试验旨在构建A型H7N9流感病毒RNA聚合酶类蛋白PB1和PB2真核表达载体,并在293T细胞中表达其编码的蛋白。【方法】首先提取苏州分离株A型H7N9流感病毒的总RNA,通过RT-PCR技术获得了A型H7N9流感病毒PB1和PB2的全长基因,然后将其克隆至真核表达载体pRK中构建pRK-Flag-PB1/PB2真核重组表达载体,经酶切及测序鉴定正确后将质粒转染到293T细胞中,通过Western blot鉴定PB1/PB2蛋白的表达。【结果】成功克隆了PB1和PB2全长基因,构建了A型H7N9流感病毒PB1和PB2蛋白真核表达载体pRK-Flag-PB1/PB2,并在293T细胞中转染表达,Western blot确定了PB1/PB2蛋白的成功表达。【结论】该表达载体的成功构建及在293T细胞中成功表达PB1和PB2蛋白,为后期开展流感病毒蛋白功能及与真核细胞中的蛋白相互作用的研究奠定了基础。
【Objective】This study aimed to construct the eukaryotic expression vector for non-structural proteins PB1 and PB2 of type A H7 N9 influenza virus and express the encoded protein in 293 T cells. 【Method】First, the total RNA of influenza virus type A H7 N9 isolated from Suzhou isolate was extracted, and the full-length genes of type A H7 N9 influenza virus PB1 and PB2 were obtained by RT-PCR technique, and then cloned into the eukaryotic expression vector pRK to construct pRK-Flag-PB1/PB2 eukaryotic recombinant expression vector was confirmed by restriction enzyme digestion and sequencing. The validated plasmid was then transfected into 293 T cells, and the expression of PB1/PB2 protein was identified by Western blot. 【Result】The full-length genes of PB1 and PB2 were successfully cloned, and the pRK-Flag-PB1/PB2 eukaryotic expression vectors for PB1 and PB2 of type A H7 N9 influenza virus were constructed and transfected into 293 T cells. The result of Western blot confirmed successful expression of PB1/PB2 protein. 【Conclusion】The successful construction of the expression vector and successful expression of PB1 and PB2 proteins in 293 T cells laid the foundation for the later investigation of influenza virus protein function and interaction with proteins in eukaryotic cells.
引文
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