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Screening of Proteins Interacting with Nonstructural 1 Protein of H5N1 Avian Influenza Virus from T7-phage Display Library

机译:从T7噬菌体展示库中筛选与H5N1禽流感病毒非结构1蛋白相互作用的蛋白

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摘要

Avian influenza virus(AIV) nonstructural 1(NS1) gene was amplified by real-time polymerse chain reac tion(RT-PCR) and inserted into pET28a, then transformed into E. coli BL21(DE3) competent cell. With the induction of isopropyl-β-D-thiogalactoside(IPTG) and the purification of Ni-NTA column, we finally obtained purified NS1 protein. T7-phage display system was used to screen the proteins that interacted with NS1 from lung cell cDNA li brary. The selected positive clones were identified by DNA sequencing and analyzed by BLAST program in Gene Bank. Two proteins were obtained as NS1 binding proteins, Homo sapiens nucleolar and coiled-body phosphoprotein 1(NOLC1) and Homo sapiens similar to colon cancer-associated antigen. By co-immunoprecipitation and other me thods, Homo sapiens NOLC1 was found to interact with the NS1 protein, the results would provide the basis for fur ther studying biological function of NS1 protein.

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