筛选与克隆丙型肝炎病毒NS5A蛋白结合蛋白的基因

SCREENING AND CLONING OF THE GENES OF PROTEIN INTERACTING WITH THE NONSTRUCTURAL PROTEIN 5A OF HEPATITIS C VIRUS

细胞内蛋白 蛋白的结合是丙型肝炎病毒 (HCV)与宿主肝细胞相互作用的分子生物学基础。HCV的非结构蛋白 5A(NS5A)被认为是一种HCV基因组编码的重要调节蛋白因子 ,参与HCV的复制、转录和信号传导等过程 ,但是它在HCV的致病及耐药等方面的作用还存有争议。为了进一步阐明这个多功能蛋白质与宿主蛋白的关系 ,作者采用酵母双杂交系统 3,在酵母细胞融合蛋白表达型人肝cDNA文库中进行筛选 ,得到 35个与NS5A特异性结合的阳性克隆 ,包括载脂蛋白、线粒体单体型基因、磷脂酸酸性磷酸酶等 11种已知功能蛋白质基因和 3个未知功能基因。

Protein protein binding is the basis of virus and host cell interactions. With the application of technology of studying of protein interactions, more knowledge of replication and pathogenesis of hepatitis C virus (HCV) could be acquired. Non structure protein NS5A is one of the important regulatory factors in virus replication , transcription and signal transduction, but there are controversy in effect on HCV pathogenesis and resistance to interferon α(IFNα). In order to describe the relationship between NS5A and host proteins, we use yeast two hybrid system 3 to screen the gene encoding proteins that could interact with NS5A from human hepatocyte library. Thirty five clones were obtained including apo A1, apo A2, apo B100, haplotype mitochondrion complete genome, phosphatidic acid phosphatase type 2B, albumin similar to tumor endothelial marker 5 precursor, matrix metalloproteinase 14, and three of the Homo sapiens hypothetical proteins. The study paved a way for further studies on the pathogenesis of HCV NS5A