HCV核心蛋白结合蛋白基因6的克隆

目的：克隆与丙型肝炎病毒（HCV）核心蛋白结合的肝细胞中的未知蛋白基因。方法：应用酶母双杂交系统，构建丙型肝炎病毒核心蛋白诱铒质粒，转化酵母AH109后与含文库质粒的酵母Y187进行配合，在营养缺陷培养基上进行双杂交筛选。筛选出30个克隆，既能在四缺营养缺陷培养基上生长(SD/Trp-Leu-Ade-His）又能在涂有x-α-gal的四缺培养平皿上长出蓝色菌落，提取此酵母克隆的质粒，转化大肠埃希菌后进行测序，进行生物信息学分析。结果：分析结果显示，其中6号克隆的测序结果与Genbank中的2个未知功能序列有98％的同源性，初步证明了此基因与丙型肝炎病毒核心蛋白有结合性。结论：丙型肝炎病毒核心蛋白结合蛋白肝基因克隆成功。

Screening and cloning gene of hepatocyte protein interacting with hepatitis C virus core protein

OBJECTIVE: To clone the unknown gene of hepatocyte protein interacting with hepatitis C virus core protein. METHODS: Using the yeast dual hybrid system 3, bait plasmids of hepatitis C virus core were constructed. After identifying hepatitis C virus core protein that could stably expressed in AH109 yeast strains, we performed yeast two hybrid by mating AH109 with Y187 that transformed with liver cDNA library plasmids pACT2 and then plated on quadrople dropout (QDO) medium and assayed for alpha-gal activity. The genes of yeast colonies that could grow on QDO and had alpha-gal activity were sequenced. RESULTS: Among the 30 positive colonies, we blasted the gene of the sixth colony; we coined human hepatitis C virus binding protein 6(Hu Hcbp6) with Genbank, realized that the Hu Hcbp6 shares as much as 98% homology with two cDNA without knowing functions. We have proved that Hu Hcbp6 could interact with hepatitis C virus core protein. CONCLUSIONS: Hepatitis C virus core binding protein (Hu Hcbp 6 Genbank number: AY032594) was successfully cloned and identified. The study partly paved the way for investigating physiological function of the Hu Hcbp6.