HZF1在大肠杆菌中的表达及多克隆抗体的制备

目的在大肠杆菌中表达HZF1融合蛋白,制备抗HZF1抗体。方法构建包含编码HZF1非锌指区DNA的重组表达质粒pET30a-HZF1,转化大肠杆菌并用异丙基-β-D-硫代半乳糖苷诱导表达相应的融合蛋白,采用镍柱纯化。以纯化蛋白作为免疫抗原,对新西兰大白兔实施多次免疫(间隔时间分别为3、2和2周)。用ELISA和Westernblot检测抗体效价和特异性。结果获得兔抗HZF1抗体,经过ELISA检测,效价在1:100000以上。Westernblot显示兔抗HZF1抗体能够特异性检测氯高铁血红素诱导的K562细胞中的HZF1蛋白。结论得到高特异性的兔抗HZF1抗体,为HZF1的功能研究以及组织和细胞中HZF1的检测奠定了一定基础。

Expression of human HZF1 in E. coli and preparation of antibody against human HZF1 protein

OBJECTIVE: To express human HZF1 fusion protein in E. coli and to obtain an anti-HZF1 antibody. METHODS: A DNA fragment encoding non-zinc finger region of HZF1 protein was inserted into pET30a vector to get the recombination expression plasmid pET30a-HZF1. E. coli was transformed with pET30a-HZF1 and the selected clones were cultured with isopropy-beta-D-thiogalactoside induction. The proteins were prepared from the culture and the fusion protein was purified by Ni column. Rabbits were immunized and reinforced three times with the purified fusion protein. The antiserum was collected and the titer and the specificity of the antibody were checked by ELISA and Western blot. RESULTS: Antibody against HZF1 was obtained and its titer was more than 1:100 000, as proven by ELISA. Western blot analysis showed specific reaction between this antibody and HZF1 fusion protein or the endogenetic HZF1 protein in hemin-induced K562 cells. CONCLUSIONS: The specific antibody against HZF1 is obtained. The antibody may have potential application in farther HZF1 function study and HZF1 determination in tissues and cells.