人ureb1在大肠杆菌中高效表达及其抗体的制备

High efficient expression of GST-hureb1 and generation of anti hureb1 antibody

目的 :构建人的ureb1(hureb1)原核高效表达重组质粒 ,以此表达的外源蛋白为抗原制备抗ureb1的抗体。方法 :用XhoI/NotI从pGU 2质粒酶切得到hureb1的ORF与pGEX 4T 2的XhoI/NotI大片段连接 ,构建表达GST hureb1融合蛋白的重组载体。转化大肠杆菌BL2 1(DE3) ,IPTG诱导表达。以粗制的GST hureb1融合蛋白分别免疫大白兔和小鼠 ,制备抗hureb1的多克隆抗体和单克隆抗体 ,采用WesternBlot进行特异性鉴定。结果 :构建了高效表达GST hureb1融合蛋白的原核表达载体 ,融合蛋白的表达量占菌体蛋白质总量的 33 45 %。以大肠杆菌表达的GST hureb1融合蛋白免疫动物制备了高滴度、高特异性的抗hureb1的抗体。结论 :利用重组GST hureb1融合蛋白免疫动物可获得高滴度的抗hureb1抗体。重组GST

Objective:To construct high level prokaryotic cell expression vector carrying human upstream regulatory element binding protein1 (hureb1) gene for producing GST hureb1 fusion protein and generating anti hureb1 antibody Methods: After the Xho I/Not I fragment from hureb1 open reading frame was recombined into the prokaryotic expression vector pGEX 4T 2, the vector was transformed into E coli BL21(DE3) strain and induced with IPTG to express the fusion protein, GST hureb1 The crudely isolated fusion protein was applied to immunize rabbit and mouse for generating anti hureb1 polyclonal antibody and monoclonal antibody respectively Results:The prokaryotic expression vector expressing GST hureb1 fusion protein was constructed and induced to produce high level GST hureb1 that was detected up to 33 45% of the total bacterial protein expressed The GST hureb1 fusion protein immunizing animals generated high titer and specific anti hureb1 antibodies Conclusion:Recombinant hureb1 protein and anti hureb1 antibodies can be used to analyze the biological functions of hureb1