mRNA encoding porcine FcR gamma subunit obtained from PAMs of 90-day piglets was transcribed into cDNA through RT-PCR. Recombinant plasmid pET-FcRγ was constructed successfully by inserting the cDNA sequence into pET-32a,and expressed as soluble protein with a molecular weight of about 29 kDa. Following purification ,recombinant protein FcRγ-His was used to immune mouse,and polyclonal antibody against it was obtained. Western-blotting indicated that such polyclonal antibody could react specifically with FcR-y-His. Indirect ELISA shows that the titer of the polyclonal antibody is 1 : 8000, revealing the good immunogenicity of FcRγ-His. All these results provide the foundation for further studying the structure and function of FcR gamma subunit.%应用RT-PCR技术从90日龄健康仔猪肺巨噬细胞中克隆出猪Fcγ亚单位的cDNA序列,并将其亚克隆到原核表达载体pET-32a中,构建重组表达质粒pET-FcRγ,成功表达了分子量约为29 kDa的γ亚单位重组蛋白.将重组蛋白FcRγ-His免疫小鼠,制备获得鼠抗FcRγ-His重组蛋白多克隆抗体,将得到的重组蛋白多克隆抗体采用间接ELISA和Western-blotting试验方法检测,ELISA测定多克隆抗体的效价为1∶8000.Western-blotting结果表明,制备的鼠抗FcRγ-His重组蛋白多克隆抗体可以与重组γ亚单位蛋白进行特异性结合,从而证明重组蛋白具有较好的免疫原性.成功克隆出猪Fc受体γ亚单位基因并表达,为进一步研究其结构与功能奠定了基础.
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