抗果蝇Dxl6蛋白抗体的制备及特异性分析

Preparation and Specificity Analysis ofAnti-Drosophila Dxl6 Antibody

为了研究果蝇中SR蛋白家族新成员Dxl6的功能,通过RT PCR得到Dxl6的全长cDNA,并根据Dxl6基因产物的功能区,分别将Dxl6中间区域(Dxl6middlepart,Dxl6MP)、Dxl6C末端RS结构域(Dxl6RSdomain,Dxl6RSD)序列亚克隆至pGEX 4T 1(His)6C及pET32a表达载体中,表达和纯化获得融合蛋白。用纯化的融合蛋白GST Dxl6RSD His和GST Dxl6MP His免疫家兔,分别得到抗Dxl6RSD和抗Dxl6MP两种抗体。WESTERNBLOT结果显示两种抗体能特异地识别在原核表达系统内表达的抗原,抗Dxl6RSD的抗体对果蝇组织中的Dxl6具有较高的特异性。

In order to study the function of Dxl6 which is a novel member of SR protein family, its cDNA was cloned by RT-PCR, and the sequences of its RS domain and its middle part were subcloned into two fusion express vectors, pGEX-4T-1(His)6C and pET32a. After expressing in E.coli BL21, the truncated proteins of Dxl6 RS domain part and Dxl6 middle part in pGEX-4T-1(His)6C were purified and used to immunize rabbits. Purified antibodies against the RS domain and Dxl6 middle part were obtained by affinity chromatography with the expressed products of Dxl6 RS domain part and Dxl6 middle part in pET32a, respectively. The result shows the antibody against Dxl6 RS domain has a good specificity to Dxl6 in Drosophila larvae by Western blot analysis.