目的:将人类Tudor-SN蛋白SN(1~4)基因片段分别定向连入pERFP-C1质粒,使Tudor-SN蛋白SN各功能片段与红色荧光蛋白在HeLa细胞内融合表达。方法:以重组质粒pSG5-Tudor-SN-flag为模板,PCR法扩增出目的基因,利用EcoRⅠ和BamHⅠ双酶切法将目的片段连接到pERFP-C1载体上,再将构建成功的pERFP-C1-Tudor-SN-SN(1~4)重组质粒转染入HeLa细胞内,在荧光显微镜下观察红色荧光蛋白的表达。结果:以单/双酶切及基因测序法鉴定构建的重组质粒均无误,荧光显微镜下观察到红色融合蛋白的表达。结论:重组pERFP-C1-h Tudor-SN-SN(1~4)质粒构建及表达成功。
Objective: To construct eukaryotic red fluorescent protein (RFP) expressing recombinant plasmids,pERFP-C1-hTudor-SN-SN(1-4),which contain SN((1-4) fragments of human Tudor-SN.Methods: The genes of Tudor-SN fragments were amplified by PCR from the recombinant pSG5-Tudor-SN-flag plasmid and inserted into pERFP-C1 fluorescent expressing vector with EcoRⅠ and BamHⅠ site.These recombinant pERFP-C1-hTudor-SN-SN (1-4) plasmids were transfected into HeLa cells and the expression of red fluorescent fusion proteins was examined by fluorescence microscope.Results: The SN(1-4) fragments of Tudor-SN were sequenced correctly and detected in the products of the restriction single/double enzyme digestion.The red fluorescent fusion proteins were observed in HeLa cell after the transfection.Conclusion: These recombinant eukaryotic plasmids of pERFP-C1-Tudor-SN(1-4) were constructed successfully and expressed effectively.