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-  2016 

lefty1基因真核表达载体构建鉴定及转染 Constuction and Identification of Lefty1 Gene Eukaryotic Expression Vector

Keywords: lefty1,真核表达载体,Flag标签

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Abstract:

目的:构建lefty1基因与pcDNA3.1(+)相融合的真核表达载体,并在lefty1基因的下游加上Flag标签,转染人肾小管上皮细胞株验证重组质粒活性。方法:设计并合成lefty1基因上下游引物,同时加上Flag标签序列,PCR扩增基因,并将其连接到真核表达载体pcDNA3.1(+)上,双酶切图谱分析和扩增产物测序鉴定所构建的真核表达载体。脂质体转染法将重组质粒pcDNA3.1(+)-lefty1-Flag和pcDNA3.1(+)分别转染至人肾小管上皮细胞株HK-2,qPCR和Western blot检测lefty1在mRNA和蛋白水平的表达。结果:以lefty1基因质粒模板扩增得到的片段约1 150bp,双酶切得到目的基因片段,测序的结果显示与lefty1基因序列相同。转染肾小管上皮细胞后,pcDNA3.1(+)-lefty1-Flag能表达lefty1蛋白。结论:成功构建lefty1基因真核表达载体,为一步研究lefty1基因功能奠定了基础

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