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人硫氧还蛋白基因真核表达载体的构建及其在COS-7细胞中的表达

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摘要 目的克隆人硫氧还蛋白(hTRX)cDNA序列,进行真核表达载体的构建。方法应用RT-PCR技术,以胎肝组织细胞总RNA为模板,扩增出hTRX成熟蛋白的cDNA基因,并克隆至pUCm-T载体中,经PCR和测序鉴定正确后,再构建重组真核表达载体pcDNA3.0-hTRX,采用PCR、双酶切和基因测序鉴定;利用阳性脂质体Lipofectamine将其转入COS-7细胞(瞬时表达细胞),RT-PCR检测其表达情况。结果将所得序列与GenBank(J04026)提供的序列比较,其酶活性中心(Trp-Cys-Gly-Pro-Cys)和基序与已知序列一致;PCR、酶切及测序鉴定表明真核表达载体构建正确;COS-7细胞中有hTRX的表达。结论成功克隆编码hTRX成熟蛋白的cDNA基因,构建其真核表达载体pcDNA3.0-hTRX,并在COS-7细胞中得到了表达,为进一步探讨hTRX的生物活性和应用奠定了基础。
出处 《中国老年学杂志》 CAS CSCD 北大核心 2011年第16期3096-3099,共4页 Chinese Journal of Gerontology
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