摘要
目的:为了研究p53codon72多态的功能,采用定点诱变法构建人p53基因的多态质粒。方法:设计带有突变碱基的引物,通过PCR扩增引入突变碱基,再将突变后的p53序列插入载体中,经测序确定所扩增的DNA序列,并用体外转录翻译系统制备p53蛋白和i ASPP蛋白,免疫沉淀法检测蛋白相互作用。结果:通过PCR获得的含突变碱基的p53序列经连接后插入真核表达载体pReceiver-M01中,构建了p53多态位点为72Arg的表达质粒pReceiver-M01-p53(Arg72)。测序证明序列正确,表达的p53蛋白能与i ASPP相互作用,具有生物学功能。结论:成功构建了p53多态(72Arg)真核表达载体,为进一步深入研究p53多态的生物学功能奠定了基础。
OBJECTIVE:To investigate the function of p53 polymorphic variants,we constructed the p53 codon 72 polymorphic plasmid.METHODS:Primers carrying the appropriate mutation were employed in a two-step PCR amplification.The mutated PCR products were subsequently cloned into pReceiver-M01 expression vector.The p53 protein translated in vitro was used to interact with iASPP to certify its biological activity.RESULTS:The sequence of the recombinant eukaryotic expression vector containing CCC to CGC mutation was proved by DNA sequencing.This p53 polymorphic variant could interact with iASPP,implying its biological activitical.CONCLUSION:The recombinant p53 eukaryotic expression vector containing codon 72 polymorphism was constructed successfully,laying a foundation for further studies on the function of p53.
出处
《癌变.畸变.突变》
CAS
CSCD
2010年第3期182-185,共4页
Carcinogenesis,Teratogenesis & Mutagenesis
基金
国家自然科学基金资助项目(30971140)
重庆市科委自然科学基金资助项目(CSTC
2008BA5003)
关键词
p53多态
定点诱变
重叠延伸PCR
p53 polymorphism
site-directed mutagenesis
overlap extension PCR