To obtain human tissue inhibitor of metalloproteinase-2(TIMP-2)cDNA and the secretory expression of TIMP-2 gene in Pichia pastoris,we designed and synthesized a 618 base pairs artificial gene coding for the TIMP-2 wit...To obtain human tissue inhibitor of metalloproteinase-2(TIMP-2)cDNA and the secretory expression of TIMP-2 gene in Pichia pastoris,we designed and synthesized a 618 base pairs artificial gene coding for the TIMP-2 with a computer-aided design method using a standard chemical synthesis technique,which was composed of frequently used codons in the highly expressed Pichia pastoris genes.Then the synthetic gene encoding TIMP-2 was checked by means of dideoxynucleotide sequencing.The verified gene of TIMP2 was cloned to the Escherichia coli-yeast shuttle vector of pPIC9 to construct a recombinant plasmid pPIC9-T2.The plasmid was transformed into GS115 cells of the methylotrophic yeast,Pichia pastoris by electroporation,and we got the expression cell through phenotype selection and induction with methanol.Separation,purification,and bioactivity analysis of the expressed products were performed.展开更多
利用含有强启动子 PAOX1 和 α-因子信号肽序列的巴斯德毕赤酵母载体 p PICZαA,构建出含牛白细胞介素 2(Bo IL - 2 )基因的重组质粒 Bo IL 2 - p PICZαA。线性化的重组表达载体转化到巴斯德毕赤酵母 X- 33及 KM71H中 ,筛选Zeocin高抗...利用含有强启动子 PAOX1 和 α-因子信号肽序列的巴斯德毕赤酵母载体 p PICZαA,构建出含牛白细胞介素 2(Bo IL - 2 )基因的重组质粒 Bo IL 2 - p PICZαA。线性化的重组表达载体转化到巴斯德毕赤酵母 X- 33及 KM71H中 ,筛选Zeocin高抗性酵母菌株 ,甲醇诱导目的蛋白表达。经 SDS- PAGE和 Western blot检测表明 ,Bo IL- 2以融合蛋白形式在胞内表达 ,但没能分泌到胞外。通过 Bo IL- 2在巴斯德毕赤酵母中的表达 ,重点讨论了信号肽。展开更多
将编码牛白细胞介素 - 2 (Bo IL2 )成熟肽的 c DNA克隆到巴斯德毕赤酵母 (Pichia pastoris)表达载体 p PICZB中 ,构建出含 Bo IL 2基因的重组质粒 Bo IL 2 - p PICZB。将经 Sac 酶切后线性化的 Bo IL 2 - p PICZB电转化到巴斯德毕赤酵母...将编码牛白细胞介素 - 2 (Bo IL2 )成熟肽的 c DNA克隆到巴斯德毕赤酵母 (Pichia pastoris)表达载体 p PICZB中 ,构建出含 Bo IL 2基因的重组质粒 Bo IL 2 - p PICZB。将经 Sac 酶切后线性化的 Bo IL 2 - p PICZB电转化到巴斯德毕赤酵母X- 33中 ,转化子经高浓度 Zeocin抗性筛选鉴定后 ,用 1 %甲醇诱导目的蛋白表达。经 SDS- PAGE及 Western blotting检测 ,表明 Bo IL2在酵母中获得了胞内表达 ;通过金属螯合亲和层析 (MCAC)获得纯化的重组蛋白 ;培养小鼠CTL L 2细胞进行活性检测 ,证实所表达的重组 Bo IL展开更多
基金This work was supported by Grants from National High Technology Research and Development Program(No.2002AA2Z345B)and(No.2004AA2Z3803)of the Ministry of Science and Technology of China.
文摘To obtain human tissue inhibitor of metalloproteinase-2(TIMP-2)cDNA and the secretory expression of TIMP-2 gene in Pichia pastoris,we designed and synthesized a 618 base pairs artificial gene coding for the TIMP-2 with a computer-aided design method using a standard chemical synthesis technique,which was composed of frequently used codons in the highly expressed Pichia pastoris genes.Then the synthetic gene encoding TIMP-2 was checked by means of dideoxynucleotide sequencing.The verified gene of TIMP2 was cloned to the Escherichia coli-yeast shuttle vector of pPIC9 to construct a recombinant plasmid pPIC9-T2.The plasmid was transformed into GS115 cells of the methylotrophic yeast,Pichia pastoris by electroporation,and we got the expression cell through phenotype selection and induction with methanol.Separation,purification,and bioactivity analysis of the expressed products were performed.
文摘利用含有强启动子 PAOX1 和 α-因子信号肽序列的巴斯德毕赤酵母载体 p PICZαA,构建出含牛白细胞介素 2(Bo IL - 2 )基因的重组质粒 Bo IL 2 - p PICZαA。线性化的重组表达载体转化到巴斯德毕赤酵母 X- 33及 KM71H中 ,筛选Zeocin高抗性酵母菌株 ,甲醇诱导目的蛋白表达。经 SDS- PAGE和 Western blot检测表明 ,Bo IL- 2以融合蛋白形式在胞内表达 ,但没能分泌到胞外。通过 Bo IL- 2在巴斯德毕赤酵母中的表达 ,重点讨论了信号肽。
文摘将编码牛白细胞介素 - 2 (Bo IL2 )成熟肽的 c DNA克隆到巴斯德毕赤酵母 (Pichia pastoris)表达载体 p PICZB中 ,构建出含 Bo IL 2基因的重组质粒 Bo IL 2 - p PICZB。将经 Sac 酶切后线性化的 Bo IL 2 - p PICZB电转化到巴斯德毕赤酵母X- 33中 ,转化子经高浓度 Zeocin抗性筛选鉴定后 ,用 1 %甲醇诱导目的蛋白表达。经 SDS- PAGE及 Western blotting检测 ,表明 Bo IL2在酵母中获得了胞内表达 ;通过金属螯合亲和层析 (MCAC)获得纯化的重组蛋白 ;培养小鼠CTL L 2细胞进行活性检测 ,证实所表达的重组 Bo IL
