摘要
采用RT-PCR技术,从黑曲霉的菌丝体RNA中扩增出葡萄糖淀粉酶GAI的结构基因,将其连接到pPICZαA载体中,转入巴斯德毕赤酵母GS115中,获得8株重组酵母;甲醇诱导目的蛋白分泌表达,葡萄糖淀粉酶酶活最高达174U/mL,占上清液蛋白的36%。
Amplified gene of Glucoamylase Ⅰ from total RNA of Aspergillus niger mycelium by RT-PCR technology, inserted it into pPICZαA vector.Then we transformed the recombinant plasim into Pichia pastoris GSll5 by electroporation, and got 8 recombinant strains. The activity of Glucoamylase Ⅰ was maximum 174U/mL in BMMY medium by methanol induction. Glucoamylase Ⅰ account for 36% of total protein in media supernate. Effect of multiple copies and prefer codon on efficiency of secretory expression was also discussied in detail.
出处
《黑龙江八一农垦大学学报》
2005年第4期69-72,共4页
journal of heilongjiang bayi agricultural university
关键词
黑曲霉
葡萄糖淀粉酶
毕赤酵母
分泌表达
Aspergillus niger
Glucoamylase
Pichia pastoris
secretory expression