酿酒酵母组成型表达甜叶菊糖基转移酶UGT76G1及相关性质研究
首发时间:2014-11-03
摘要:本研究将酿酒酵母穿梭质粒pESC-Leu的诱导型启动子GAL1和GAL10分别替换为PGK1和TEF1启动子,构建了组成型双启动子表达载体pESCD,再将甜叶菊糖基转移酶UGT76G1的编码基因亚克隆到pESCD的Sal I和Xho I酶切位点之间,构建了组成型表达UGT76G1的重组质粒pESCD-UGT。将pESCD-UGT转化到酿酒酵母YPH499中进行表达,结果确定该重组酵母在SD-L液体培养基培养24 h达到稳定期,菌体培养8 h蛋白表达量高,选用1%的甲苯作为重组菌全细胞催化的通透剂时,催化15 h产生288 mg/L的莱鲍迪甙A,其产量是对照组的5倍。
关键词: 组成型启动子 糖基转移酶UGT76G1 全细胞催化 莱鲍迪甙A
For information in English, please click here
Constitutive expression and characteristics of glycosyltransferase UGT76G1 in Saccharomyces cerevisiae
Abstract:In this study ,we use shuttle plasmid of Saccharomyces cerevisiae .Firstly, we designed and constructed a new expression vector pESC-LeuD which contain the two constitutive promoters, PGK1 and TEF1, to replace the original induced GAL1 / GAL10 promoter. The synthetic glycosyltransferase UGT76G1 coding gene was inserted into the restriction site of Sal I and Xho I of the expression vector pESCD to construct the recombinant plasmid pESCD-UGT, which was then transformed into the Saccharomyces cerevisiae strain YPH499.Results: confirmed the recombinant grow 24 h to stable phase and culture 8 h can express high quantity protein in SD-L. When chosse 1% methylbenzence as the recombinant whole-cell permeating agent, catalytic 15 h could produce 288 mg/L RA.It is 5 times of control group.
Keywords: Constitutive promoters Glycosyl transferase UGT76G1 Whole-cell catalysis Rebaudioside A
基金:
论文图表:
引用
No.4614356975047141****
同行评议
共计0人参与
勘误表
酿酒酵母组成型表达甜叶菊糖基转移酶UGT76G1及相关性质研究
评论
全部评论0/1000