摘要
通过反转录PCR法成功地扩增出日本曲霉β-呋喃果糖苷酶基因,基因片断长度为1 917bp,编码638个氨基酸。将所得片断定向克隆到pYX212载体上,并转化至酿酒酵母中,通过酵母菌落PCR检验后,确定该基因在酿酒酵母中获得表达,转化子平均酶活为26.4 U/mg。
A β-fructofuranosidase gene of 1 917 bp was cloned from Aspergillus japonicus, and the ORF sequence predicted a protein of 638 amino acids. A expression plasmid pYX212 carrying the gene was under the control of the triose phosphate isomerase gene (TPI) promotor was transformed into Saccharomyces cerevisiae W303-1A, and β-fructofuranosidase gene was successfully expressed in the recombinant strains. The enzyme activity was about 26.4 U/mgo
出处
《食品与生物技术学报》
CAS
CSCD
北大核心
2007年第2期62-66,共5页
Journal of Food Science and Biotechnology
基金
国家自然科学基金项目(30471155)