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丝瓜ACC合成酶的原核表达、分离纯化及性质鉴定
引用本文:高波,曾庆银,陆海,付学奇.丝瓜ACC合成酶的原核表达、分离纯化及性质鉴定[J].吉林大学学报(理学版),2004,42(4):622-624.
作者姓名:高波  曾庆银  陆海  付学奇
作者单位:吉林大学生命科学学院药学系,长春,130023;北京林业大学生物科学与技术学院,北京,100083
基金项目:吉林大学创新基金(批准号:403010123054).
摘    要:将构建成功的丝瓜ACC合成酶cDNA的重组质粒, 转化为大肠杆菌BL21(DE3), 经异丙基硫代半乳糖苷(IPTG)诱导后得到特异性高效表达, 表达蛋白以包涵体形式存在. 包涵体经洗涤和Zn2+螯合柱层析, 得到纯化蛋白. SDS-PAGE显示纯化蛋白分子量为55 000的单一蛋白带. 经活性分析, 该酶最适pH值为8.5, 米氏常数(Km)为44.2 μmol/L.

关 键 词:丝瓜ACC合成酶  包涵体  蛋白质纯化
文章编号:1671-5489(2004)04-0622-03
收稿时间:2003-12-22
修稿时间:2003年12月22

Prokaryotic expression, purification and activity measurement of towel gourd ACC synthase
GAO Bo,ZENG Qing-yin,LU Hai,FU Xue-qi.Prokaryotic expression, purification and activity measurement of towel gourd ACC synthase[J].Journal of Jilin University: Sci Ed,2004,42(4):622-624.
Authors:GAO Bo  ZENG Qing-yin  LU Hai  FU Xue-qi
Institution:1. Department of Pharmacy, College of Life Science, Jilin University, Changchun 130023, China; 2. School of Biological Science and Biotechnology, Beijing Forestry University, Beijing 100083, China
Abstract:The recombinant plasmid containing towel gourd ACC synthase cDNA was successfully transformed into Escherichia coli BL21(DE3) and the ACC synthase expression was significantly induced by IPTG. The expressed protein exists in the form of inclusion bodies. The towel gourd ACC synthase was purified by abstersion and chromatography. SDS-PAGE analysis of the purified protein showed only one band with molecular mass of 55 000. The optimum pH of the expressed towel gourd ACC synthase reaction is 8.5 and the Km values of enzyme is 44 .2 μmol/L at pH 8.5.
Keywords:towel gourd ACC synthase  inclusion bodies  protein purification
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