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Position: Home > Articles > Optimization of Expression Conditions for Listeria monocytogenes p60 Protein FOOD SCIENCE 2010,31 (23) 160-163

单核细胞增多性李斯特菌p60蛋白表达条件的优化

作  者:
吕添;曹正茂;武海涛;王小红
单  位:
华中农业大学食品科学技术学院
关键词:
单核细胞增多性李斯特菌;p60蛋白;表达条件;优化
摘  要:
在成功构建重组表达载体pET-28a-p60和获得重组宿主菌E.coliBL21(DE3)的基础上,对重组宿主菌E.coliBL21(DE3)进行表达p60蛋白条件的优化研究。结果表明:将重组大肠杆菌培养至OD600nm达0.7~0.8左右时,加入浓度为1mmol/L的异丙基-β-D-硫代吡喃半乳糖苷(IPTG),在摇床温度为25℃,转速为150r/min条件下诱导表达6h,可得到重组表达的p60蛋白占总蛋白的比例为42.32%,其中可溶性蛋白占总p60蛋白的比例为85.36%左右,为p60蛋白诱导表达的最优条件。
译  名:
Optimization of Expression Conditions for Listeria monocytogenes p60 Protein
作  者:
LU Tian,CAO Zheng-mao,WU Hai-tao,WANG Xiao-hong (College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China)
关键词:
Listeria monocytogenes;p60 protein;expression condition;optimization
摘  要:
In this study, the optimal conditions for the expression of Listeria monocytogenes p60 protein, for which the recombinant expression vector pET-28a-p60 and the recombinant E. coli BL21(DE3) host strain were available, were investigated. The results showed that the optimal expression process determined was that the host strain was enriched to a OD600nm value between 0.7 and 0.8, and IPTG was then added to a final concentration of 1 mmol/L, followed by 6 h expression on a shake table with a shaking speed of 150 r/min at 25 ℃, and that after the expression, the content of p60 protein as a percentage of total protein content was 42.32%, and soluble protein occupied around 85.36% of the total p60 protein.

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