摘要
目的 :优化重组人单核细胞趋化蛋白 - 1(rhu MCP- 1)在大肠杆菌 DE3中的表达 ,生产 rhu MCP- 1。 方法 :应用 NBS15 L T.DR发酵罐 ,研究了诱导时不同的 p H值、温度、搅拌速率、通气量和异丙基硫代半乳糖苷 (IPTG)浓度对表达的影响 ,并利用正交设计对发酵条件进行优化。 结果 :正交试验表明溶氧条件对 rhu MCP- 1表达水平的影响较显著 ,其中搅拌速率和通气量为最大的影响因素 ,搅拌速率为 30 0 r/ m in和通气量 10 L / min时 ,表达水平最高 ,重组蛋白的含量可达 40 %以上。 结论 :本实验为该工程菌的中试提供了最佳的表达诱导条件 。
Objective: To optimize the expression of recombinant human monocyte chemoattractant protein (rhuMCP-1) in E.coli DE3. Methods:With NBS-MICROS 15 L T.DR fermentor, pGEX-IN/huMCP-1 was constructed by our laboratory. Four parameters including pH,temperature,agitation rate and concentration of IPTG were studied by orthogonal experimental design. Results: It was found that the expression level was greatly affected by the amount of dissolved oxygen. This indicated that the agitation rate and ventilation amount were the most important parameters during fermentation. Examined by SDS-PAGE and gel scanning, the expression level of total protein was over 40% when agitation rate was 300 r/min and ventilation amount was 10 L/min. Conclusion: A method for high-level expression of huMCP-1 on pilot-scale is established, and it will be useful for large-scale industrial production of target protein.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
2001年第9期830-832,共3页
Academic Journal of Second Military Medical University
基金
国家自然科学基因资助项目 ( 39770 6 89)
关键词
单核细胞趋化蛋白-1
重组融合蛋白质类
大肠杆菌
正交设计试验
基因表达
monocyte chemoattractant protein 1(MCP-1)
recombinant fusion proteins
Escherichia coli
orthogonal experimental design
gene expression
