MMP9-PEX的原核表达、纯化与复性研究 |
| |
引用本文: | 张伟静,张绍峰,唐红卫,李锦毅.MMP9-PEX的原核表达、纯化与复性研究[J].国外医学:分子生物学分册,2010(6):504-507,512. |
| |
作者姓名: | 张伟静 张绍峰 唐红卫 李锦毅 |
| |
作者单位: | [1]辽宁医学院研究生院,辽宁省锦州市121001 [2]武警总医院,北京市100039 |
| |
基金项目: | 国家自然科学基金(No.30672771) |
| |
摘 要: | 目的 对人基质蛋白酶9(matrix metalloproteinase,MMP9)C端血红素结合蛋白样结构域(hemopexin domain,PEX)的原核表达条件、透析复性条件进行优化,以获得高表达的活性蛋白.方法 将构建好的原核表达载体PET-his-MMP9-PEX转化至大肠埃希菌菌株BL21(DE-3),异丙基β-D硫代半乳糖苷(IPTG)诱导后产生包涵体蛋白,探讨不同IPTG浓度、不同诱导时间、不同菌液密度值对目的 蛋白表达产量的影响;盐酸胍裂解包涵体,采用NI-NTA进行纯化,对纯化蛋白的透析复性条件进行优化;采用明胶酶谱的方法检测MMP9-PEX的活性.结果 经纯化透析复性后蛋白的纯度在95%以上,复性回收率为36.86%.结论 本研究优化了MMP9-PEX的原核表达、透析复性条件,获得了有活性的MMP9-PEX蛋白,为进一步研究MMP9-PEX的功能提供了实验基础.
|
关 键 词: | 血红素蛋白样结构域 原核表达 纯化 复性 |
Prokaryotic Expression and Purification and Renaturation of MMP9-PEX |
| |
Authors: | ZHANG Weijing ZHANG Shaofeng TANG Hongwei LI Jinyi |
| |
Institution: | 1 Graduate School, Liaoning Medical College, Jinzhou, Liaoning, 121000, China 2 The General Hospital of Chinese People's Armed Police Forces, Belting, 100039, China) |
| |
Abstract: | Objective To optimize conditions for prokaryotic expression, purification and renaturation of human carboxyl-terminal hemopexin domain (PEX) of matrix metalloproteinase (MMP9) . Methods The expression vector, PET-his-MMP9-PEX, was transformed into E. coli BI21 (DE3) under IPTG induction. Expression level of PEX was examined in various culture conditions, including IPTG concentration, induced time, OD values of bacilli-solution and renatured conditions with various dialysis. Cytoplasmic inclusions were cleaved by guanidine hydroehloride. The recombinant protein was purified by affinity chromatography. Enzymatic activity of MMP-9-PEX was detected by gelatin zymography. Results The purity of renatured MMP-9-PEX protein was a- bove 95% , with36. 86% of renaturation rate. Conclusion The conditions for prokaryotic expression, purification and renaturation of functional human MMPg-PEX were optimized, providing experimental basis for further study of MMP9-PEX function. |
| |
Keywords: | hemopexin domain prokaryotic expression purification renaturation |
本文献已被 维普 等数据库收录! |
|