麻疹病毒N蛋白原核表达纯化条件的优化
Optimization of measles virus N protein's prokaryotic expression and purification
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摘要: 通过构建重组表达质粒,诱导表达纯化麻疹病毒N蛋白.将麻疹病毒N蛋白基因片段与载体pET-32a(+)相连接,通过PCR方法扩增获得重组质粒pET-32a(+)/N,然后将重组质粒转入大肠杆菌E.coli BL21(DE3)内,并优化诱导表达时间、温度、诱导剂浓度等条件.SDS-PAGE和Western blot蛋白印迹检测表明,麻疹病毒N蛋白分子质量约为60 kD,表达产物用Ni-NTA亲和层析和DEAE纯化后,纯度达90%.Abstract: In order to construct a recombinant expression plasmid which induced express purification measles virus(MV) N protein, the recombinant plamised of pET-32 a(+)/N amplified by PCR from MV N protein genes was inserted into expression vector pET-32 a(+), then it was transformed into E. coli BL21(DE3). The condition of time, temperature and concentration of IPTG were optimized. The results of SDSPAGE and Western blot tests showed that MV N protein molecular was 60 kD. The protein's purity was 90% after being purified by Ni-NTA and DEAE.
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Key words:
- measles virus /
- N protein /
- prokaryotic expression /
- protein purification
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