Expression and purification of nucleocapsid protein of MERS coronavirus in E.coli

VernacularTitle:MERS冠状病毒核衣壳蛋白原核表达和纯化
Author: Yangbo FU ; Yong HU ; Chengcheng HUANG ; Yuanyuan BAI ; Lihong QIU ; Cheng CAO ; Ting GAO
Publication Type:Journal Article
Keywords: coronavirus; MERS-CoV N; prokaryotic expression and purification; cation exchange chromatography
From: Military Medical Sciences 2015;39(12):919-922
CountryChina
Language:Chinese
Abstract: Objective To construct a prokaryotic expression vector pET-22b+with Middle East respiratory syndrome ( MERS) coronavirus nuclocapsid protein( NP) gene and to express and purify N protein.Methods N gene amplified by PCR was inserted into the prokaryotic expression vector pET-22b+.Recombinant plasmid was confirmed using DNA elec-trophoresis and sequencing.NP was expressed in E.coli BL21(DE3) by IPTG induced and purified by cation exchange chromatography using the AKTA purification system.Results The NP gene sequence was proved to be correct by sequen-cing and the protein was expressed in both soluble and insoluble forms in E.coli BL21 ( DE3 ) after IPTG induction.The purity and concentration of recombinant protein was improved obviously by cation exchange chromatography and enrich-ment.Conclusion Recombiant NP of high purity and concentration is purified and will facilitate NP functional research.