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Position: Home > Articles > Cloning and Prokaryotic Expression of Nucleocapsid Protein Gene of Transmissible Gastroenteritis Virus SC-Y Strain Journal of Sichuan Agricultural University 2006,24 (2) 210-213

猪传染性胃肠炎病毒SC-Y株N基因的克隆及原核表达

作  者:
宋振辉;郭万柱;韩国全;骆爱芳
单  位:
四川农业大学动物生物技术中心
关键词:
猪传染性胃肠炎病毒;SC-Y株;N基因;克隆;原核表达
摘  要:
通过PCR方法扩增猪传染性胃肠炎病毒SC-Y株核衣壳蛋白(N)基因,然后将重组到pMD18-T载体中的约1174 bp的基因片段亚克隆到PET-32a(+)表达载体上,通过酶切及PCR鉴定阳性的重组质粒命名为PET-N,核苷酸及推导的氨基酸序列分析表明,该基因与其他猪传染性胃肠炎病毒相应基因具有很高的同源性,将阳性重组质粒转化BL21(DE3),经IPTG诱导可表达分子量约66 kD的融合蛋白,N基因的表达可为传染性胃肠炎病毒的诊断提供良好的物质材料。
译  名:
Cloning and Prokaryotic Expression of Nucleocapsid Protein Gene of Transmissible Gastroenteritis Virus SC-Y Strain
作  者:
SONG Zhen-hui,GUO Wan-zhu,HAN Guo-quan,LUO Ai-fang (Animal Biology Technology Center,Sichuan Agricultural University,Yaan 625014, Sichuan,China)
关键词:
transmissible gastroenteritis virus;SC-Y strain;N gene;cloning;prokaryotic expression
摘  要:
The nucleocapsid protein gene of transmissible gastroenteritis virus SC-Y strain was amplified by reverse transcription-polymerase chain reaction(RT-PCR).The recombinated fragment in pMD18-T was subcloned into the prokaryotic expression vector PET-32a(+).The recombinant expression vector that contained the target fragment was identified by using restriction endonucleases and named as PET-N.The nucleotide and deduced amino acid sequences of the cloned N gene from ransmissible gastroenteritis virus SC-Y strain were analyzed.The results show that the gene has a relatively high homology with the corresponding gene from other transmissible gastroenteritis virus strains.The recombinant plasmid is transformed into BL21 and the recombinant bacteria is induced by IPTG.SDS-PAGE are performed to detect the N fusion protein.Result indicates the molecular weight of N fusion protein is 66?kD.The expression of N protein is to provide a basis for the research on diagnosis of TGEV.biological functions.The constucton of recombinant N gene.

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