ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2014, Vol. 45 ›› Issue (9): 1561-1566.doi: 10.11843/j.issn.0366-6964.2014.09.026

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Prokaryotic Soluble Expression of Trunked N Protein of Porcine Epidemic Diarrhea Virus and Its Antigenic Activity

ZHU Wei-xia1,YUAN Wan-zhe1,LI Li-min1,SONG Qin-ye1*,SUN Tai-ran2,LI Tan-qing1   

  1. (1.Hebei Province Research Center of Veterinary Biologicals engineering and technology,College of Veterinary Medicine,Agricultural University of Hebei,Baoding 071000,China;2.The Center for Animal Disease Control and Prevention,Baoding 071001,China)
  • Received:2014-03-03 Online:2014-09-23 Published:2014-09-23

Abstract:

To express the porcine epidemic diarrhea virus (PEDV) N protein by prokaryotic expression system and to identify its antigenicity,truncated N protein (tN) genes were amplified by RT-PCR and recombinant prokaryotic expression plasmid (pET32a-PEDV-tN) with tN protein gene was constructed.After the recombinant plasmids had been transferred into competent cells of E.coli BL21 and the bacteria had been inducted by IPTG,the expression and immunoreactivity of tN protein were detected respectively by SDS-PAGE and Western blotting.Then,BLAB/c mice were subcutaneously immunized with purified tN protein and the protein immunogenicity was detected by ELSIA and Immunoperoxidase monolayer assay.The tN protein genes of 705 bp were amplified and the recombinant plasmids carrying this gene could solubly express recombinant tN protein under induction of IPTG in E.coli BL21.The protein displayed specific binding to swine anti-PEDV antibody and induced mice to produce anti-PEDV antibody.These results showed that the soluble expression of PEDV tN protein with favorable complete antigenic activities was implemented by prokaryotic expression system.

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