›› 2019, Vol. 31 ›› Issue (11): 1819-1824.DOI: 10.3969/j.issn.1004-1524.2019.11.07

• Animal Science • Previous Articles     Next Articles

Prokaryotic expression of Core protein of bovine viral diarrhoea viruses and preparation of polyclonal antibodies

ZHANG Kang1, ZHANG Xuan2, YAN Zunxiang1, WANG Lei1, ZHANG Kai1, ZHANG Jingyan1, LUO Yongjiang1, QIU Zhengying1, XUE Huan3, LI Jianxi1,*   

  1. 1. Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Drug Innovation of Ministry of Agriculture and Rural Affairs, Lanzhou Institute of Husbandry and Pharmaceutical Sciences of CAAS, Lanzhou 730050, China;
    2. College of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    3. School of Basic Medical Science, Xi'an Jiaotong University, Xi'an 710061, China
  • Received:2019-04-20 Online:2019-11-25 Published:2019-12-04

Abstract: In order to obtain the Core protein of bovine viral diarrhea virus (BVDV) and its polyclonal antibody, a pair of specific primers was designed and synthesized according to the coding sequence of the Core protein, and the BVDV Core gene was amplified by RT-PCR and inserted into the Pet30a vector. The recombinant plasmid Pet30a-Core was constructed and transformed into Escherichia coli TOP 10 competent cells by enzyme digestion. The positive recombinant bacteria were screened and the recombinant Core protein with molecular mass of 20 ku was induced to express with IPTG. The protein was purified by Ni column affinity method of the fusion protein, and the polyclonal antibody was prepared by immunizing New Zealand white rabbit with the purified recombinant protein, and the polyclonal antibody titer was determined by indirect ELISA to reach 1∶512 000. Western blot and indirect immunofluorescence assay (IFA) confirmed that polyclonal antibodies reacted with BVDV antigens in cells and had good immunogenicity and specificity. The rabbit polyclonal antibody against BVDV recombinant Core protein was successfully prepared, which laid a foundation for the detection of BVDV and the study of Core protein function.

Key words: bovine viral diarrhoea viruses (BVDV), Core protein, expression, polyclonal antibodies

CLC Number: