›› 2015, Vol. 42 ›› Issue (2): 358-364.doi: 10.16431/j.cnki.1671-7236.2015.02.019

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Preparation of Monoclonal Antibody and Preliminary Identification of Antigenic Epitope of NSP8 Protein in Porcine Transmissible Gastroenteritis Virus

DONG Hui1, ZHANG Xin2, CHEN Jian-fei2, SHI Hong-yan2, SHI Da2, CHANG Tie-cheng3, GU Feng-li2,4, XU Tian2, WANG Zhi-qin5, LIU Ming-chun1, FENG Li2   

  1. 1. College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110161, China;
    2. Division of Swine Infectious Disease, State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Harbin 150001, China;
    3. College of Animal Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
    4. College of Life Science, Northeast Agricultural University, Harbin 150030, China;
    5. College of Basic Medical, Capital Medical University, Beijing 100069, China
  • Received:2014-09-12 Online:2015-02-20 Published:2015-02-13

Abstract: To identify the epitope of porcine transmissible gastroenteritis virus (TGEV),the NSP8 gene was cloned into the vector pGEX-6P-1 for expression in E.coli.BALB/c mice of 6 week-old were immunized with the recombinant NSP8 protein.Then the monoclonal antibody against NSP8 protein was prepared by lymphocyte hybridoma technique.The monoclonal antibody belonged to IgG1 subtype with κ chain.The titers in cell culture medium of the hybidomas was 1:3 200.Western blotting assay showed that the monoclonal antibody was able to recognize the recombinant NSP8 protein.Epitope on NSP8 protein was identified by truncated expression and the linear epitope of 31SPQILKQLTKAFNIAKSDFEREASV55 was identified by Western blotting with the monoclonal antibody.This monoclonal antibody and its epitope mapping provided a basis for further study of the function of the TGEV NSP8.

Key words: porcine transmissible gastroenteritis virus; NSP8 gene; monoclonal antibody; antigenic epitope

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