Fusion Expression on the Esat-6 and cfp-10 Genes of Mycobacterium bovis in Escherichia coli

Abstract:

Based on the (Gly4Ser)3 linker, the esat-6 and cfp-10 gene were fused for raising the antigenicity of single antigen. The DNA fragments of esat-6 and cfp-10 were fused by splicing by overlapping extension (SOE) polymerase chain reaction (PCR),and the fusion gene esat-6-cfp-10 were cloned into pMD18-T vector, and then we got the recombinant plasmid pMD-esat-6-cfp-10. pMD-esat-6-cfp-10 and pET28a (+) were digested by BamHI and EcoRI double enzymes. The purified mpb esat-6-cfp-10 fusion gene was subcloned into the expression vector pET28a (+),and the prokaryotic expression vector pET-esat-6-cfp-10 was constructed. Plasmid containing pET-esat-6-cfp-10 was transformed into competence Escherichia coli BL21(DE3).The bacterium was induced by isopropyl-β-D-thiogalactopyranoside (IPTG) and analyzed by sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE),approximately 25 kDa exogenous protein was observed on the SDS-PAGE. The protein was analyzed by using Western-blotting. The results indicated that the protein was of antigenic activity of Mycobacterium bovis. These results could serve as a basis for further studies on the usefulness of the fusion gene and its expression product in the development of DNA vaccine; living carrier vaccine; subunit vaccine and diagnostic reagents against bovine tuberculosis.

• Periodical: Applied Mechanics and Materials (Volume 421)
• Pages: 354-358
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.421.354
• Online since: September 2013
• Authors: Jia Ming Lin, Chun Fang Wang, Jia Ning Guan, Hong Xia Ma, Shuang Hou, Xin Liu, Xiu Yun Jiang
• Keywords: cfp-10 Gene, esat-6 Gene, Fusion Gene, Mycobacterium bovis, Prokaryotic Expression

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