Abstract：Foot-and-mouth disease virus (FMDV) VP1 gene was amplified by RT-PCR. The VP1 fragment was inserted into plasmid pMBX to obtain recombinant plasmid pMBX-VP1. The pMBX-VP1 was transformed into Escherichia coli BL-21(DE3) to induce VP1 gene fusion expression with 1 mmol/L Isopropylthio-β-D-galactoside (IPTG). The fusion protein band with molecular weight of 58 kD was visible on the SDS-PAGE gel. The density scanning showed that the largest amount of the fusion protein was 35.5% of total bacterial protein. The amounts of the soluble form of the fusion in supernatant of lysate was up to 31.2%, and 6.8% in sediment. Western blot result shawed that the expression products could specifically reacted with the antisera against FMDV. The soluble fusion protein was purified by 50%Ni-NTA affinity chromatography and used as an antigen, and FMDV antibody could be detected by ELISA method.
