[Cloning, expression and bioinformatics analysis of cyclophilin of Echinococcus granulosus].

OBJECTIVE:To clone and express EgCyP gene of Echinococcus granulosas and analyze EgCyP using bioinformatics. METHODS:Total RNAS of adult E. granulosus was extracted and reversedly transcripted to cDNA. EgCyP gene was amplified from cDNA and inserted into vector pET28a. Recombinant plasmid pET28a-EgCyP was transformed into E. coli BL21 (DE3) for expression under the induction of IPTG. The expressed product was identified by SDS-PAGE and Western blotting. EgCyP was analyzed by the bioinformatics software. RESULTS:The EgCyP gene was successfully amplified from cDNA of adult E. granulosus and a fusion protein was expressed in E .coli BL21 (DE3). The molecular weight of the expressed protein was about 22 kDa. The Western blotting indicated that the antigenicity of the protein was specific. The bioinformatics analysis revealed that there were 7 antigen epitopes in EgCyP. CONCLUSION:EgCyP of E. granulosus is cloned and expressed in E. coli BL21 (DE3) successfully, which might be the foundation for the further study of its immunogenicity.