[Cloning and sequence analysis of Trichomonas vaginalis ferredoxin gene].

OBJECTIVE: To construct a recombinant plasmid containing ferredoxin gene of Trichomonas vaginalis. METHODS: Total DNA was extracted from Trichomonas vaginalis with Chelex-100 method and used as templates for PCR. Primers were designed based on the published sequence of the ferredoxin gene and used to amplify the Trichomonas vaginalis gene using PCR method. The ferredoxin gene obtained by PCR technique was directionally cloned into plasmid pMD-18T simple vector. The constructed recombinant plasmid was transferred into E. coli JM109. The transformants were screened and identified by PCR and restriction analysis. The DNA sequence of the gene was determined by Sanger's method. RESULTS: The size of amplified ferredoxin gene was 306bp. The correct recombinant plasmid was isolated and confirmed by PCR and restriction analysis. The DNA sequence of cloned gene was the same as the published sequence. CONCLUSION: The ferredoxin gene was successfully amplified and cloned into plasmid pMD-18T simple vector. The cloned ferredoxin gene could be used to produce recombinant protein and for study of its function.