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http://dx.doi.org/10.5352/JLS.2004.14.2.362

Construction and Characterization of the Vibrio parahaemolyticus Collagenase Inactivated Mutant  

이재원 (부산대학교 자연과학대학 미생물학과)
전인준 (부산대학교 자연과학대학 미생물학과)
강호영 (부산대학교 자연과학대학 미생물학과)
차재호 (부산대학교 자연과학대학 미생물학과)
Publication Information
Journal of Life Science / v.14, no.2, 2004 , pp. 362-367 More about this Journal
Abstract
For better understanding of the host infection mechanism of Vibrio, a Vibrio parahaemolyticus collagenase mutant was generated by insertional inactivation of a vppC gene encoding extracellular collagenase. A recombinant DNA containing vppC::nptII was cloned into a suicide plasmid pDMS197, resulted in pVCM03. The recombinant suicide plasmid pVCM03 contained in E. coli $\chi$7213 was transferred to a wild-type V. parahaemolyticus 04 through conjugation. The recombinant vppC::nptII DNA in pVCM03 was exchanged with wild-type allele by homologous recombination resulting vppC mutant, V. parahaemolyticus CM. The mutant was selected and screened on TCBS media containing 10% sucrose and kanamycin. The mutation by allele exchange was confirmed with the comparison of the size of DNAs amplified by PCR. V. parahaemolyticus CM showed at least 4-fold less collagen-degrading activity than those of wild-type, and the mutant exhibited less cytotoxicity than that of wild-type in MTT assay.
Keywords
V. parahaemolyticus; vppC; conjugation; allelic exchange;
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