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Gene disruption in Salmonella typhimurim by modified λ Red disruption system | ||
| Iranian Journal of Veterinary Research | ||
| مقاله 12، دوره 16، شماره 3 - شماره پیاپی 52، 2015، صفحه 301-305 اصل مقاله (497.07 K) | ||
| نوع مقاله: Short paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijvr.2015.3200 | ||
| نویسندگان | ||
| A. Ahani Azari1؛ T. Zahraei Salehi* 1؛ B. Nayeri Fasaei1؛ M. Alebouyeh2 | ||
| 1Department of Microbiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran | ||
| 2Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran | ||
| چکیده | ||
| There are many techniques to knock out directed genes in bacteria, some of which have been described in Salmonella species. In this study, a combination of SOEing PCR method and the λ Red disruption system were used to disrupt phoP gene in wild type and standard strains of Salmonella typhimurium. Three standards PCR and one fusion PCR reactions were performed to construct a linear DNA including upstream and downstream of phoP gene and Kanamycin cassette. As a template plasmid, we used pKD4 which carries kanamycin gene flanked by FRT (FLP recognition target) sites. The resulting construct was electroporated into prepared competent cells of S. typhimurium. The transformants colonies related to the standard strain appeared on the LB-Km-agar plates after incubation, but there was no colony on LB-Km-agar plates corresponding to the wild type strain. The failure in transformation of the wild type strain may be because of inflexibility of the λ Red disruption system in this strain or its unique restriction-modification system. However, by this construct we are able to generate phoP mutant in many of the Salmonella species due to high homology of the phoP gene which exists in different species. | ||
| کلیدواژهها | ||
| Gene disruption؛ Kanamycin cassette؛ λ Red disruption system؛ Salmonella typhimurium؛ SOEing PCR method | ||
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