High efficiency generalized transduction in Escherichia coli O157:H7
UMass Chan AffiliationsDepartment of Microbiology and Physiological Systems
Department of Biochemistry and Molecular Pharmacology
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AbstractGenetic manipulation in enterohemorrhagic E. coli O157:H7 is currently restricted to recombineering, a method that utilizes the recombination system of bacteriophage lambda, to introduce gene replacements and base changes inter alia into the genome. Bacteriophage 933W is a prophage in E. coli O157:H7 strain EDL933, which encodes the genes ( stx2AB) for the production of Shiga toxin which is the basis for the potentially fatal Hemolytic Uremic Syndrome in infected humans. We replaced the stx2AB genes with a kanamycin cassette using recombineering. After induction of the prophage by ultra-violet light, we found that bacteriophage lysates were capable of transducing to wildtype, point mutations in the lactose, arabinose and maltose genes. The lysates could also transduce tetracycline resistant cassettes. Bacteriophage 933W is also efficient at transducing markers in E. coli K-12. Co-transduction experiments indicated that the maximal amount of transferred DNA was likely the size of the bacteriophage genome, 61 kB. All tested transductants, in both E. coli K-12 and O157:H7, were kanamycin-sensitive indicating that the transducing particles contained host DNA.
SourceMarinus MG, Poteete AR. High efficiency generalized transduction in Escherichia coli O157:H7. F1000Res. 2013 Jan 10;2. doi:10.12688/f1000research.2-7.v1. Link to article on publisher's website
Permanent Link to this Itemhttp://hdl.handle.net/20.500.14038/30052
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RightsCopyright 2013 Marinus MG et al. This is an open access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Data associated with the article are available under the terms of the Creative Commons Zero "No rights reserved" data waiver (CC0 1.0 Public domain dedication).