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Mol Gen Genet. 1997 Sep;256(1):84-7.

Single-step conjugative cloning of bacterial gene fusions involved in microbe-host interactions.

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  • 1Department of Plant Sciences, University of Oxford, UK. prainey@worf.molbiol.ox.ac.uk


In vivo expression technology (IVET) is a genetic strategy for isolating genes expressed in vivo. In order to full exploit this technology, it is necessary to analyse large numbers of IVET-generated gene fusions, which must be recovered from the chromosome of host bacteria. In bacteria for which transductional methods are not available, the recovery of integrated fusion plasmids is problematic and currently limits broad application of IVET. We describe a rapid, single-step, triparental conjugative approach for recovering chromosomally integrated fusion plasmids from both Pseudomonas fluorescens and Salmonella typhimurium. This simple and broadly applicable conjugative cloning system extends the utility of the IVET approach to clinically and agronomically relevant microbes and may be employed to recover non-replicating and integrated plasmids in other systems.

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