Journal
FEMS MICROBIOLOGY LETTERS
Volume 269, Issue 2, Pages 289-294Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1574-6968.2007.00641.x
Keywords
conjugation; sex factor; pRS01; dissemination; Ll.LtrB; group II intron
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The low G+C Gram-positive bacterium Lactococcus lactis harbours two highly similar conjugative elements: an integrative and conjugative element called sex factor and the pRS01 plasmid. Originally, it was believed that the host range of the sex factor was limited to L. lactis subspecies. Here, it is reported that pTRK28 cointegrates of a spectinomycin-marked L. lactis sex factor and of the pRS01 conjugative plasmid can be transferred from L. lactis to Enterococcus faecalis. These results demonstrate the conjugative transfer of these elements to other bacterial species. Furthermore, it is reported that Ll.LtrB, a mobile group II intron carried by both elements, can invade its recognition site upon pRS01 conjugative transfer to E. faecalis.
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