Conjugal mobilization of streptococcal plasmid pMV158 between strains of Lactococcus lactis subsp. lactis. 1990

D van der Lelie, and H A Wösten, and S Bron, and L Oskam, and G Venema
Department of Genetics, University of Groningen, Haren, The Netherlands.

pMV158, a non-self-transmissible plasmid encoding tetracycline resistance, was conjugally transferred from Enterococcus faecalis JH203 to Lactococcus lactis subsp. lactis IL1403. This transfer appeared to be dependent on the cotransfer of the conjugative plasmids pAM beta 1 or pIP501. Intraspecies conjugal transfer of pMV158 also occurred in strain IL1403. In contrast to the transfer from E. faecalis, transfer in IL1403 did not require the presence of a conjugative plasmid in the donor strain but, rather, appeared to be dependent on putative chromosomal functions in strain IL1403. The transfer of pMV158 from strain IL1403 required the presence of an active pMV158-encoded protein, which showed homology to the Pre (plasmid recombination enzyme) proteins encoded by several small plasmids extracted from Staphylococcus aureus, such as pT181.

UI MeSH Term Description Entries
D010957 Plasmids Extrachromosomal, usually CIRCULAR DNA molecules that are self-replicating and transferable from one organism to another. They are found in a variety of bacterial, archaeal, fungal, algal, and plant species. They are used in GENETIC ENGINEERING as CLONING VECTORS. Episomes,Episome,Plasmid
D003227 Conjugation, Genetic A parasexual process in BACTERIA; ALGAE; FUNGI; and ciliate EUKARYOTA for achieving exchange of chromosome material during fusion of two cells. In bacteria, this is a uni-directional transfer of genetic material; in protozoa it is a bi-directional exchange. In algae and fungi, it is a form of sexual reproduction, with the union of male and female gametes. Bacterial Conjugation,Conjugation, Bacterial,Genetic Conjugation
D013293 Enterococcus faecalis A species of gram-positive, coccoid bacteria commonly isolated from clinical specimens and the human intestinal tract. Most strains are nonhemolytic. Streptococcus Group D,Streptococcus faecalis
D013294 Lactococcus lactis A non-pathogenic species of LACTOCOCCUS found in DAIRY PRODUCTS and responsible for the souring of MILK and the production of LACTIC ACID. Streptococcus lactis,Lactococcus lactis subsp. lactis

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