Plasmid transfer in Streptococcus faecalis: Production of multiple sex pheromones by recipients

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Plasmid transfer in Streptococcus faecalis: production of multiple sex pheromones by recipients.

In a previous report (1978, Proc. Nat. Acad. Sci. USA 75, 3479-3483), we showed that recipient strains of Streptococcusfaecalis excrete a heat-stable substance (sex pheromone) which induces donor cells carrying certain conjugative plasmids to become adherent, generating the cell-to-cell contact necessary for plasmid transfer. Since donors themselves could be induced to aggregate or “clump” by r...

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Sex pheromones and plasmid transfer in Enterococcus faecalis.

Plasmid-free Enterococcus faecalis excrete peptides (sex pheromones) which specifically induce a mating response in strains harboring certain conjugative plasmids. The response is characterized by the synthesis of a "fuzzy" surface material, visible by electron microscopy, which is believed to facilitate the aggregation of donors and recipients. Transconjugants which receive a specific plasmid ...

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Sex pheromones and plasmid transfer in Streptococcus faecalis: a pheromone, cAM373, which is also excreted by Staphylococcus aureus.

Within a highly evolved mult icel lular organi sm, communicat ion between dis tally located ce l l s occurs by means o f a variety o f different chemica l s ignals . These hormonal substances play important roles in deve lopment , maintenance, and fertility and are a lso involved in coordinating immune and neurological responses to external st imuli . Chemical communicat ion can also occur betw...

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Isolation and structure of the bacterial sex pheromone, cAD1, that induces plasmid transfer in Streptococcus faecalis.

The Streptococcus faecalis sex pheromone cAD1, which is involved in the conjugative transfer of the hemolysin plasmid pAD1, has been isolated and its structure determined. Its Mr is 818 and its amino acid sequence is H-Leu-Phe-Ser-Leu-Val-Leu-Ala-Gly-OH. A replicate of the pheromone synthesized by the liquid-phase method showed the same biological activity and chromatographic behavior as the is...

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Conjugal transfer of plasmid-borne multiple antibiotic resistance in Streptococcus faecalis var. zymogenes.

A strain of Streptococcus faecalis var. zymogenes, designated JH1, had high-level resistance to the antibiotics streptomycin, kanamycin, neomycin, erythromycin, and tetracycline. These resistances were lost en bloc from approximately 0.1% of cells grown in nutrient broth at 45 C. The frequency of resistance loss was not increased by growth in the presence of the "curing" agents acriflavine or a...

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ژورنال

عنوان ژورنال: Plasmid

سال: 1979

ISSN: 0147-619X

DOI: 10.1016/0147-619x(79)90029-5