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مشاهدة النسخة كاملة : Sex-Pheromone System and Plasmid Transfer in Enterococcus feacalis


ماجد78
2015-12-10, 08:16 PM
Sex-Pheromone System and Plasmid Transfer in Enterococcus feacalis

Jawad Kadhum Tarrad Al-Khafaji
Dept. of Microbiology, College of Medicine, University of Babylon, Hilla, Iraq.

Abstract
Pheromone-inducible plasmid transfer is an important mechanism for dissemination of antibiotic resistance and virulence factors in these organisms. Plasmid-free strains of Enterococcus faecalis secrete at least half a dozen peptide sex pheromone-probably many more-that induce a mating response by potential donor strains carrying members of specific families of conjugative plasmids. The response is associated with synthesis of surface proteins that facilitates formation of donor-recipient mating aggregates. When a recipient acquires a given plasmid , the corresponding pheromone becomes shutdown or masked. Although the structure of at least five of these peptides has been determined.

Sex-Pheromone System and Plasmid Transfer in Enterococcus feacalis / كلية 2 (http://medicine.uobabylon.edu.iq/service_showarticle.aspx?pubid=4018)