Bacteria are able to sense an increase in population density and can respond to it by coordinated regulation of the expression of certain sets of genes in the total population of bacteria. This specific mode of regulation is known as Quorum Sensing (QS). The QS systems include low-molecular-weight signaling molecules of different chemical nature and the regulatory proteins that interact with the signaling molecules. The QS systems are global regulators of bacterial gene expression. They play an important role in controlling metabolic processes in bacteria. This review describes QS systems in members of the bacterial family Enterobacteriaceae functioning with the involvement of various signaling molecules, including N-acyl-homoserine lactones, AI-2, AI-3, peptides, and indole. The differences of the QS system in these bacteria from those in other taxonomic groups of bacteria are discussed. Data on the role of different types of QS systems in the regulation of different cellular processes in bacteria, i.e., their virulence, the synthesis of enzymes and antibiotics, biofilm formation, apoptosis, etc. are presented.
Russian Journal of Genetics – Springer Journals
Published: May 3, 2014
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