Abstract
Quorum sensing, a cell-density-dependent regulatory system, which controls aggressive phenotype to other organism such as bacteriocin biosynthesis or virulence expression, is an efficient strategy for a certain species of bacteria to survive in nature of complex ecosystem. In this review, general aspect of quorum sensing is introduced and then peptide pheromone-mediated quorum sensing of Gram-positive bacteria focussing on the regulation of bacteriocin biosynthesis in lactic acid bacteria and control of virulence expression in staphylococci is reviewed.
