Table 1.

Examples of Bacterial Quorum Sensing Systems and their Controlled Social Traits

Microrganism	Major Signal Molecules	Regulatory System	Group-Derived Benefits	References
Bacillus subtlis	ComX CSF (PhrC) PhrA,-E, -F, -K, -H	ComP/ComA Rap proteins	Competence, sporulation, biofilm formation, antibiotic production,	[7–10,32]
Myxococcus xanthus	A-signal C-signal	SasSRN	Fruiting body formation or sporulation	[7–10]
Pseudomonas aeruginosa	3O-C12-HSL C4-HSL	LasI/LasR RhlI/RhlR OscR (orphan)	Structured biofilm formation, virulence factors	[7–10, 28–30]
Staphylococcus aureus	AIP-I, AIP-II, AIP-II, AIP-IV	AgrC/AgrA	Biofilm formation, virulence factors	[7–9,31]
Streptococcus mutans	CSP (ComC) XIP (ComS)	ComD/ComE ComR	Bacteriocins, biofilm formation, competence	[33–36]
Streptococcus pneumoniae	CSPs	ComD/ComE	Competence, fratricide, biofilm formation, virulence	[8,32]
Vibrio harveyi	HAI-1, CAI-1 AI-2	LuxLM/LuxN LuxP/LuxQ	Bioluminescence emission, symbiosis	[7–9,11,26]