Table 1.

Quorum-sensing (QS) systems of selected Gram-negative bacteria.

SL No.	Bacterial Organism Name	Quorum-Sensing Molecules	Genes	Receptors	References
1.	Chromobacterium violaceum	C12-HSL	N.A.	N.A.	[34]
		N.A.	N.A.	SdiA	[35]
		AI-2	LuxS	LsrB	[16,36]
2.	Pseudomonas aeruginosa	C4-HSL	RhlI	RhlR	[37]
		3-oxo-C12-HSL	LasI	LasR	[38,39]
		3-oxo-C12-HSL	NA	QscR	[3,40]
		PQS, HHQ	PqsABCD, PqsH	PqsR	[41]
3.	Staphylococcus aureus	3-hydroxy-C4-HSL	LuxM	LuxN	[3,40]
		AI-2	LuxS	LuxP	[42]
		CAI-1	CqsA	CqsS	[43]
4.	Acinetobacter baumannii	3-hydroxy-C12-HSL	AbaI	AbaR	[44]
5.	Escherichia coli	3-oxo-C8-HSL	N.A.	SdiA	[27,35]
		AI-2	LuxS	LsrB	[37,45,46]
		AI-3/Epinephrine/Norepinephrine	N.A.	QseC	[47]
6.	Klebsiella pneumoniae	C8-HSL	N.A.	N.A.	[15,36]
		C12-HSL	N.A.	N.A.	[27]
		AI-2	LuxS	LsrB	[48,49]