Fig. 1: Diversity of autoinducer molecules produced by marine representatives.
From: A review of quorum-sensing and its role in mediating interkingdom interactions in the ocean
The acylated homoserine lactone (AHL) family of QS signals with representatives including 3-oxo-C4-HSL (N-3-oxo-butyryl-L-homoserine lactone), C6-HSL (N-hexanoyl-DL-homoserine lactone), 3-OH-C14-HSL (N-3-hydroxytetradecanoylhomoserine lactone). p-Coumaroyl-homoserine lactone (p-coumaroyl-HSL) is a representative aryl-HSL in which the acyl side chain is replaced with p-coumaric acid moiety. The cholera autoinducer-1 (CAI-1, (S)-3-hydroxytridecan-4-one) family is produced only in Vibrio species. The autoinducer-2 (AI-2) family containing furanosyl-borate diester. The alkylquinolone family of QS signals including 2-heptyl-4-quinolone (HHQ). Finally, the QS-adjacent representatives including tropodithietic acid (TDA) and the viral peptide arbitrium encoded by the phage phi3T which infects Bacillus subtilis.
