N-3-hydroxybutyryl-L-Homoserine lactone is an N-acyl-homoserine lactone produced by the bacterium V. splendidus and has been found in sequencing batch biofilm reactors used in wastewater treatment.1,2 It is the racemic version of the V. harveyi autoinducer N-((R)-3-hydroxybutanoyl)-L-homoserine lactone.3 |1. Purohit, A.A., Johansen, J.A., Hansen, H., et al. Presence of acyl-homoserine lactones in 57 members of the Vibrionaceae family. J. Appl. Microbiol. 115(3), 835-847 (2013).|2. Feng, Z., Sun, Y., Li, T., et al. Operational pattern affects nitritation, microbial community and quorum sensing in nitrifying wastewater treatment systems. Sci. Total Environ. 677, 456-465 (2019).|3. Ke, X., Miller, L.C., and Bassler, B.L. Determinants governing ligand specificity of the Vibrio harveyi LuxN quorum-sensing receptor. Mol. Microbiol. 95(1), 127-142 (2015).
Several different arachidonoyl amino acids, including N-arachidonoyl-3-hydroxy-γ-aminobutyric acid (NAG-3H-ABA), have been isolated and characterized from bovine brain. The glycine congener was further characterized and found to suppress formalin-induced pain in rats. NAG-3H-ABA was also found in rat brain by LC-MS techniques, but has not been fully characterized to date. Most arachidonoyl amino acids are poor ligands for the CB1 receptor.