N-cis-octadec-9Z-enoyl-L-Homoserine lactone

Quorum sensing is a regulatory process used by bacteria for controlling gene expression in response to increasing cell density.¹ This regulatory process manifests itself with a variety of phenotypes including biofilm formation and virulence factor production.² Coordinated gene expression is achieved by the production, release, and detection of small diffusible signal molecules called autoinducers. The N-acylated homoserine lactones (AHLs) comprise one such class of autoinducers, each of which generally consists of a fatty acid coupled with homoserine lactone (HSL). AHLs vary in acyl group length (C₄-C₁₈), in the substitution of C3 (hydrogen, hydroxyl, or oxo group) and in the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signal specificity through the affinity of transcriptional regulators of the LuxR family.³ N-cis-octadec-9Z-enoyl-L-Homoserine lactone is a long-chain AHL that may have antimicrobial activity⁴ and thus, might be used to inhibit pathogenesis by regulating bacerial quorum sensing signaling.⁵

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2. Gould, T.A., Herman, J., Krank, J., et al. Specificity of acyl-homoserine lactone syntheses examined by mass spectrometry. J. Bacteriol. 188(2), 773-783 (2006).

3. Penalver, C.G.N., Morin, D., Cantet, F., et al. Methylobacterium extorquens AM1 produces a novel type of acyl-homoserine lactone with a double unsaturated side chain under methylotrophic growth conditions. FEBS Lett. 580(2), 561-567 (2006).

4. Kajiyama, S., Tawara, T., and Tamano, A. Production of homoserine lactone derivative. JP19830153621 19830823, 535-540 (1985).

5. Cegelski, L., Marshall, G.R., Eldridge, G.R., et al. The biology and future prospects of antivirulence therapies. Nat. Rev. Microbiol. 6(1), 17-27 (2008).