N-(3-Oxooctanoyl)-L-homoserine lactone is a small diffusible signaling molecule and is a member of N-acyl-homoserine lactone family. N-acylhomoserine lactones (AHL) are involved in quorum sensing, controlling gene expression, and cellular metabolism. The diverse applications of this kind of molecule include regulation of virulence in general, infection prevention, and formation of biofilms. This compound stimulates the tra gene expression. It is an autoinducer and potent antagonist. Promotes the expression of the transcriptional activator (and LuxR homolog) TraR, in the gram-negative bacterium A. tumefaciens.