N-3-oxo-pentanoyl-L-Homoserine lactone

This compound is a chain-shortened analog of a bacterial quorum sensing signal. It acts as an antagonist of LuxR-type receptors at nanomolar concentrations in vitro and can also function as an autoinducer in certain systems, such as activating luminescence in engineered E. coli. It is a valuable tool for studying microbial communication and developing anti-virulence strategies.