Required for the synthesis of N-(3-oxodecanoyl)-L-homoserine lactone (ODHL), an autoinducer molecule which binds to VanR. a fatty acyl-[ACP] + S-adenosyl-L-methionine = an N-acyl-L-homoserine lactone + H(+) + holo-[ACP] + S-methyl-5'-thioadenosine Belongs to the autoinducer synthase family.