Hydrolyzes the acyl homoserine lactones N-hexanoyl-L-homoserine lactone, N-3-oxohexanoyl-L-homoserine lactone, N-octonoyl-L-homoserine lactone, N-decanoyl-L-homoserine lactone and N-3-oxododecanoyl-L-homoserine lactone. an N-acyl-L-homoserine lactone + H2O = an N-acyl-L-homoserine + H(+) Binds 2 Zn(2+) ions per subunit. Belongs to the metallo-beta-lactamase superfamily.