Probable hydrolase that is able to inhibit the signaling pathway required for the streptomycin production and development of aerial mycelium in S.griseus. Thus, serves as a defensive strategy against competing bacteria. The putative target for YtnP may be a gamma-butyrolactone termed A factor, which is the quorum-sensing signaling molecule that positively regulates streptomycin production and development of aerial hyphae in S.griseus. Binds 2 Zn(2+) ions per subunit. By the antimicrobial streptomycin, produced by the Gram-positive bacterium S.griseus. Belongs to the metallo-beta-lactamase superfamily. Truncated N-terminus. Truncated N-terminus.