Metalloprotease. Hydrolysis of peptide bonds in substrates containing five or more amino acids, preferentially with Ala in P1', and Pro in P2'. Binds 1 zinc ion per subunit. Inhibited by ethylene glycol-bis(2-aminoethylether)-N,N,N,N-tetraacetic acid (EGTA), ethylenediaminetetraacetic acid (EDTA) and o-phenanthroline. Optimum pH is 7.5. Optimum temperature is 37 degrees Celsius. Expressed in first, second and fourth juveniles. Not expressed in eggs and adults. Induced upon parasitic infection of insects.