Bacteriolytic activity against Gram-positive bacterium M.luteus and thereby probably protects against bacterial infection (PubMed:9914527, PubMed:14523554, PubMed:15249048). Also has chitinase activity (PubMed:15249048, PubMed:9914527, PubMed:17631496, PubMed:14523554). May act as an ispopeptidase, cleaving isopeptide bonds between the side chains of Lys and Gln residues in proteins or in the cross-linking peptide of peptidoglycan in bacterial cell walls (PubMed:15249048, PubMed:14523554). Hydrolysis of (1->4)-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in a peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrins. Chitinase activity is activated by high salt concentrations which cause the release of the monomer from the autoinhibited homodimer. Optimum pH is 4-5 at 40 degrees Celsius for chitinase activity. Optimum temperature is 76 degrees Celsius. Homodimer in its autoinhibited state. Active as monomer. Belongs to the glycosyl hydrolase 22 family. Type-I lysozyme subfamily.