Predicted chitinase [General function prediction only].

Glycoside hydrolase family 19, chitinase domain. Chitinases are enzymes that catalyze the hydrolysis of the beta-1,4-N-acetyl-D-glucosamine linkages in chitin polymers. Glycoside hydrolase family 19 chitinases are found primarily in plants (classes I, III, and IV), but some are found in bacteria. Class I and II chitinases are similar in their catalytic domains. Class I chitinases have an N-terminal cysteine-rich, chitin-binding domain which is separated from the catalytic domain by a proline and glycine-rich hinge region. Class II chitinases lack both the chitin-binding domain and the hinge region. Class IV chitinases are similar to class I chitinases, but they are smaller in size due to certain deletions. Despite lacking any significant sequence homology with lysozymes, structural analysis reveals that family 19 chitinases, together with family 46 chitosanases, are similar to several lysozymes including those from T4-phage and from goose. The structures reveal that the different enzyme groups arose from a common ancestor glycohydrolase antecedent to the prokaryotic/eukaryotic divergence.

Chitinase class I.

ChainA, Endolysin [Salmonella phage SPN1S],4OK7_B Chain B, Endolysin [Salmonella phage SPN1S],4OK7_C Chain C, Endolysin [Salmonella phage SPN1S]

Glycosyl hydrolase family 19 domain-containing protein HI_1415 OS=Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd) OX=71421 GN=HI_1415 PE=3 SV=1

Endolysin A OS=Mycobacterium phage D29 OX=28369 GN=10 PE=1 SV=1

Endochitinase At2g43620 OS=Arabidopsis thaliana OX=3702 GN=At2g43620 PE=3 SV=1