Reaction: Random endo-hydrolysis of N-acetyl-β-D-glucosaminide (1→4)-β-linkages in chitin and chitodextrins
Glossary: chitin = [(1→4)-β-D-GlcpNAc]n = (1→4)-2-acetamido-2-deoxy-β-D-glucan
Other name(s): ChiC; chitodextrinase (ambiguous); 1,4-β-poly-N-acetylglucosaminidase; poly-β-glucosaminidase; β-1,4-poly-N-acetyl glucosamidinase; poly[1,4-(N-acetyl-β-D-glucosaminide)] glycanohydrolase
Systematic name: (1→4)-2-acetamido-2-deoxy-β-D-glucan glycanohydrolase
Comments: The enzyme binds to chitin and randomly cleaves glycosidic linkages in chitin and chitodextrins in a non-processive mode, generating chitooligosaccharides and free ends on which exo-chitinases and exo-chitodextrinases can act. Activity is greatly stimulated in the presence of EC 188.8.131.52, lytic chitin monoxygenase, which attacks the crystalline structure of chitin and makes the polymer more accesible to the chitinase. cf. EC 184.108.40.206, endo-chitodextrinase.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 9001-06-3
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