ID 3.2.1.97 DE endo-alpha-N-acetylgalactosaminidase. AN D-galactosyl-3-(N-acetyl-alpha-D-galactosaminyl)-L-serine AN mucinaminohydrolase. AN D-galactosyl-N-acetyl-alpha-D-galactosamine D-galactosyl-N-acetyl- AN galactosaminohydrolase. AN endo-alpha-acetylgalactosaminidase. AN endo-alpha-GalNAc-ase. AN endo-alpha-N-acetyl-D-galactosaminidase. AN glycopeptide alpha-N-acetylgalactosaminidase. AN mucinaminylserine mucinaminidase. CA (1) H2O + O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D- CA galactosaminyl]-L-seryl-[protein] = beta-D-galactosyl-(1->3)-N-acetyl-D- CA galactosamine + L-seryl-[protein]. CA (2) H2O + O(3)-[beta-D-galactosyl-(1->3)-N-acetyl-alpha-D- CA galactosaminyl]-L-threonyl-[protein] = beta-D-galactosyl-(1->3)-N-acetyl- CA D-galactosamine + L-threonyl-[protein]. CC -!- The enzyme catalyzes the liberation of Gal-(1->3)-beta-GalNAc alpha- CC linked to serine or threonine residues of mucin-type glycoproteins. CC -!- EngBF from Bifidobacterium longum specifically acts on core 1-type CC O-glycan to release the disaccharide Gal-(1->3)-beta-GalNAc. CC -!- The enzymes from Clostridium perfringens, Enterococcus faecalis, CC Propionibacterium acnes and Alcaligenes faecalis show broader CC specificity (e.g. release of the core 2 trisaccharide Gal-(1->3)- CC beta-(GlcNAc-(1->6)-beta)-GalNAc or the core 3 disaccharide GlcNAc- CC (1->3)-beta-GalNAc). CC -!- The enzyme may play an important role in the degradation and CC utilization of mucins having core 1 O-glycan. CC -!- Formerly EC 3.2.1.110. DR A9WNA0, GH101_RENSM; Q2MGH6, GH101_STRPN; Q8DR60, GH101_STRR6; //