Endo-alpha-N-acetylgalactosaminidase is a member of glycoside hydrolase (GH) family 101 and hydrolases the O-glycosidic bonds in mucin-type O-glycan between alpha-GalNAc and Ser/Thr. It is a multidomain protein [1-5]. It contains a distorted (alpha/beta)8 barrel catalytic domain (referred to as domain 3) flanked by four additional domains, which are mainly made of beta-sheets (domains 2, 4, 5 and 6). This entry represents domain 5 which is part of the carbohydrate binding module.

1: Crystal structure of a heparin- and integrin-binding segment of human fibronectin. Sharma A, Askari JA, Humphries MJ, Jones EY, Stuart DI; EMBO J. 1999;18:1468-1479. PMID:10075919

2: Crystallographic and mutational analyses of substrate recognition of endo-alpha-N-acetylgalactosaminidase from Bifidobacterium longum. Suzuki R, Katayama T, Kitaoka M, Kumagai H, Wakagi T, Shoun H, Ashida H, Yamamoto K, Fushinobu S; J Biochem. 2009;146:389-398. PMID:19502354

3: The structural basis for T-antigen hydrolysis by Streptococcus pneumoniae: a target for structure-based vaccine design. Caines ME, Zhu H, Vuckovic M, Willis LM, Withers SG, Wakarchuk WW, Strynadka NC; J Biol Chem. 2008;283:31279-31283. PMID:18784084

4: Structural Analysis of a Family 101 Glycoside Hydrolase in Complex with Carbohydrates Reveals Insights into Its Mechanism. Gregg KJ, Suits MD, Deng L, Vocadlo DJ, Boraston AB; J Biol Chem. 2015;290:25657-25669. PMID:26304114

5: Structural analysis of biological targets by host:guest crystal lattice engineering. Ernst P, Pluckthun A, Mittl PRE; Sci Rep. 2019;9:15199. PMID:31645583