Glycoside Hydrolase Family 27

Activities in FamilyGalactan:galactan α-galactosyltransferase (EC 2.4.1.-);
Galactomannan exo-α-1,6-galactosidase (EC 3.2.1.-);
α-galactosidase (EC 3.2.1.22);
α-N-acetylgalactosaminidase (EC 3.2.1.49);
[retaining] β-L-arabinopyranosidase / β-L-arabinosidase (EC 3.2.1.88);
[retaining] isomalto-dextranase (EC 3.2.1.94);
Mechanism Retaining a
ClanGH-D
3D Structure Status( β / α ) 8 barrel
Catalytic Nucleophile/BaseAsp
Catalytic Proton DonorAsp
NoteMechanistic commonality with family GH36 demonstrated by Comfort et al. (2007) Biochemistry 46:3319-3330 (PMID: 17323919).
External resourcesCAZypedia; PRINTS; PROSITE;
Commercial Enzyme Provider(s)MEGAZYME; NZYTech; PROZOMIX;
Statistics GenBank accession (5220); Uniprot accession (92); PDB accession (61); 3D entries (14); cryst (0)
unclassified
Protein Name EC#OrganismGenBank UniprotPDB/3D
 GH27_1, α-galactosidase   uncultured organism VDS02529.1    
 GH27_1, α-galactosidase   uncultured organism VDS02573.1    
 MedDCM-OCT-S04-C188-cds6 / ENSANGP00000020847 (fragment)   uncultured organism MedDCM-OCT-S04-C188 ADD95732.1    
 α-galactosidase (GalR) 3.2.1.22 unidentified QCC19990.1
QCC19991.1
   
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