Beta-galactosidases belong to glycosyl hydrolase 35 family (GH35) which catalyse the cleaveage of beta-linked terminal galactosyl residues from gangliosides, glycoproteins, and glycosaminoglycans. These proteins consist of a catalytic TIM-barrel and two all-beta domains (ABD1 and ABD2) [1-5]. This entry represents the first all-beta domain ABD1. ABD2 is represented in Pfam:PF13364.

1: Crystal structure of human beta-galactosidase: structural basis of Gm1 gangliosidosis and morquio B diseases. Ohto U, Usui K, Ochi T, Yuki K, Satow Y, Shimizu T; J Biol Chem. 2012;287:1801-1812. PMID:22128166

2: Structural insights into the substrate specificity of Streptococcus pneumoniae beta(1,3)-galactosidase BgaC. Cheng W, Wang L, Jiang YL, Bai XH, Chu J, Li Q, Yu G, Liang QL, Zhou CZ, Chen Y; J Biol Chem. 2012;287:22910-22918. PMID:22593580

3: Rational design of a glycosynthase by the crystal structure of beta-galactosidase from Bacillus circulans (BgaC) and its use for the synthesis of N-acetyllactosamine type 1 glycan structures. Henze M, You DJ, Kamerke C, Hoffmann N, Angkawidjaja C, Ernst S, Pietruszka J, Kanaya S, Elling L; J Biotechnol. 2014;191:78-85. PMID:25034434

4: A surface endogalactanase in Bacteroides thetaiotaomicron confers keystone status for arabinogalactan degradation. Cartmell A, Munoz-Munoz J, Briggs JA, Ndeh DA, Lowe EC, Basle A, Terrapon N, Stott K, Heunis T, Gray J, Yu L, Dupree P, Fernandes PZ, Shah S, Williams SJ, Labourel A, Trost M, Henrissat B, Gilbert HJ; Nat Microbiol. 2018;3:1314-1326. PMID:30349080

5: Structure of the murine lysosomal multienzyme complex core. Gorelik A, Illes K, Hasan SMN, Nagar B, Mazhab-Jafari MT; Sci Adv. 2021; [Epub ahead of print] PMID:33980489