glycosyl hydrolase family 36 (GH36). GH36 enzymes occur in prokaryotes, eukaryotes, and archaea with a wide range of hydrolytic activities, including alpha-galactosidase, alpha-N-acetylgalactosaminidase, stachyose synthase, and raffinose synthase. All GH36 enzymes cleave a terminal carbohydrate moiety from a substrate that varies considerably in size, depending on the enzyme, and may be either a starch or a glycoprotein. GH36 members are retaining enzymes that cleave their substrates via an acid/base-catalyzed, double-displacement mechanism involving a covalent glycosyl-enzyme intermediate. Two aspartic acid residues have been identified as the catalytic nucleophile and the acid/base, respectively.

glucosidase NET37. NET37 (also known as KIAA1161) is a human lamina-associated nuclear envelope transmembrane protein. A member of the glycosyl hydrolase family 31 (GH31) , it has been shown to be required for myogenic differentiation of C2C12 cells. Related proteins are found in eukaryotes and prokaryotes. Enzymes of the GH31 family possess a wide range of different hydrolytic activities including alpha-glucosidase (glucoamylase and sucrase-isomaltase), alpha-xylosidase, 6-alpha-glucosyltransferase, 3-alpha-isomaltosyltransferase and alpha-1,4-glucan lyase. All GH31 enzymes cleave a terminal carbohydrate moiety from a substrate that varies considerably in size, depending on the enzyme, and may be either a starch or a glycoprotein.

Alpha-galactosidase [Carbohydrate transport and metabolism].

Alpha-glucosidase, glycosyl hydrolase family GH31 [Carbohydrate transport and metabolism].

CtsY (cyclic tetrasaccharide-synthesizing enzyme Y)-like. CtsY is a bacterial 3-alpha-isomaltosyltransferase, first identified in Arthrobacter globiformis, that produces cyclic tetrasaccharides together with a closely related enzyme CtsZ. CtsY and CtsZ both have a glycosyl hydrolase family 31 (GH31) catalytic domain; CtsZ belongs to a different subfamily. All GH31 enzymes cleave a terminal carbohydrate moiety from a substrate that varies considerably in size, depending on the enzyme, and may be either a starch or a glycoprotein.

Crystalstructure of GH36 alpha-galactosidase AgaA from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNR_B Crystal structure of GH36 alpha-galactosidase AgaA from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNR_C Crystal structure of GH36 alpha-galactosidase AgaA from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNR_D Crystal structure of GH36 alpha-galactosidase AgaA from Geobacillus stearothermophilus [Geobacillus stearothermophilus]

galactosidasedomain of alpha-galactosidase-sucrose kinase, AgaSK [[Ruminococcus] gnavus E1],2YFO_A GALACTOSIDASE DOMAIN OF ALPHA-GALACTOSIDASE-SUCROSE KINASE, AGASK, in complex with galactose [[Ruminococcus] gnavus E1]

SpAgawild type apo structure [Streptococcus pneumoniae TIGR4],6PHV_A Chain A, Alpha-galactosidase [Streptococcus pneumoniae TIGR4]

ChainA, Alpha-galactosidase [Streptococcus pneumoniae TIGR4],6PHX_A SpAga D472N structure in complex with raffinose [Streptococcus pneumoniae TIGR4],6PHY_A Chain A, Alpha-galactosidase [Streptococcus pneumoniae TIGR4],6PI0_A AgaD472N-Linear Blood group B type 2 trisaccharide complex structure [Streptococcus pneumoniae TIGR4]

Alpha-galactosidase AgaA OS=Geobacillus stearothermophilus OX=1422 GN=agaA PE=1 SV=1

Bifunctional alpha-galactosidase/sucrose kinase AgaSK OS=Ruminococcus gnavus OX=33038 GN=agaSK PE=1 SV=1