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.

Glycoside hydrolases, clan D. This group of glycosyl hydrolase families is comprised of glycosyl hydrolase family 31 (GH31), family 36 (GH36), and family 27 (GH27). These structurally and mechanistically related protein families 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. They have a wide range of functions including alpha-glucosidase, alpha-xylosidase, 6-alpha-glucosyltransferase, 3-alpha-isomaltosyltransferase, alpha-N-acetylgalactosaminidase, stachyose synthase, raffinose synthase, and alpha-1,4-glucan lyase.

Alpha-galactosidase [Carbohydrate transport and metabolism].

TtGalA,alpha-galactosidase from Thermus thermopilus in apo form [Thermus thermophilus HB8],6LCJ_B TtGalA, alpha-galactosidase from Thermus thermopilus in apo form [Thermus thermophilus HB8],6LCJ_C TtGalA, alpha-galactosidase from Thermus thermopilus in apo form [Thermus thermophilus HB8],6LCJ_D TtGalA, alpha-galactosidase from Thermus thermopilus in apo form [Thermus thermophilus HB8],6LCJ_E TtGalA, alpha-galactosidase from Thermus thermopilus in apo form [Thermus thermophilus HB8],6LCJ_F TtGalA, alpha-galactosidase from Thermus thermopilus in apo form [Thermus thermophilus HB8],6LCK_A TtGalA, alpha-galactosidase from Thermus thermophilus in complex with p-nitrophenyl alpha-D-galactopyranoside (alpha-NPG) [Thermus thermophilus HB8],6LCK_B TtGalA, alpha-galactosidase from Thermus thermophilus in complex with p-nitrophenyl alpha-D-galactopyranoside (alpha-NPG) [Thermus thermophilus HB8],6LCK_C TtGalA, alpha-galactosidase from Thermus thermophilus in complex with p-nitrophenyl alpha-D-galactopyranoside (alpha-NPG) [Thermus thermophilus HB8],6LCL_A TtGalA, alpha-galactosidase from Thermus thermophilus in complex with stachyose [Thermus thermophilus HB8],6LCL_C TtGalA, alpha-galactosidase from Thermus thermophilus in complex with stachyose [Thermus thermophilus HB8],6LCL_E TtGalA, alpha-galactosidase from Thermus thermophilus in complex with stachyose [Thermus thermophilus HB8]