Melibiase. Glycoside hydrolase families GH27, GH31 and GH36 form the glycoside hydrolase clan GH-D. Glycoside hydrolase family 36 can be split into 11 families, GH36A to GH36K. This family includes enzymes from GH36A-B and GH36D-K and from GH27.

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.

Alpha-galactosidase [Carbohydrate transport and metabolism].

glycosyl hydrolase family 27 (GH27). GH27 enzymes occur in eukaryotes, prokaryotes, and archaea with a wide range of hydrolytic activities, including alpha-glucosidase (glucoamylase and sucrase-isomaltase), alpha-N-acetylgalactosaminidase, and 3-alpha-isomalto-dextranase. All GH27 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. GH27 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.

Crystalstructure of GH36 alpha-galactosidase AgaB from Geobacillus stearothermophilus [Geobacillus stearothermophilus]

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]

Crystalstructure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNP_B Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNP_C Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNP_D Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus [Geobacillus stearothermophilus],4FNS_A Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus in complex with 1-deoxygalactonojirimycin [Geobacillus stearothermophilus],4FNS_B Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus in complex with 1-deoxygalactonojirimycin [Geobacillus stearothermophilus],4FNS_C Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus in complex with 1-deoxygalactonojirimycin [Geobacillus stearothermophilus],4FNS_D Crystal structure of GH36 alpha-galactosidase AgaA A355E from Geobacillus stearothermophilus in complex with 1-deoxygalactonojirimycin [Geobacillus stearothermophilus]

Crystalstructure of GH36 alpha-galactosidase AgaA A355E D548N from Geobacillus stearothermophilus in complex with raffinose [Geobacillus stearothermophilus],4FNT_B Crystal structure of GH36 alpha-galactosidase AgaA A355E D548N from Geobacillus stearothermophilus in complex with raffinose [Geobacillus stearothermophilus],4FNT_C Crystal structure of GH36 alpha-galactosidase AgaA A355E D548N from Geobacillus stearothermophilus in complex with raffinose [Geobacillus stearothermophilus],4FNT_D Crystal structure of GH36 alpha-galactosidase AgaA A355E D548N from Geobacillus stearothermophilus in complex with raffinose [Geobacillus stearothermophilus]

Crystalstructure of the glycoside hydrolase family 36 alpha-galactosidase from Paecilomyces thermophila [Paecilomyces sp. 'thermophila'],6JHP_B Crystal structure of the glycoside hydrolase family 36 alpha-galactosidase from Paecilomyces thermophila [Paecilomyces sp. 'thermophila'],6JHP_C Crystal structure of the glycoside hydrolase family 36 alpha-galactosidase from Paecilomyces thermophila [Paecilomyces sp. 'thermophila'],6JHP_D Crystal structure of the glycoside hydrolase family 36 alpha-galactosidase from Paecilomyces thermophila [Paecilomyces sp. 'thermophila']

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

Alpha-galactosidase C OS=Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139) OX=227321 GN=aglC PE=1 SV=1

Alpha-galactosidase Mel36A OS=Lactobacillus acidophilus (strain ATCC 700396 / NCK56 / N2 / NCFM) OX=272621 GN=melA PE=1 SV=1

Alpha-galactosidase 1 OS=Pediococcus pentosaceus OX=1255 GN=agaR PE=3 SV=1

Probable alpha-galactosidase C OS=Aspergillus oryzae (strain ATCC 42149 / RIB 40) OX=510516 GN=aglC PE=3 SV=1