Glycosyl hydrolase family 32 family protein. The GH32 family contains glycosyl hydrolase family GH32 proteins that cleave sucrose into fructose and glucose via beta-fructofuranosidase activity, producing invert sugar that is a mixture of dextrorotatory D-glucose and levorotatory D-fructose, thus named invertase (EC 3.2.1.26). This family also contains other fructofuranosidases such as inulinase (EC 3.2.1.7), exo-inulinase (EC 3.2.1.80), levanase (EC 3.2.1.65), and transfructosidases such sucrose:sucrose 1-fructosyltransferase (EC 2.4.1.99), fructan:fructan 1-fructosyltransferase (EC 2.4.1.100), sucrose:fructan 6-fructosyltransferase (EC 2.4.1.10), fructan:fructan 6G-fructosyltransferase (EC 2.4.1.243) and levan fructosyltransferases (EC 2.4.1.-). These retaining enzymes (i.e. they retain the configuration at anomeric carbon atom of the substrate) catalyze hydrolysis in two steps involving a covalent glycosyl enzyme intermediate: an aspartate located close to the N-terminus acts as the catalytic nucleophile and a glutamate acts as the general acid/base; a conserved aspartate residue in the Arg-Asp-Pro (RDP) motif stabilizes the transition state. These enzymes are predicted to display a 5-fold beta-propeller fold as found for GH43 and CH68. The breakdown of sucrose is widely used as a carbon or energy source by bacteria, fungi, and plants. Invertase is used commercially in the confectionery industry, since fructose has a sweeter taste than sucrose and a lower tendency to crystallize. A common structural feature of all these enzymes is a 5-bladed beta-propeller domain, similar to GH43, that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

Glycosyl hydrolase family 32, such as the putative glycoside hydrolase Escherichia coli Aec43 (FosGH2). This glycosyl hydrolase family 32 (GH32) subgroup includes Escherichia coli strain BEN2908 putative glycoside hydrolase Aec43 (FosGH2). GH32 enzymes cleave sucrose into fructose and glucose via beta-fructofuranosidase activity, producing invert sugar that is a mixture of dextrorotatory D-glucose and levorotatory D-fructose, thus named invertase (EC 3.2.1.26). GH32 family also contains other fructofuranosidases such as inulinase (EC 3.2.1.7), exo-inulinase (EC 3.2.1.80), levanase (EC 3.2.1.65), and transfructosidases such sucrose:sucrose 1-fructosyltransferase (EC 2.4.1.99), fructan:fructan 1-fructosyltransferase (EC 2.4.1.100), sucrose:fructan 6-fructosyltransferase (EC 2.4.1.10), fructan:fructan 6G-fructosyltransferase (EC 2.4.1.243) and levan fructosyltransferases (EC 2.4.1.-). These retaining enzymes (i.e. they retain the configuration at anomeric carbon atom of the substrate) catalyze hydrolysis in two steps involving a covalent glycosyl enzyme intermediate: an aspartate located close to the N-terminus acts as the catalytic nucleophile and a glutamate acts as the general acid/base; a conserved aspartate residue in the Arg-Asp-Pro (RDP) motif stabilizes the transition state. These enzymes are predicted to display a 5-fold beta-propeller fold as found for GH43 and CH68. The breakdown of sucrose is widely used as a carbon or energy source by bacteria, fungi, and plants. Invertase is used commercially in the confectionery industry, since fructose has a sweeter taste than sucrose and a lower tendency to crystallize.

Glycosyl hydrolase family 32, beta-fructosidases. Glycosyl hydrolase family GH32 cleaves sucrose into fructose and glucose via beta-fructofuranosidase activity, producing invert sugar that is a mixture of dextrorotatory D-glucose and levorotatory D-fructose, thus named invertase (EC 3.2.1.26). This family also contains other fructofuranosidases such as inulinase (EC 3.2.1.7), exo-inulinase (EC 3.2.1.80), levanase (EC 3.2.1.65), and transfructosidases such sucrose:sucrose 1-fructosyltransferase (EC 2.4.1.99), fructan:fructan 1-fructosyltransferase (EC 2.4.1.100), sucrose:fructan 6-fructosyltransferase (EC 2.4.1.10), fructan:fructan 6G-fructosyltransferase (EC 2.4.1.243) and levan fructosyltransferases (EC 2.4.1.-). These retaining enzymes (i.e. they retain the configuration at anomeric carbon atom of the substrate) catalyze hydrolysis in two steps involving a covalent glycosyl enzyme intermediate: an aspartate located close to the N-terminus acts as the catalytic nucleophile and a glutamate acts as the general acid/base; a conserved aspartate residue in the Arg-Asp-Pro (RDP) motif stabilizes the transition state. These enzymes are predicted to display a 5-fold beta-propeller fold as found for GH43 and CH68. The breakdown of sucrose is widely used as a carbon or energy source by bacteria, fungi, and plants. Invertase is used commercially in the confectionery industry, since fructose has a sweeter taste than sucrose and a lower tendency to crystallize. A common structural feature of all these enzymes is a 5-bladed beta-propeller domain, similar to GH43, that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

Glycosyl hydrolase families 32 and 68, which form the clan GH-J. This glycosyl hydrolase family clan J (according to carbohydrate-active enzymes database (CAZY)) includes family 32 (GH32) and 68 (GH68). GH32 enzymes include invertase (EC 3.2.1.26) and other other fructofuranosidases such as inulinase (EC 3.2.1.7), exo-inulinase (EC 3.2.1.80), levanase (EC 3.2.1.65), and transfructosidases such sucrose:sucrose 1-fructosyltransferase (EC 2.4.1.99), fructan:fructan 1-fructosyltransferase (EC 2.4.1.100), sucrose:fructan 6-fructosyltransferase (EC 2.4.1.10), fructan:fructan 6G-fructosyltransferase (EC 2.4.1.243) and levan fructosyltransferases (EC 2.4.1.-). The GH68 family consists of frucosyltransferases (FTFs) that include levansucrase (EC 2.4.1.10, also known as beta-D-fructofuranosyl transferase), beta-fructofuranosidase (EC 3.2.1.26) and inulosucrase (EC 2.4.1.9). GH32 and GH68 family enzymes are retaining enzymes (i.e. they retain the configuration at anomeric carbon atom of the substrate) and catalyze hydrolysis in two steps involving a covalent glycosyl enzyme intermediate: an aspartate located close to the N-terminus acts as the catalytic nucleophile and a glutamate acts as the general acid/base; a conserved aspartate residue in the Arg-Asp-Pro (RDP) motif stabilizes the transition state. A common structural feature of all these enzymes is a 5-bladed beta-propeller domain, similar to GH43, that contains the catalytic acid and catalytic base. A long V-shaped groove, partially enclosed at one end, forms a single extended substrate-binding surface across the face of the propeller.

Glycoside hydrolase family 130. Members of the glycosyl hydrolase family 130, as classified by the carbohydrate-active enzymes database (CAZY), are phosphorylases and hydrolases for beta-mannosides, and include beta-1,4-mannosylglucose phosphorylase (EC 2.4.1.281), beta-1,4-mannooligosaccharide phosphorylase (EC 2.4.1.319), beta-1,4-mannosyl-N-acetyl-glucosamine phosphorylase (EC 2.4.1.320), beta-1,2-mannobiose phosphorylase (EC 2.4.1.-), beta-1,2-oligomannan phosphorylase (EC 2.4.1.-) and beta-1,2-mannosidase (EC 3.2.1.-). They possess 5-bladed beta-propeller domains similar to families 32, 43, 62, 68, 117 (GH32, GH43, GH62, GH68, GH117). GH130 enzymes are involved in the bacterial utilization of mannans or N-linked glycans. Beta-1,4-mannosylglucose phosphorylase is involved in degradation of beta-1,4-D-mannosyl-N-acetyl-D-glucosamine linkages in the core of N-glycans; it produces alpha-mannose 1-phosphate and glucose from 4-O-beta-D-mannosyl-D-glucose and inorganic phosphate, using a critical catalytic Asp as a proton donor.

ChainA, Sucrose-6-phosphate hydrolase [Frischella perrara],7VCP_A Chain A, Sucrose-6-phosphate hydrolase [Frischella perrara]

ChainA, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIP_B Chain B, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIP_C Chain C, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIP_D Chain D, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIQ_A Chain A, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIQ_B Chain B, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIQ_C Chain C, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIQ_D Chain D, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIR_A Chain A, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIR_B Chain B, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIR_C Chain C, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIR_D Chain D, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIS_A Chain A, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIS_B Chain B, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIS_C Chain C, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514],7FIS_D Chain D, Beta-1,2-mannobiose phosphorylase [Thermoanaerobacter sp. X514]

Firstcrystal structure of an endo-inulinase, from Aspergillus ficuum: structural analysis and comparison with other GH32 enzymes. [Aspergillus ficuum],3SC7_X First crystal structure of an endo-inulinase, from Aspergillus ficuum: structural analysis and comparison with other GH32 enzymes. [Aspergillus ficuum]

Thethree-dimensional structure of beta-fructosidase (invertase) from Thermotoga maritima [Thermotoga maritima MSB8],1UYP_B The three-dimensional structure of beta-fructosidase (invertase) from Thermotoga maritima [Thermotoga maritima MSB8],1UYP_C The three-dimensional structure of beta-fructosidase (invertase) from Thermotoga maritima [Thermotoga maritima MSB8],1UYP_D The three-dimensional structure of beta-fructosidase (invertase) from Thermotoga maritima [Thermotoga maritima MSB8],1UYP_E The three-dimensional structure of beta-fructosidase (invertase) from Thermotoga maritima [Thermotoga maritima MSB8],1UYP_F The three-dimensional structure of beta-fructosidase (invertase) from Thermotoga maritima [Thermotoga maritima MSB8]

beta-fructosidasefrom Thermotoga maritima in complex with raffinose [Thermotoga maritima MSB8],1W2T_B beta-fructosidase from Thermotoga maritima in complex with raffinose [Thermotoga maritima MSB8],1W2T_C beta-fructosidase from Thermotoga maritima in complex with raffinose [Thermotoga maritima MSB8],1W2T_D beta-fructosidase from Thermotoga maritima in complex with raffinose [Thermotoga maritima MSB8],1W2T_E beta-fructosidase from Thermotoga maritima in complex with raffinose [Thermotoga maritima MSB8],1W2T_F beta-fructosidase from Thermotoga maritima in complex with raffinose [Thermotoga maritima MSB8]

Putative glycosyl hydrolase ecdF OS=Aspergillus rugulosus OX=41736 GN=ecdF PE=3 SV=1

Beta-1,2-mannobiose phosphorylase OS=Thermoanaerobacter sp. (strain X514) OX=399726 GN=Teth514_1789 PE=1 SV=1

Beta-fructosidase OS=Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8) OX=243274 GN=bfrA PE=1 SV=1

Extracellular endo-inulinase inuB OS=Aspergillus niger OX=5061 GN=inuB PE=1 SV=1

Extracellular endo-inulinase inuA OS=Aspergillus niger OX=5061 GN=inuA PE=1 SV=1