Glycosyl hydrolase families: GH43, GH62, GH32, GH68, GH117, CH130. Members of the glycosyl hydrolase families 32, 43, 62, 68, 117 and 130 (GH32, GH43, GH62, GH68, GH117, GH130) all possess 5-bladed beta-propeller domains and comprise clans F and J, as classified by the carbohydrate-active enzymes database (CAZY). Clan F consists of families GH43 and GH62. GH43 includes beta-xylosidases (EC 3.2.1.37), beta-xylanases (EC 3.2.1.8), alpha-L-arabinases (EC 3.2.1.99), and alpha-L-arabinofuranosidases (EC 3.2.1.55), using aryl-glycosides as substrates, while family GH62 contains alpha-L-arabinofuranosidases (EC 3.2.1.55) that specifically cleave either alpha-1,2 or alpha-1,3-L-arabinofuranose sidechains from xylans. These are inverting enzymes (i.e. they invert the stereochemistry of the anomeric carbon atom of the substrate) that have an aspartate as the catalytic general base, a glutamate as the catalytic general acid and another aspartate that is responsible for pKa modulation and orienting the catalytic acid. Clan J consists of families GH32 and GH68. GH32 comprises sucrose-6-phosphate hydrolases, invertases (EC 3.2.1.26), inulinases (EC 3.2.1.7), levanases (EC 3.2.1.65), eukaryotic fructosyltransferases, and bacterial fructanotransferases while GH68 consists of frucosyltransferases (FTFs) that include levansucrase (EC 2.4.1.10); beta-fructofuranosidase (EC 3.2.1.26); inulosucrase (EC 2.4.1.9), while GH68 consists of frucosyltransferases (FTFs) that include levansucrase (EC 2.4.1.10); beta-fructofuranosidase (EC 3.2.1.26); inulosucrase (EC 2.4.1.9), all of which use sucrose as their preferential donor substrate. Members of this clan are retaining enzymes (i.e. they retain the configuration at anomeric carbon atom of the substrate) that 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. Structures of all families in the two clans manifest a funnel-shaped active site that comprises two subsites with a single route for access by ligands. Also included in this superfamily are GH117 enzymes that have exo-alpha-1,3-(3,6-anhydro)-l-galactosidase activity, removing terminal non-reducing alpha-1,3-linked 3,6-anhydro-l-galactose residues from their neoagarose substrate, and GH130 that are phosphorylases and hydrolases for beta-mannosides, involved in the bacterial utilization of mannans or N-linked glycans.

Alpha-L-fucosidase.

Alpha-L-fucosidase. O-Glycosyl hydrolases (EC 3.2.1.-) are a widespread group of enzymes that hydrolyse the glycosidic bond between two or more carbohydrates, or between a carbohydrate and a non-carbohydrate moiety. A classification system for glycosyl hydrolases, based on sequence similarity, has led to the definition of 85 different families. This classification is available on the CAZy (CArbohydrate-Active EnZymes) web site. Because the fold of proteins is better conserved than their sequences, some of the families can be grouped in 'clans'. Family 29 encompasses alpha-L-fucosidases, which is a lysosomal enzyme responsible for hydrolyzing the alpha-1,6-linked fucose joined to the reducing-end N-acetylglucosamine of the carbohydrate moieties of glycoproteins. Deficiency of alpha-L-fucosidase results in the lysosomal storage disease fucosidosis.

Alpha-L-fucosidase [Carbohydrate transport and metabolism].

Glycosyl hydrolase families: GH43, GH62, GH32, GH68, GH117, CH130. Members of the glycosyl hydrolase families 32, 43, 62, 68, 117 and 130 (GH32, GH43, GH62, GH68, GH117, GH130) all possess 5-bladed beta-propeller domains and comprise clans F and J, as classified by the carbohydrate-active enzymes database (CAZY). Clan F consists of families GH43 and GH62. GH43 includes beta-xylosidases (EC 3.2.1.37), beta-xylanases (EC 3.2.1.8), alpha-L-arabinases (EC 3.2.1.99), and alpha-L-arabinofuranosidases (EC 3.2.1.55), using aryl-glycosides as substrates, while family GH62 contains alpha-L-arabinofuranosidases (EC 3.2.1.55) that specifically cleave either alpha-1,2 or alpha-1,3-L-arabinofuranose sidechains from xylans. These are inverting enzymes (i.e. they invert the stereochemistry of the anomeric carbon atom of the substrate) that have an aspartate as the catalytic general base, a glutamate as the catalytic general acid and another aspartate that is responsible for pKa modulation and orienting the catalytic acid. Clan J consists of families GH32 and GH68. GH32 comprises sucrose-6-phosphate hydrolases, invertases (EC 3.2.1.26), inulinases (EC 3.2.1.7), levanases (EC 3.2.1.65), eukaryotic fructosyltransferases, and bacterial fructanotransferases while GH68 consists of frucosyltransferases (FTFs) that include levansucrase (EC 2.4.1.10); beta-fructofuranosidase (EC 3.2.1.26); inulosucrase (EC 2.4.1.9), while GH68 consists of frucosyltransferases (FTFs) that include levansucrase (EC 2.4.1.10); beta-fructofuranosidase (EC 3.2.1.26); inulosucrase (EC 2.4.1.9), all of which use sucrose as their preferential donor substrate. Members of this clan are retaining enzymes (i.e. they retain the configuration at anomeric carbon atom of the substrate) that 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. Structures of all families in the two clans manifest a funnel-shaped active site that comprises two subsites with a single route for access by ligands. Also included in this superfamily are GH117 enzymes that have exo-alpha-1,3-(3,6-anhydro)-l-galactosidase activity, removing terminal non-reducing alpha-1,3-linked 3,6-anhydro-l-galactose residues from their neoagarose substrate, and GH130 that are phosphorylases and hydrolases for beta-mannosides, involved in the bacterial utilization of mannans or N-linked glycans.

Crystalstructure of a glycoside hydrolase 29 family member from an unknown rumen bacterium [unidentified]

Crystalstructure of putative alpha-L-fucosidase from Bacteroides thetaiotaomicron [Bacteroides thetaiotaomicron],3EYP_B Crystal structure of putative alpha-L-fucosidase from Bacteroides thetaiotaomicron [Bacteroides thetaiotaomicron],4OUE_A Crystal structure of an a-L-Fucosidase GH29 from Bacteroides thetaiotaomicron (BT2192) in complex with IPTG [Bacteroides thetaiotaomicron VPI-5482],4OUE_B Crystal structure of an a-L-Fucosidase GH29 from Bacteroides thetaiotaomicron (BT2192) in complex with IPTG [Bacteroides thetaiotaomicron VPI-5482],4OZO_A Crystal structure of an a-L-fucosidase GH29 from Bacteroides thetaiotaomicron (BT2192) in complex with oNPTG [Bacteroides thetaiotaomicron VPI-5482],4OZO_B Crystal structure of an a-L-fucosidase GH29 from Bacteroides thetaiotaomicron (BT2192) in complex with oNPTG [Bacteroides thetaiotaomicron VPI-5482]

Crystalstructure of alpha-1,3/4-fucosidase from Bifidobacterium longum subsp. infantis complexed with deoxyfuconojirimycin [Bifidobacterium longum subsp. infantis ATCC 15697 = JCM 1222 = DSM 20088],3UES_B Crystal structure of alpha-1,3/4-fucosidase from Bifidobacterium longum subsp. infantis complexed with deoxyfuconojirimycin [Bifidobacterium longum subsp. infantis ATCC 15697 = JCM 1222 = DSM 20088]

Crystalstructure of a putative alpha-L-fucosidase (BACOVA_04357) from Bacteroides ovatus ATCC 8483 at 1.59 A resolution [Bacteroides ovatus ATCC 8483]

Crystalstructure of alpha-1,3/4-fucosidase from Bifidobacterium longum subsp. infantis D172A/E217A mutant complexed with lacto-N-fucopentaose II [Bifidobacterium longum subsp. infantis ATCC 15697 = JCM 1222 = DSM 20088],3UET_B Crystal structure of alpha-1,3/4-fucosidase from Bifidobacterium longum subsp. infantis D172A/E217A mutant complexed with lacto-N-fucopentaose II [Bifidobacterium longum subsp. infantis ATCC 15697 = JCM 1222 = DSM 20088]

Alpha-L-fucosidase 1 OS=Arabidopsis thaliana OX=3702 GN=FUC1 PE=1 SV=2

Putative alpha-L-fucosidase 1 OS=Oryza sativa subsp. japonica OX=39947 GN=Os04g0560400 PE=3 SV=2

Putative alpha-L-fucosidase OS=Caenorhabditis elegans OX=6239 GN=W03G11.3 PE=3 SV=2

Alpha-L-fucosidase OS=Dictyostelium discoideum OX=44689 GN=alfA PE=3 SV=1

Putative alpha-L-fucosidase OS=Drosophila melanogaster OX=7227 GN=Fuca PE=2 SV=2