xylosidase XylS-like. XylS is a glycosyl hydrolase family 31 (GH31) alpha-xylosidase found in prokaryotes, eukaryotes, and archaea, that catalyzes the release of alpha-xylose from the non-reducing terminal side of the alpha-xyloside substrate. XylS has been characterized in Sulfolobus solfataricus where it hydrolyzes isoprimeverose, the p-nitrophenyl-beta derivative of isoprimeverose, and xyloglucan oligosaccharides, and has transxylosidic activity. 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. The XylS family corresponds to subgroup 3 in the Ernst et al classification of GH31 enzymes.

Glycosyl hydrolases family 31. Glycosyl hydrolases are key enzymes of carbohydrate metabolism. Family 31 comprises of enzymes that are, or similar to, alpha- galactosidases.

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

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.

Bacteroidesovatus Xyloglucan PUL GH31 [Bacteroides ovatus],5JOV_A Bacteroides ovatus Xyloglucan PUL GH31 with bound 5FIdoF [Bacteroides ovatus]

ChainA, Alpha-xylosidase [Xanthomonas citri pv. citri str. 306],7KNC_A Chain A, Alpha-xylosidase [Xanthomonas citri pv. citri str. 306]

crystalstructure of alpha-xylosidase (GH31) from Cellvibrio japonicus [Cellvibrio japonicus],2XVK_A crystal structure of alpha-xylosidase (GH31) from Cellvibrio japonicus in complex with 5-fluoro-alpha-D-xylopyranosyl fluoride [Cellvibrio japonicus],2XVL_A crystal structure of alpha-xylosidase (GH31) from Cellvibrio japonicus in complex with Pentaerythritol propoxylate (5 4 PO OH) [Cellvibrio japonicus]

Xylosidasefrom Aspergillus niger [Aspergillus niger],6DRU_B Xylosidase from Aspergillus niger [Aspergillus niger]

Flavobacteriumjohnsoniae GH31 dextranase, FjDex31A [Flavobacterium johnsoniae UW101],6JR6_B Flavobacterium johnsoniae GH31 dextranase, FjDex31A [Flavobacterium johnsoniae UW101],6JR6_C Flavobacterium johnsoniae GH31 dextranase, FjDex31A [Flavobacterium johnsoniae UW101],6JR6_D Flavobacterium johnsoniae GH31 dextranase, FjDex31A [Flavobacterium johnsoniae UW101],6JR7_A Flavobacterium johnsoniae GH31 dextranase, FjDex31A, complexed with glucose [Flavobacterium johnsoniae UW101],6JR7_B Flavobacterium johnsoniae GH31 dextranase, FjDex31A, complexed with glucose [Flavobacterium johnsoniae UW101],6JR7_C Flavobacterium johnsoniae GH31 dextranase, FjDex31A, complexed with glucose [Flavobacterium johnsoniae UW101],6JR7_D Flavobacterium johnsoniae GH31 dextranase, FjDex31A, complexed with glucose [Flavobacterium johnsoniae UW101]

Alpha-xylosidase BoGH31A OS=Bacteroides ovatus (strain ATCC 8483 / DSM 1896 / JCM 5824 / BCRC 10623 / CCUG 4943 / NCTC 11153) OX=411476 GN=BACOVA_02646 PE=1 SV=1

Alpha-xylosidase OS=Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2) OX=273057 GN=xylS PE=1 SV=1

Uncharacterized family 31 glucosidase ORF2 (Fragment) OS=Pseudescherichia vulneris OX=566 PE=3 SV=1

Alpha-xylosidase A OS=Aspergillus niger (strain CBS 513.88 / FGSC A1513) OX=425011 GN=axlA PE=1 SV=1

Alpha-glucosidase 2 OS=Bacillus thermoamyloliquefaciens OX=1425 PE=3 SV=1