Glycosyl hydrolases family 39.

alpha-beta barrel catalytic domain of agarase, such as GH86-like endo-acting agarases identified in non-marine organisms. Typically, agarases (E.C. 3.2.1.81) are found in ocean-dwelling bacteria since agarose is a principle component of red algae cell wall polysaccharides. Agarose is a linear polymer of alternating D-galactose and 3,6-anhydro-L-galactopyranose. Endo-acting agarases, such as glycoside hydrolase 16 (GH16) and GH86 hydrolyze internal beta-1,4 linkages. GH86-like endo-acting agarase of this protein family has been identified in the human intestinal bacterium Bacteroides uniformis. This acquired metabolic pathway, as demonstrated by the prevalence of agar-specific genetic cluster called polysaccharide utilization loci (PULs), varies considerably between human populations, being much more prevalent in a Japanese sample than in North America, European, or Chinese samples. Agarase activity was also identified in the non-marine bacterium Cellvibrio sp.

Crystalstructure of glucosidase from Croceicoccus marinus at 1.8 Angstrom resolution [Croceicoccus marinus],5Z3K_B Crystal structure of glucosidase from Croceicoccus marinus at 1.8 Angstrom resolution [Croceicoccus marinus]

Crystalstructure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase [Thermoanaerobacterium saccharolyticum],1PX8_B Crystal structure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase [Thermoanaerobacterium saccharolyticum],1UHV_A Crystal structure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase [Thermoanaerobacterium saccharolyticum],1UHV_B Crystal structure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase [Thermoanaerobacterium saccharolyticum],1UHV_C Crystal structure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase [Thermoanaerobacterium saccharolyticum],1UHV_D Crystal structure of beta-D-xylosidase from Thermoanaerobacterium saccharolyticum, a family 39 glycoside hydrolase [Thermoanaerobacterium saccharolyticum]

Crystalstructure of beta-D-xylosidase from Dictyoglomus thermophilum in ligand-free form [Dictyoglomus thermophilum H-6-12],6YYH_B Crystal structure of beta-D-xylosidase from Dictyoglomus thermophilum in ligand-free form [Dictyoglomus thermophilum H-6-12],6YYI_A Crystal structure of beta-D-xylosidase from Dictyoglomus thermophilum bound to beta-D-xylopyranose [Dictyoglomus thermophilum H-6-12],6YYI_B Crystal structure of beta-D-xylosidase from Dictyoglomus thermophilum bound to beta-D-xylopyranose [Dictyoglomus thermophilum H-6-12]

Crystalstructure of the GH39 enzyme from Xanthomonas axonopodis pv. citri [Xanthomonas citri pv. citri str. 306]

Beta-xylosidase OS=Thermoanaerobacterium saccharolyticum (strain DSM 8691 / JW/SL-YS485) OX=1094508 GN=xynB PE=3 SV=1

Beta-xylosidase OS=Caldicellulosiruptor saccharolyticus OX=44001 GN=xynB PE=3 SV=1

Beta-xylosidase OS=Thermoanaerobacterium saccharolyticum OX=28896 GN=xynB PE=1 SV=1