beta-glucosidase 2, glycosyl-hydrolase family 116 N-term. This domain is found in bacteria, archaea and eukaryotes. This domain is typically between 320 to 354 amino acids in length. This domain is found associated with pfam04685. It is found just after the extreme N-terminus. The N-terminal is thought to be the luminal domain while the C terminal is the cytosolic domain. The catalytic domain of GBA-2 is unknown. The primary catabolic pathway for glucosylceramide is catalysis by the lysosomal enzyme glucocerebrosidase. In higher eukaryotes, glucosylceramide is the precursor of glycosphingolipids, a complex group of ubiquitous membrane lipids. Mutations in the human protein cause motor-neurone defects in hereditary spastic paraplegia. The catalytic nucleophile, identified in UniProtKB:Q97YG8_SULSO, is a glutamine-335 in the downstream family pfam04685.

COG4354 Uncharacterized protein, contains GBA2_N and DUF608 domains [Function unknown].

Carbohydrate Binding Module 6 (CBM6); many are appended to glycoside hydrolase (GH) family 11 and GH43 xylanase domains. This family includes carbohydrate binding module 6 (CBM6) domains that are appended mainly to glycoside hydrolase (GH) family domains, including GH3, GH11, and GH43 domains. These CBM6s are non-catalytic carbohydrate binding domains that facilitate the strong binding of the GH catalytic modules with their dedicated, insoluble substrates. Examples of proteins having CMB6s belonging to this family are Microbispora bispora GghA, a 1,4-beta-D-glucan glucohydrolase (GH3); Clostridium thermocellum xylanase U (GH11), and Penicillium purpurogenum ABF3, a bifunctional alpha-L-arabinofuranosidase/xylobiohydrolase (GH43). GH3 comprises enzymes with activities including beta-glucosidase (hydrolyzes beta-galactosidase) and beta-xylosidase (hydrolyzes 1,4-beta-D-xylosidase). GH11 family comprises enzymes with xylanase (endo-1,4-beta-xylanase) activity which catalyze the hydrolysis of beta-1,4 bonds of xylan, the major component of hemicelluloses, to generate xylooligosaccharides and xylose. GH43 includes beta-xylosidases and beta-xylanases, using aryl-glycosides as substrates. CBM6 is an unusual CBM as it represents a chimera of two distinct binding sites with different modes of binding: binding site I within the loop regions and binding site II on the concave face of the beta-sandwich fold.

Carbohydrate Binding Module 6 (CBM6); many are appended to glycoside hydrolase (GH) family 11 and GH43 xylanase domains. This family includes carbohydrate binding module 6 (CBM6) domains that are appended mainly to glycoside hydrolase (GH) family domains, including GH3, GH11, and GH43 domains. These CBM6s are non-catalytic carbohydrate binding domains that facilitate the strong binding of the GH catalytic modules with their dedicated, insoluble substrates. Examples of proteins having CMB6s belonging to this family are Microbispora bispora GghA, a 1,4-beta-D-glucan glucohydrolase (GH3); Clostridium thermocellum xylanase U (GH11), and Penicillium purpurogenum ABF3, a bifunctional alpha-L-arabinofuranosidase/xylobiohydrolase (GH43). GH3 comprises enzymes with activities including beta-glucosidase (hydrolyzes beta-galactosidase) and beta-xylosidase (hydrolyzes 1,4-beta-D-xylosidase). GH11 family comprises enzymes with xylanase (endo-1,4-beta-xylanase) activity which catalyze the hydrolysis of beta-1,4 bonds of xylan, the major component of hemicelluloses, to generate xylooligosaccharides and xylose. GH43 includes beta-xylosidases and beta-xylanases, using aryl-glycosides as substrates. CBM6 is an unusual CBM as it represents a chimera of two distinct binding sites with different modes of binding: binding site I within the loop regions and binding site II on the concave face of the beta-sandwich fold.

Cellulose Binding Domain Type IV.

CrystalStructure of a Family 6 Carbohydrate-Binding Module from Clostridium cellulolyticum in complex with xylose [Ruminiclostridium cellulolyticum]

ChainA, Alpha-1,6-mannanase [Niallia circulans],5M77_B Chain B, Alpha-1,6-mannanase [Niallia circulans]

ChainA, CBM6 [Acetivibrio thermocellus],1UXX_X Chain X, Xylanase U [Acetivibrio thermocellus]

ChainA, Bh0236 Protein [Halalkalibacterium halodurans],1W9S_B Chain B, Bh0236 Protein [Halalkalibacterium halodurans],1W9T_A Chain A, Bh0236 Protein [Halalkalibacterium halodurans],1W9T_B Chain B, Bh0236 Protein [Halalkalibacterium halodurans],1W9W_A Chain A, Bh0236 Protein [Halalkalibacterium halodurans]

Bindingsub-site dissection of a family 6 carbohydrate-binding module by X-ray crystallography and isothermal titration calorimetry [Thermoclostridium stercorarium],1UY2_A Binding sub-site dissection of a family 6 carbohydrate-binding module by X-ray crystallography and isothermal titration calorimetry [Thermoclostridium stercorarium],1UY3_A Binding sub-site dissection of a family 6 carbohydrate-binding module by X-ray crystallography and isothermal titration calorimetry [Thermoclostridium stercorarium],1UY4_A Binding sub-site dissection of a family 6 carbohydrate-binding module by X-ray crystallography and isothermal titration calorimetry [Thermoclostridium stercorarium]

Endo-1,4-beta-xylanase A OS=Thermoclostridium stercorarium OX=1510 GN=xynA PE=1 SV=2

Endo-1,4-beta-xylanase A OS=Thermoclostridium stercorarium OX=1510 GN=xynA PE=1 SV=2

Non-lysosomal glucosylceramidase OS=Rattus norvegicus OX=10116 GN=Gba2 PE=2 SV=2