Glycosyl hydrolase family 26.

Beta-mannanase [Carbohydrate transport and metabolism].

Carbohydrate Binding Module 35 (CBM35); appended to several carbohydrate binding enzymes, including several glycoside hydrolase (GH) family 26 mannanase domains. This family includes carbohydrate binding module 35 (CBM35) domains that are appended to several carbohydrate binding enzymes, including periplasmic component of ABC-type sugar transport system involved in carbohydrate transport and metabolism, and several glycoside hydrolase (GH) domains, including GH26. 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 CMB35s belonging to this family are mannanase A from Clostridium thermocellum (GH26), Man26B from Paenibacillus sp. BME-14 (GH26), and the multifunctional Cel44C-Man26A from Paenibacillus polymyxa GS01 (which has two GH domains, GH44 and GH26). GH26 mainly includes mannan endo-1,4-beta-mannosidase which hydrolyzes 1,4-beta-D-linkages in mannans, galacto-mannans, glucomannans, and galactoglucomannans, but displays little activity towards other plant cell wall polysaccharides. A few proteins belonging to this family have additional CBM3 domains; these CBM3s are not found in the CBM6-CBM35-CBM36_like superfamily.

Carbohydrate binding module (family 35). This is a mannan-specific carbohydrate binding domain, previously known as the X4 module. Unlike other carbohydrate binding modules, binding to substrate causes a conformational change.

Carbohydrate esterase 2 N-terminal. This is the N-terminal beta-sheet domain with jelly roll topology found in CE2 acetyl-esterase from the bacterium Clostridium thermocellum. This enzyme displays dual activities, it catalyses the deacetylation of plant polysaccharides and also potentiates the activity of its appended cellulase catalytic module through its noncatalytic cellulose binding function. This N-terminal jelly-roll domain appears to extend the substrate/cellulose binding cleft of the catalytic domain in C.thermocellum.

ChainA, Gh26 Endo-beta-1,4-mannanase [Podospora anserina S mat+]

Structureof Inactive E165Q mutant of fungal non-CBM carrying GH26 endo-b-mannanase from Yunnania penicillata in complex with alpha-62-61-di-galactosyl-mannotriose [Yunnania penicillata]

Crystalstructure of beta-mannanase from a symbiotic protist of the termite Reticulitermes speratus [Symbiotic protist of Reticulitermes speratus],3WDR_A Crystal structure of beta-mannanase from a symbiotic protist of the termite Reticulitermes speratus complexed with gluco-manno-oligosaccharide [Symbiotic protist of Reticulitermes speratus]

Thestructure of BoMan26B, a GH26 beta-mannanase from Bacteroides ovatus [Bacteroides ovatus ATCC 8483],6HF4_A The structure of BoMan26B, a GH26 beta-mannanase from Bacteroides ovatus, complexed with G1M4 [Bacteroides ovatus ATCC 8483]

Thestructure of GH26A from Muricauda sp. MAR_2010_75 [Muricauda sp. MAR_2010_75],6Q75_B The structure of GH26A from Muricauda sp. MAR_2010_75 [Muricauda sp. MAR_2010_75]

Mannan endo-1,4-beta-mannosidase OS=Myceliophthora thermophila (strain ATCC 42464 / BCRC 31852 / DSM 1799) OX=573729 GN=Man26A PE=1 SV=1

Mannan endo-1,4-beta-mannosidase OS=Rhodothermus marinus (strain ATCC 43812 / DSM 4252 / R-10) OX=518766 GN=manA PE=1 SV=3

Mannan endo-1,4-beta-mannosidase C OS=Piromyces sp. OX=45796 GN=MANC PE=2 SV=1

Mannan endo-1,4-beta-mannosidase B OS=Piromyces sp. OX=45796 GN=MANB PE=2 SV=1

Mannan endo-1,4-beta-mannosidase A OS=Piromyces sp. OX=45796 GN=MANA PE=2 SV=1