DOMON-like type 9 carbohydrate binding module. Family 9 carbohydrate-binding modules (CBM9) play a role in the microbial degradation of cellulose and hemicellulose (materials found in plants). The domain has previously been called cellulose-binding domain. The polysaccharide binding sites of CBMs with available 3D structure have been found to be either flat surfaces with interactions formed by predominantly aromatic residues (tryptophan and tyrosine), or extended shallow grooves. CBM9 domains found in this uncharacterized heterogeneous subfamily are often located at the C-terminus of longer proteins and may co-occur with various other functional domains such as glycosyl hydrolases. The CBM9 module in these architectures may be involved in binding to carbohydrates.
Domon-like ligand-binding domains. DOMON-like domains can be found in all three kindgoms of life and are a diverse group of ligand binding domains that have been shown to interact with sugars and hemes. DOMON domains were initially thought to confer protein-protein interactions. They were subsequently found as a heme-binding motif in cellobiose dehydrogenase, an extracellular fungal oxidoreductase that degrades both lignin and cellulose, and in ethylbenzene dehydrogenase, an enzyme that aids in the anaerobic degradation of hydrocarbons. The domain interacts with sugars in the type 9 carbohydrate binding modules (CBM9), which are present in a variety of glycosyl hydrolases, and it can also be found at the N-terminus of sensor histidine kinases.
DOMON-like type 9 carbohydrate binding module. Family 9 carbohydrate-binding modules (CBM9) play a role in the microbial degradation of cellulose and hemicellulose (materials found in plants). The domain has previously been called cellulose-binding domain. The polysaccharide binding sites of CBMs with available 3D structure have been found to be either flat surfaces with interactions formed by predominantly aromatic residues (tryptophan and tyrosine), or extended shallow grooves. CBM9 domains found in this uncharacterized heterogeneous subfamily are often located at the C-terminus of longer proteins and may co-occur with various other domains.
N-terminal Early set domain associated with the catalytic domain of chitinase. E or "early" set domains are associated with the catalytic domain of chitinase at the N-terminal end. Chitinases hydrolyze the abundant natural biopolymer chitin, producing smaller chito-oligosaccharides. Chitin consists of multiple N-acetyl-D-glucosamine (NAG) residues connected via beta-1,4-glycosidic linkages and is an important structural element of fungal cell wall and arthropod exoskeletons. On the basis of the mode of chitin hydrolysis, chitinases are classified as random, endo-, and exo-chitinases and belong to families 18 and 19 of glycosyl hydrolases based on sequence criteria. The N-terminal domain of chitinase may be related to the immunoglobulin and/or fibronectin type III superfamilies. These domains are associated with different types of catalytic domains at either the N-terminal or C-terminal end and may be involved in homodimeric/tetrameric/dodecameric interactions. Members of this family include members of the alpha amylase family, sialidase, galactose oxidase, cellulase, cellulose, hyaluronate lyase, chitobiase, and chitinase, among others.
N-terminal Early set domain associated with the catalytic domain of chitinase. E or "early" set domains are associated with the catalytic domain of chitinase at the N-terminal end. Chitinases hydrolyze the abundant natural biopolymer chitin, producing smaller chito-oligosaccharides. Chitin consists of multiple N-acetyl-D-glucosamine (NAG) residues connected via beta-1,4-glycosidic linkages and is an important structural element of fungal cell wall and arthropod exoskeletons. On the basis of the mode of chitin hydrolysis, chitinases are classified as random, endo-, and exo-chitinases and belong to families 18 and 19 of glycosyl hydrolases based on sequence criteria. The N-terminal domain of chitinase may be related to the immunoglobulin and/or fibronectin type III superfamilies. These domains are associated with different types of catalytic domains at either the N-terminal or C-terminal end and may be involved in homodimeric/tetrameric/dodecameric interactions. Members of this family include members of the alpha amylase family, sialidase, galactose oxidase, cellulase, cellulose, hyaluronate lyase, chitobiase, and chitinase, among others.
Structuralinsights into a family 39 glycoside hydrolase from the gut symbiont Bacteroides cellulosilyticus WH2. [Bacteroides cellulosilyticus],5JVK_B Structural insights into a family 39 glycoside hydrolase from the gut symbiont Bacteroides cellulosilyticus WH2. [Bacteroides cellulosilyticus],5JVK_C Structural insights into a family 39 glycoside hydrolase from the gut symbiont Bacteroides cellulosilyticus WH2. [Bacteroides cellulosilyticus]