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Carbohydrate-binding module family 18 (CBM18) (also known as chitin binding 1 or chitin recognition protein) is found in a number of plant and fungal proteins that bind N-acetylglucosamine (e.g. solanaceous lectins of tomato and potato, plant endochitinases, the wound-induced proteins: hevein, win1 and win2, and the Kluyveromyces lactis killer ...
Included in the database are families of glycoside hydrolases, [3] glycosyltransferases, [4] polysaccharide lyases, [5] carbohydrate esterases, [6] and non-catalytic carbohydrate-binding modules. [7] The CAZy database also includes a classification of Auxiliary Activity redox enzymes involved in the breakdown of lignocellulose. [8]
HexB is structurally similar to chitobiase, consisting of a beta sandwich structure; this structure is similar to that found in the cellulose-binding domain of cellulase from Cellulomonas fimi. [1] This domain may function as a carbohydrate binding module.
Algal cellulases are modular, consisting of putative novel cysteine-rich carbohydrate-binding modules (CBMs), proline/serine-(PS) rich linkers in addition to putative Ig-like and unknown domains in some members. Cellulase from Gonium pectorale consisted of two CDs separated by linkers and with a C-terminal CBM. [6]
Each selectin has a carbohydrate recognition domain that mediates binding to specific glycans on apposing cells. They have remarkably similar protein folds and carbohydrate binding residues, [1] leading to overlap in the glycans to which they bind. Selectins bind to the sialyl Lewis X (SLe x) determinant “NeuAcα2-3Galβ1-4(Fucα1-3)GlcNAc.”
In molecular biology, the X8 domain, is thought to play a role in targeting the plasmodesmata by providing it with structural support. The domain is able to do this since it contains signal sequences for a glycosylphosphatidylinositol (GPI) linkage to the extracellular face of the plasma membrane.
Calcium-binding EGF domain; Calmodulin-regulated spectrin-associated CKK domain; Calponin family repeat; Calponin homology domain; Calx-beta motif; Carbamoyl phosphate synthetase; Carbohydrate sulfotransferase; Carbohydrate-binding module; Carboxypeptidase A inhibitor; CARD (domain) Carotenoid oxygenase; CAT RNA-binding domain; Cation channel ...
This cellulose binding-site is not present in other CDH classes. The binding to cellulose in Class II CDHs depends on the presence of a C-terminal family 1 carbohydrate binding module (CBM1). Some Class II CDH feature a C-terminal CBM1 and are classified as Class IIA CDHs, whereas Class IIB CDHs have no CBM1 and do not bind to cellulose.