Glycoside hydrolase family 45
| Glycosyl hydrolase family 45 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 endoglucanase from humicola insolens at 1.7a resolution | |||||||||
| Identifiers | |||||||||
| Symbol | Glyco_hydro_45 | ||||||||
| Pfam | PF02015 | ||||||||
| Pfam clan | CL0199 | ||||||||
| InterPro | IPR000334 | ||||||||
| PROSITE | PDOC00877 | ||||||||
| SCOP | 2eng | ||||||||
| SUPERFAMILY | 2eng | ||||||||
| CAZy | GH45 | ||||||||
| |||||||||
In molecular biology, glycoside hydrolase family 45 is a family of glycoside hydrolases.
Glycoside hydrolases EC 3.2.1. are a widespread group of enzymes that hydrolyse the glycosidic bond between two or more carbohydrates, or between a carbohydrate and a non-carbohydrate moiety. A classification system for glycoside hydrolases, based on sequence similarity, has led to the definition of >100 different families.[1][2][3] This classification is available on the CAZy(http://www.cazy.org/GH1.html) web site,[4] and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.[5]
Glycoside hydrolase family 45 CAZY GH_45 comprises enzymes with only one known activity; endoglucanase (EC 3.2.1.4). This family is also known as cellulase family K.[6] The best conserved region in these enzymes is located in the N-terminal section. It contains an aspartic acid residue which has been shown[7] to act as a nucleophile in the catalytic mechanism. This also has several cysteines that are involved in forming disulphide bridges.
References
- ↑ Henrissat B, Callebaut I, Mornon JP, Fabrega S, Lehn P, Davies G (1995). "Conserved catalytic machinery and the prediction of a common fold for several families of glycosyl hydrolases". Proc. Natl. Acad. Sci. U.S.A. 92 (15): 7090–7094. doi:10.1073/pnas.92.15.7090. PMC 41477
. PMID 7624375. - ↑ Henrissat B, Davies G (1995). "Structures and mechanisms of glycosyl hydrolases". Structure. 3 (9): 853–859. doi:10.1016/S0969-2126(01)00220-9. PMID 8535779.
- ↑ Bairoch, A. "Classification of glycosyl hydrolase families and index of glycosyl hydrolase entries in SWISS-PROT". 1999.
- ↑ Henrissat, B. and Coutinho P.M. "Carbohydrate-Active Enzymes server". 1999.
- ↑ CAZypedia, an online encyclopedia of carbohydrate-active enzymes.
- ↑ Henrissat B, Bairoch A (1993). "New families in the classification of glycosyl hydrolases based on amino acid sequence similarities". Biochem. J. 293: 781–788. doi:10.1042/bj2930781. PMC 1134435. PMID 8352747.
- ↑ Dodson GG, Schulein M, Davies GJ, Dauter Z, Wilson KS, Hubbard RE, Tolley SP, Hjort C, Mikkelsen JM, Rasmussen G (1993). "Structure and function of endoglucanase V". Nature. 365 (6444): 362–364. doi:10.1038/365362a0. PMID 8377830.
This article incorporates text from the public domain Pfam and InterPro IPR000334