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Glycoside hydrolase family 52 : ウィキペディア英語版 | Glycoside hydrolase family 52
In molecular biology, glycoside hydrolase family 52 is a family of glycoside hydrolases. Glycoside hydrolases 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.〔(Bairoch, A. "Classification of glycosyl hydrolase families and index of glycosyl hydrolase entries in SWISS-PROT". 1999. )〕 This classification is available on the CAZy(http://www.cazy.org/GH1.html) web site,〔(Henrissat, B. and Coutinho P.M. "Carbohydrate-Active Enzymes server". 1999. )〕 and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.〔(CAZypedia, an online encyclopedia of carbohydrate-active enzymes. )〕 Glycoside hydrolase family 52 (CAZY GH_52 ) comprises enzymes with only one known activity; beta-xylosidase (). Proteins harboring beta-xylosidase and xylanase activities have been identified in the Gram-positive, facultative thermophilic aerobe ''Bacillus stearothermophilus'' 21.〔 This microbe, which functions in xylan degradation, can utilise xylan as a sole source of carbon. The enzyme hydrolyses 1,4-beta-D-xylans, removing successive D-xylose residues from the non-reducing termini. It also hydrolyses xylobiose. ==References==
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