In molecular biology, the glycoside hydrolase family 53 is a family of glycoside hydrolases EC 3.2.1., which 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. This classification is available on the CAZy web site, and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.
These enzymes are endo-1,4- beta-galactanases EC 3.2.1.89. The structure of this domain is known and has a TIM barrel fold.
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