Glycoside hydrolase family 26
Encyclopedia
In molecular biology, glycoside hydrolase family 26 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. This classification is available on the CAZy(http://www.cazy.org/GH1.html) web site, and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.
Glycoside hydrolase family 26 CAZY GH_26 comprises enzymes with two known activities; mannanase and β-1,3-xylanase .
Family 26 encompasses mainly mannan endo-1,4-beta-mannosidases. Mannan endo-1,4-beta-mannosidase hydrolyses mannan
and galactomannan
, but displays little activity towards other plant cell wall polysaccharides. The enzyme randomly hydrolyses 1,4-beta-D-linkages in mannans, galacto-mannans, glucomannans
and galactoglucomannans
.
Protein family
A protein family is a group of evolutionarily-related proteins, and is often nearly synonymous with gene family. The term protein family should not be confused with family as it is used in taxonomy....
of glycoside hydrolases
Glycoside hydrolase
Glycoside hydrolases catalyze the hydrolysis of the glycosidic linkage to release smaller sugars...
.
Glycoside hydrolases are a widespread group of enzymes that hydrolyse the glycosidic bond
Glycosidic bond
In chemistry, a glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate....
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(http://www.cazy.org/GH1.html) web site, and also discussed at CAZypedia, an online encyclopedia of carbohydrate active enzymes.
Glycoside hydrolase family 26 CAZY GH_26 comprises enzymes with two known activities; mannanase and β-1,3-xylanase .
Family 26 encompasses mainly mannan endo-1,4-beta-mannosidases. Mannan endo-1,4-beta-mannosidase hydrolyses mannan
Mannan
Mannan is a plant polysaccharide that is a polymer of the sugar mannose.Detection of mannan leads to lysis in the mannan-binding lectin pathway.It is generally found in yeast, bacteria and plants. It shows α linkage. It is a form of storage polysaccharide.-See Also:Mannan Oligosaccharides...
and galactomannan
Galactomannan
Galactomannans are polysaccharides consisting of a mannose backbone with galactose side groups Galactomannans are polysaccharides consisting of a mannose backbone with galactose side groups Galactomannans are polysaccharides consisting of a mannose backbone with galactose side groups (more...
, but displays little activity towards other plant cell wall polysaccharides. The enzyme randomly hydrolyses 1,4-beta-D-linkages in mannans, galacto-mannans, glucomannans
Glucomannan
Glucomannan is a water-soluble polysaccharide that is considered a dietary fiber. Glucomannan is a food additive used as an emulsifier and thickener. Products containing glucomannan, marketed under a variety of brand names, are also sold as nutritional supplements for constipation, obesity, high...
and galactoglucomannans
Galactoglucomannan
Galactoglucomannan is a water-soluble hemicellulose, consisting of galactose, glucose and mannose. Many softwood species, e.g. Norway spruce are rich of galactoglucomannans and can contain it up to 10-20% -Structure:...
.