Hemicellulase is an enzyme capable of degrading the hemicellulose present in the cell wall of plants.
Hemicellulose is a glucose polymer linked to a monosaccharide which can be a five-carbon polymer such as xylose or a six-carbon polymer such as galactose, mannose or rhamnose.
Hemicellulase belongs to the enzymatic family of glycoside hydrolases. Its action consists in breaking the bond engaging glucose and polymers present in plant fibres with water molecules. The enzymatic reaction leads to the hydrolysis of hemicellulose.