Amylases Exoenzyme

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pancreatic alpha-amylase 1hny


amylases group of extracellular enzymes (glycoside hydrolases) catalyze hydrolysis of starch maltose. these enzymes grouped 3 classes based on amino acid sequences, mechanism of reaction, method of catalysis , structure. different classes of amylases α-amylases, β-amylases, , glucoamylases. α-amylases hydrolyze starch randomly cleaving 1,4-a-d-glucosidic linkages between glucose units, β-amylases cleave non-reducing chain ends of components of starch such amylose, , glucoamylases hydrolyze glucose molecules ends of amylose , amylopectin. amylases critically important extracellular enzymes , found in plants, animals , micro-organisms. in humans, amylases secreted both pancreas , salivary glands both sources of enzyme required complete starch hydrolysis.








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