Alpha-amylase (AMY)

Alpha-amylase is a key digestive enzyme responsible for the hydrolysis of alpha-1,4-glycosidic bonds in complex carbohydrates, such as dietary starch and glycogen, into simpler sugars like maltose and dextrins [6, 8]. The fungal variant, often referred to as fungal diastase and typically derived from Aspergillus oryzae, is widely used in clinical medicine as a digestive aid [2, 5]. It serves as an enzyme replacement therapy for individuals suffering from pancreatic insufficiency, chronic dyspepsia, or other malabsorption syndromes where the body's natural production of amylase is insufficient [5, 13]. By facilitating the breakdown of starch in the gastrointestinal tract, fungal diastase helps alleviate symptoms of indigestion, including bloating, flatulence, and abdominal fullness [11, 14]. In addition to its role as a therapeutic supplement, alpha-amylase is a pharmacological target for inhibitors like acarbose, which are used to manage type 2 diabetes by slowing the digestion of carbohydrates and reducing postprandial blood glucose spikes [11, 16]. The enzyme is active across a broad pH range, making it effective in various parts of the digestive tract, including the mouth and stomach [16]. Therapeutic use of fungal diastase is generally safe, though potential side effects include gastrointestinal distress and rare allergic reactions to fungal proteins [7, 11].

Other names

Fungal diastaseDiastase1,4-alpha-D-glucan glucanohydrolaseFungal alpha-amylaseAspergillus oryzae alpha-amylaseTaka-amylase A

Hydrolysis of alpha-1,4-glycosidic linkages in starch and glycogen; competitive inhibition of enzymatic activity to slow carbohydrate absorption and reduce postprandial glucose spikes.