Dietary protein substrate (hydrolyzed by intestinal proteases)

Dietary protein substrates in the GI tract are ingested proteins that are hydrolyzed by protease enzymes such as pepsin, trypsin, chymotrypsin, and carboxypeptidase during digestion[6][3][8]. These substrates are the starting materials for proteolysis, resulting in oligopeptides and free amino acids. The process involves a coordinated action of gastric, pancreatic, and microbial proteases, which enable absorption of amino acids for nutritional needs and metabolic functions. Dysregulation of protease activity, not of the substrate itself, is implicated in gastrointestinal disorders such as irritable bowel syndrome and inflammatory bowel disease[1][2][5]. This entry is a functional substrate category, not a molecular target (such as an enzyme or receptor), and should not be treated as a therapeutic target in pharmacological contexts.

Other names

dietary proteinsingested proteinsgastrointestinal tract protein substrate