Dietary protein substrates

Dietary protein substrates represent the diverse group of nitrogen-containing macromolecules ingested through food that serve as the fundamental source of amino acids for human physiology (StatPearls, 2023). These substrates are processed by a suite of endogenous proteases, including pepsin and trypsin, to facilitate the absorption of essential nutrients required for protein synthesis, tissue repair, and metabolic signaling (PubMed, 2021). While not a classical therapeutic target such as a receptor or ion channel, dietary proteins are the primary drivers of pathology in several conditions; for example, gluten peptides elicit a damaging immune response in Celiac disease, and the amino acid phenylalanine leads to neurotoxicity in patients with Phenylketonuria (NIH, 2022). Pharmacological management often involves the administration of exogenous enzymes, such as pancrelipase, to assist in the breakdown of these substrates in patients with malabsorption syndromes or the use of enzymes like pegvaliase to degrade specific amino acids (PubChem, 2024). Additionally, the modulation of dietary protein intake is a critical therapeutic strategy in managing chronic kidney disease and various inborn errors of metabolism to prevent the accumulation of toxic nitrogenous byproducts.

Other names

Food proteinsNutritional proteinsAlimentary proteinsExogenous proteins

Substrate for enzymatic hydrolysis by proteases; trigger for immune-mediated enteropathy; source of metabolic nitrogen and specific amino acids requiring enzymatic conversion or clearance.