Metabolic substrate

A metabolic substrate is a chemical molecule that serves as the starting material for a biochemical reaction catalyzed by an enzyme within a metabolic pathway (Source: Nelson & Cox, Lehninger Principles of Biochemistry, 2021). These substances, which include carbohydrates, lipids, amino acids, and nucleotides, are essential for generating cellular energy in the form of ATP and providing the raw materials for the biosynthesis of complex macromolecules (Source: Berg et al., Biochemistry, 2015). In a physiological context, the concentration and availability of specific substrates are tightly regulated to maintain metabolic homeostasis and respond to cellular demands. While specific substrates like glucose or levodopa are used therapeutically, the term "metabolic substrate" itself is a broad functional category rather than a specific, well-defined therapeutic target like a receptor or a protein kinase (Source: Rang & Dale's Pharmacology, 2019). In drug discovery, the actual targets are typically the enzymes that process these substrates or the transporters that facilitate their movement across biological membranes. Consequently, this entry is considered a generic classification that lacks the specificity required for a distinct pharmacological target profile.

Other names

SubstrateEnzymatic substrateBiochemical substrateMetabolite

Substrate replacement therapy or enzymatic flux modulation