2-Hydroxy-3-methylbutanoic acid

2-Hydroxy-3-methylbutanoic acid (CAS No.: 4026-18-0) is a small endogenous metabolite and α-hydroxy analogue of valine that functions as an intermediate in branched-chain amino acid metabolism and serves as a biochemical precursor to valine, thereby contributing to protein synthesis and nitrogen balance in biological systems. Structurally related to γ-hydroxybutyrate, a naturally occurring neuromodulatory molecule in the central nervous system, this compound is widely employed as a research tool to investigate GHB-associated receptor interactions, neuromodulatory signaling pathways, and metabolic networks relevant to amino acid catabolism and nitrogen homeostasis. Although its precise molecular targets remain incompletely characterized, studies suggest it may influence metabolic flux and receptor-mediated processes in the low micromolar to millimolar concentration range depending on experimental context. In vitro and in vivo models, including neuronal systems and animal nutrition studies, utilize this compound to explore mechanisms underlying amino acid utilization, growth regulation, and central nervous system biochemical pathways, with dosing or concentration parameters varying according to specific experimental designs and objectives.