Coenzyme A

Coenzyme A (CAS No.: 85-61-0) is a ubiquitous, endogenously derived coenzyme synthesized from pantothenic acid through an ATP-dependent multistep pathway, and serves as an essential acyl group carrier and carbonyl-activating cofactor in central metabolic networks. It plays a pivotal role in the citric acid cycle, particularly in the oxidative decarboxylation of pyruvate, and is indispensable for the synthesis and β-oxidation of short- and long-chain fatty acids as well as the metabolism of diverse carboxylic acids via formation of high-energy thioester intermediates. Coenzyme A and its thioester derivatives are utilized by a substantial fraction of cellular enzymes, underscoring its broad involvement in intermediary metabolism and cellular energy homeostasis across all domains of life. Mechanistically, it functions by transiently binding and activating acyl groups, thereby facilitating enzymatic transformations in pathways linked to lipid metabolism, mitochondrial function, and biosynthetic processes. The biosynthetic enzyme pantothenate kinase represents a key regulatory node and a recognized target in antibacterial drug discovery efforts. In biochemical and pharmacological research, Coenzyme A is widely employed in studies of metabolic flux, enzyme kinetics, and mitochondrial function, as well as in screening platforms targeting metabolic enzymes and pathways; its activity in vitro is typically characterized within enzyme-dependent systems rather than by conventional potency metrics, and experimental concentrations vary from low micromolar to higher ranges depending on assay design.