Redox coupling

Redox coupling is a fundamental biochemical process rather than a discrete target molecule, receptor, or enzyme. It refers to the coordinated linkage of an oxidation reaction (loss of electrons) with a reduction reaction (gain of electrons) between different chemical species [15, 16]. In biological systems, this process is essential for cellular bioenergetics, most notably in the mitochondrial electron transport chain, where 'RedOx coupling' describes the transfer of electrons between complexes (such as Complex I and IV) to drive the translocation of protons across the membrane for ATP synthesis [5]. Additionally, it occurs at the enzyme level, such as the coupling between cytochrome P450 reductase (CPR) and its partner enzymes like CYP3A4, which is critical for drug metabolism and the prevention of reactive oxygen species (ROS) leakage [19]. While not a specific drug target, 'redox coupling' is a targetable mechanism; pharmacological agents like uncouplers or redox-active molecules can modulate the efficiency of these electron transfers to treat metabolic disorders or induce oxidative stress in cancer cells [3, 8, 9].

Other names

Oxidation-reduction couplingRedox pairingElectron transfer couplingMetabolic-redox couplingRedOx coupling

Modulation of electron transfer efficiency between donor and acceptor molecules, or the uncoupling of redox reactions from energy-producing gradients (e.g., proton motive force).