NADPH oxidase complex (NOX complex)

The NADPH oxidase complex is a membrane-bound, multi-protein enzyme complex responsible for generating superoxide, a reactive oxygen species essential for immune cell microbial killing and various redox-dependent cellular functions[1][3][4][5][6][7]. It consists of a catalytic core (NOX isoforms such as NOX2/gp91^phox^) complexed with regulatory subunits (including p22^phox^, p47^phox^, p67^phox^, and Rac GTPase) whose assembly at the membrane is tightly regulated and necessary for enzymatic activity[1][2][3][7]. Impaired complex assembly/function underlies disorders like chronic granulomatous disease, while excessive or dysregulated ROS production contributes to cardiovascular, inflammatory, and neurodegenerative diseases[1][7]. Restoration of NADPH oxidase complex assembly/function is thus both a concept for treating immunodeficiency and a target for inhibiting pathological ROS production in non-infectious diseases[1][4][7].

Other names

Nicotinamide adenine dinucleotide phosphate oxidase complexNOX complexphagocyte oxidase

Inhibition of electron transfer through NOX catalytic core Disruption of complex assembly (inhibiting cytosolic subunit recruitment) Scavenging of ROS (indirect downstream effect)