Endothelial nitric oxide synthase (eNOS) (eNOS)

Endothelial nitric oxide synthase (eNOS), also known as Nitric oxide synthase 3 (NOS3), is a critical enzyme primarily expressed in vascular endothelial cells (UniProt P29474; NCBI Gene 4846). It catalyzes the production of nitric oxide (NO) from the amino acid L-arginine in the presence of oxygen and various cofactors like tetrahydrobiopterin (BH4) (StatPearls, Physiology, Nitric Oxide). NO produced by eNOS plays a fundamental role in maintaining vascular homeostasis by promoting vasodilation, inhibiting platelet aggregation, and preventing leukocyte adhesion to the vessel wall (Forstermann & Sessa, European Heart Journal, 2012). Dysregulation or uncoupling of eNOS leads to reduced NO bioavailability and increased production of reactive oxygen species, contributing significantly to endothelial dysfunction, hypertension, and atherosclerosis (Heiss et al., Clinical Hemorheology and Microcirculation, 2011). Pharmacological strategies often focus on enhancing eNOS expression or activity, such as through the use of statins or ACE inhibitors, to treat cardiovascular and metabolic disorders (Ghimire et al., American Journal of Physiology-Cell Physiology, 2017). The input name was marked as incorrect because it describes a biological pathway or process rather than a specific protein or receptor target.

Other names

Nitric oxide synthase 3NOS3Constitutive NOScNOSEC-NOS

eNOS catalyzes the synthesis of nitric oxide (NO) from L-arginine in the presence of oxygen and cofactors. NO then diffuses into vascular smooth muscle cells, activating soluble guanylate cyclase (sGC) to increase cGMP levels, which leads to protein kinase G activation and subsequent vasodilation.