Catalytic activity:L-arginine + n NADPH + n H (+) + m O (2) = citrulline + nitric oxide + n NADP (+) . ,cofactor:Binds 1 FAD. ,cofactor:Binds 1 FMN. ,cofactor:Heme group. ,cofactor:Tetrahydrobiopterin (BH4) . May stabilize the dimeric form of the enzyme. ,enzyme regulation:Regulated by calcium/calmodulin. Aspirin inhibits expression and function of this enzyme and effects may be exerted at the level of translational/post-translational modification and directly on the catalytic activity. ,Function:Produces nitric oxide (NO) which is a messenger molecule with diverse functions throughout the body. In macrophages , NO mediates tumoricidal and bactericidal actions. ,induction:By endotoxins and cytokines. ,online information:Nitric oxide synthase entry ,similarity:Belongs to the NOS family. ,similarity:Contains 1 FAD-binding FR-type domain. ,similarity:Contains 1 flavodoxin-like domain. ,subunit:Homodimer. Binds SLC9A3R1. ,tissue specificity:Expressed in the liver , retina , bone cells and airway epithelial cells of the lung. Not expressed in the platelets. ,
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