CATH Classification

Domain Context

CATH Clusters

Superfamily Nitric Oxide Synthase;Heme Domain;Chain A domain 2
Functional Family Endothelial nitric oxide synthase

Enzyme Information
Nitric-oxide synthase (NADPH).
based on mapping to UniProt P29473
2 L-arginine + 3 NADPH + 4 O(2) = 2 L-citrulline + 2 nitric oxide + 3 NADP(+) + 4 H(2)O.
-!- The enzyme consists of linked oxygenase and reductase domains. -!- The eukaryotic enzyme binds FAD, FMN, heme (iron protoporphyrin IX) and tetrahydrobiopterin, and its two domains are linked via a regulatory calmodulin-binding domain. -!- Upon calcium-induced calmodulin binding, the reductase and oxygenase domains form a complex, allowing electrons to flow from NADPH via FAD and FMN to the active center. -!- The reductase domain of the enzyme from the bacterium Sorangium cellulosum utilizes a [2Fe-2S] cluster to transfer the electrons from NADPH to the active center. -!- Cf. EC

UniProtKB Entries (1)

Bos taurus
Nitric oxide synthase, endothelial

PDB Structure

External Links
Primary Citation
Exploration of the Active Site of Neuronal Nitric Oxide Synthase by the Design and Synthesis of Pyrrolidinomethyl 2-Aminopyridine Derivatives.
Ji, H., Delker, S.L., Li, H., Martasek, P., Roman, L.J., Poulos, T.L., Silverman, R.B.