CATH Classification

Domain Context

CATH Clusters

Superfamily NADPH-cytochrome p450 Reductase; Chain A, domain 3
Functional Family Nitric oxide synthase

Enzyme Information

1.14.13.39
Nitric-oxide synthase (NADPH).
based on mapping to UniProt P29476
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 1.14.14.47.

UniProtKB Entries (1)

P29476
NOS1_RAT
Rattus norvegicus
Nitric oxide synthase, brain

PDB Structure

PDB 1TLL
External Links
Method X-RAY DIFFRACTION
Organism Pichia
Primary Citation
Structural basis for isozyme-specific regulation of electron transfer in nitric-oxide synthase
Garcin, E.D., Bruns, C.M., Lloyd, S.J., Hosfield, D.J., Tiso, M., Gachhui, R., Stuehr, D.J., Tainer, J.A., Getzoff, E.D.
J.Biol.Chem.