Crystal structure of nitric oxide synthase bound to nitro indazole reveals a novel inactivation mechanism.Raman, C.S., Li, H., Martasek, P., Southan, G., Masters, B.S., Poulos, T.L.
(2001) Biochemistry 40: 13448-13455
- PubMed: 11695891
- Primary Citation of Related Structures:  1D0C, 1D0O, 1ED5, 1FOJ, 8NSE
- PubMed Abstract:
- Structure of Nitric Oxide Synthase Oxygenase Dimer with Pterin and Substrate
Crane, B.R.,Arvai, A.S.,Ghosh, D.K.,Wu, C.,Getzoff, E.D.,Stuehr, D.J.,Tainer, A.
(1998) Science 279: 2121
- Efficient Formation of Nitric Oxide from Selective Oxidation of N-Aryl N'- Hydroxyguanidines by Inducible Nitric Oxide Synthase
Renodon-Corniere, A.,Boucher, J.-L.,Dijols, S.,Stuehr, D.J.,Mansuy, D.
(1999) Biochemistry 38: 4663
- Crystal Structure of Constitutive Endothelial Nitric Oxide Synthase: A Paradigm for Pterin Function Involving a Novel Metal Center
Raman, C.S.,Li, H.,Martasek, P.,Kral, V.,Masters, B.S.S.,Poulos, T.L.
(1998) Cell 95: 939
Nitric oxide is generated under normal and pathophysiological conditions by three distinct isoforms of nitric oxide synthase (NOS). A small-molecule inhibitor of NOS (3-Br-7-nitroindazole, 7-NIBr) is profoundly neuroprotective in mouse models of stro ...
Nitric oxide is generated under normal and pathophysiological conditions by three distinct isoforms of nitric oxide synthase (NOS). A small-molecule inhibitor of NOS (3-Br-7-nitroindazole, 7-NIBr) is profoundly neuroprotective in mouse models of stroke and Parkinson's disease. We report the crystal structure of the catalytic heme domain of endothelial NOS complexed with 7-NIBr at 1.65 A resolution. Critical to the binding of 7-NIBr at the substrate site is the adoption by eNOS of an altered conformation, in which a key glutamate residue swings out toward one of the heme propionate groups. Perturbation of the heme propionate ensues and eliminates the cofactor tetrahydrobiopterin-heme interaction. We also present three crystal structures that reveal how alterations at the substrate site facilitate 7-NIBr and structurally dissimilar ligands to occupy the cofactor site.
Department of Molecular Biology & Biochemistry, University of California, Irvine, California 92697, USA. firstname.lastname@example.org