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, J.A.
(1998) Science 279: 2121-2126
- PubMed: 9516116
- Primary Citation of Related Structures:
- Also Cited By: 1QOM, 1DWX, 1DWW, 1DWV
- PubMed Abstract:
- The Structure of Nitric Oxide Synthase Oxygenase Domain and Inhibitor Complexes
Crane, B.R.,Arvai, A.S.,Gachhui, R.,Wu, C.,Ghosh, D.K.,Getzoff, E.D.,Stuehr, D.J.,Tainer, J.A.
(1997) Science 278: 425
- Characterization of the Inducible Nitric Oxide Synthase Oxygenase Domain Identifies a 49 Amino Acid Segment Required for Subunit Dimerization and Tetrahydrobiopterin Interaction
Ghosh, D.K.,Wu, C.,Pitters, E.,Moloney, M.,Werner, E.R.,Mayer, B.,Stuehr, D.J.
(1997) Biochemistry 36: 10609
Crystal structures of the murine cytokine-inducible nitric oxide synthase oxygenase dimer with active-center water molecules, the substrate L-arginine (L-Arg), or product analog thiocitrulline reveal how dimerization, cofactor tetrahydrobiopterin, an ...
Crystal structures of the murine cytokine-inducible nitric oxide synthase oxygenase dimer with active-center water molecules, the substrate L-arginine (L-Arg), or product analog thiocitrulline reveal how dimerization, cofactor tetrahydrobiopterin, and L-Arg binding complete the catalytic center for synthesis of the essential biological signal and cytotoxin nitric oxide. Pterin binding refolds the central interface region, recruits new structural elements, creates a 30 angstrom deep active-center channel, and causes a 35 degrees helical tilt to expose a heme edge and the adjacent residue tryptophan-366 for likely reductase domain interactions and caveolin inhibition. Heme propionate interactions with pterin and L-Arg suggest that pterin has electronic influences on heme-bound oxygen. L-Arginine binds to glutamic acid-371 and stacks with heme in an otherwise hydrophobic pocket to aid activation of heme-bound oxygen by direct proton donation and thereby differentiate the two chemical steps of nitric oxide synthesis.
Department of Molecular Biology and Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.