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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.
Afiliación
  • Crane BR; Department of Molecular Biology and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.
Science ; 278(5337): 425-31, 1997 Oct 17.
Article en En | MEDLINE | ID: mdl-9334294
The nitric oxide synthase oxygenase domain (NOSox) oxidizes arginine to synthesize the cellular signal and defensive cytotoxin nitric oxide (NO). Crystal structures determined for cytokine-inducible NOSox reveal an unusual fold and heme environment for stabilization of activated oxygen intermediates key for catalysis. A winged beta sheet engenders a curved alpha-beta domain resembling a baseball catcher's mitt with heme clasped in the palm. The location of exposed hydrophobic residues and the results of mutational analysis place the dimer interface adjacent to the heme-binding pocket. Juxtaposed hydrophobic O2- and polar L-arginine-binding sites occupied by imidazole and aminoguanidine, respectively, provide a template for designing dual-function inhibitors and imply substrate-assisted catalysis.
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Conformación Proteica / Proteínas de Homeodominio / Óxido Nítrico Sintasa / Proteínas de Caenorhabditis elegans / Isoenzimas Idioma: En Revista: Science Año: 1997 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Conformación Proteica / Proteínas de Homeodominio / Óxido Nítrico Sintasa / Proteínas de Caenorhabditis elegans / Isoenzimas Idioma: En Revista: Science Año: 1997 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos