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1zvl

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[[Image:1zvl.gif|left|200px]]
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{{STRUCTURE_1zvl| PDB=1zvl | SCENE= }}
{{STRUCTURE_1zvl| PDB=1zvl | SCENE= }}
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'''Rat Neuronal Nitric Oxide Synthase Oxygenase Domain complexed with natural substrate L-Arg.'''
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===Rat Neuronal Nitric Oxide Synthase Oxygenase Domain complexed with natural substrate L-Arg.===
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==Overview==
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Nitric oxide synthesized from l-arginine by nitric oxide synthase isoforms (NOS-I-III) is physiologically important but also can be deleterious when overproduced. Selective NOS inhibitors are of clinical interest, given their differing pathophysiological roles. Here we describe our approach to target the unique NOS (6R,1'R,2'S)-5,6,7,8-tetrahydrobiopterin (H(4)Bip) binding site. By a combination of ligand- and structure-based design, the structure-activity relationship (SAR) for a focused set of 41 pteridine analogues on four scaffolds was developed, revealing selective NOS-I inhibitors. The X-ray crystal structure of rat NOS-I dimeric-oxygenase domain with H(4)Bip and l-arginine was determined and used for human isoform homology modeling. All available NOS structural information was subjected to comparative analysis of favorable protein-ligand interactions using the GRID/concensus principal component analysis (CPCA) approach to identify the isoform-specific interaction site. Our interpretation, based on protein structures, is in good agreement with the ligand SAR and thus permits the rational design of next-generation inhibitors targeting the H(4)Bip binding site with enhanced isoform selectivity for therapeutics in pathology with NO overproduction.
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The line below this paragraph, {{ABSTRACT_PUBMED_16033258}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 16033258 is the PubMed ID number.
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{{ABSTRACT_PUBMED_16033258}}
==About this Structure==
==About this Structure==
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[[Category: Rat nnosoxy]]
[[Category: Rat nnosoxy]]
[[Category: Targeting tetrahydrobiopterin binding site.]]
[[Category: Targeting tetrahydrobiopterin binding site.]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 18:07:49 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 09:31:43 2008''

Revision as of 06:31, 29 July 2008

Image:1zvl.png

Template:STRUCTURE 1zvl

Rat Neuronal Nitric Oxide Synthase Oxygenase Domain complexed with natural substrate L-Arg.

Template:ABSTRACT PUBMED 16033258

About this Structure

1ZVL is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.

Reference

Structural analysis of isoform-specific inhibitors targeting the tetrahydrobiopterin binding site of human nitric oxide synthases., Matter H, Kumar HS, Fedorov R, Frey A, Kotsonis P, Hartmann E, Frohlich LG, Reif A, Pfleiderer W, Scheurer P, Ghosh DK, Schlichting I, Schmidt HH, J Med Chem. 2005 Jul 28;48(15):4783-92. PMID:16033258

Page seeded by OCA on Tue Jul 29 09:31:43 2008

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