1D1W image
Deposition Date 1999-09-21
Release Date 2000-10-25
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1D1W
Keywords:
Title:
BOVINE ENDOTHELIAL NITRIC OXIDE SYNTHASE HEME DOMAIN COMPLEXED WITH 2-AMINOTHIAZOLINE (H4B BOUND)
Biological Source:
Source Organism:
Bos taurus (Taxon ID: 9913)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.00 Å
R-Value Free:
0.25
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:NITRIC OXIDE SYNTHASE
Gene (Uniprot):NOS3
Chain IDs:A, B
Chain Length:444
Number of Molecules:2
Biological Source:Bos taurus
Primary Citation
Mapping the active site polarity in structures of endothelial nitric oxide synthase heme domain complexed with isothioureas.
J.Inorg.Biochem. 81 133 139 (2000)
PMID: 11051558 DOI: 10.1016/S0162-0134(00)00099-4

Abstact

Analyzing the active site topology and plasticity of nitric oxide synthase (NOS) and understanding enzyme-drug interactions are crucial for the development of potent, isoform-selective NOS inhibitors. A small hydrophobic pocket in the active site is identified in the bovine eNOS heme domain structures complexed with potent isothiourea inhibitors: seleno analogue of S-ethyl-isothiourea, S-isopropyl-isothiourea, and 2-aminothiazoline, respectively. These structures reveal the importance of nonpolar van der Waals contacts in addition to the well-known hydrogen bonding interactions between inhibitor and enzyme. The scaffold of a potent NOS inhibitor should be capable of donating hydrogen bonds to as well as making nonpolar contacts with amino acids in the NOS active site.

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Primary Citation of related structures