1D1X image
Deposition Date 1999-09-21
Release Date 2001-07-25
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1D1X
Keywords:
Title:
BOVINE ENDOTHELIAL NITRIC OXIDE SYNTHASE HEME DOMAIN COMPLEXED WITH 1,4-PBITU (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:
0.22
R-Value Observed:
0.22
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:BOVINE ENDOTHELIAL NITRIC OXIDE SYNTHASE HEME DOMAIN
Gene (Uniprot):NOS3
Chain IDs:A, B
Chain Length:444
Number of Molecules:2
Biological Source:Bos taurus
Primary Citation
Implications for isoform-selective inhibitor design derived from the binding mode of bulky isothioureas to the heme domain of endothelial nitric-oxide synthase.
J.Biol.Chem. 276 26486 26491 (2001)
PMID: 11331290 DOI: 10.1074/jbc.M102255200

Abstact

Nitric oxide produced by nitric-oxide synthase (NOS) is not only involved in a wide range of physiological functions but also in a variety of pathological conditions. Isoform-selective NOS inhibitors are highly desirable to regulate the NO production of one isoform beneficial to normal physiological functions from the uncontrolled NO production of another isoform that accompanies certain pathological states. Crystal structures of the heme domain of the three NOS isoforms have revealed a very high degree of similarity in the immediate vicinity of the heme active site illustrating the challenge of isoform-selective inhibitor design. Isothioureas are potent NOS inhibitors, and the structures of the endothelial NOS heme domain complexed with isothioureas bearing small S-alkyl substituents have been determined (Li, H., Raman, C.S., Martasek, P., Kral, V., Masters, B.S.S., and Poulos, T.L. (2000) J. Inorg. Biochem. 81, 133--139). In the present communication, the binding mode of larger bisisothioureas complexed to the endothelial NOS heme domain has been determined. These structures afford a structural rationale for the known inhibitory activities. In addition, these structures provide clues on how to exploit the longer inhibitor substituents that extend out of the active site pocket for isoform-selective inhibitor design.

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Primary Citation of related structures