4D31

Structure of rat neuronal nitric oxide synthase heme domain in complex with 2-(2-(1H-imidazol-1-yl)pyrimidin-4-yl)-N-(3-cyanobenzyl) ethan-1-amine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Novel 2,4-Disubstituted Pyrimidines as Potent, Selective, and Cell-Permeable Inhibitors of Neuronal Nitric Oxide Synthase.

Mukherjee, P.Li, H.Sevrioukova, I.Chreifi, G.Martasek, P.Roman, L.J.Poulos, T.L.Silverman, R.B.

(2015) J Med Chem 58: 1067

  • DOI: 10.1021/jm501719e
  • Primary Citation of Related Structures:  
    4D2Z, 4D3A, 4D3B, 4D33, 4D34, 4D35, 4D36, 4D37, 4D38, 4D39

  • PubMed Abstract: 
  • Selective inhibition of neuronal nitric oxide synthase (nNOS) is an important therapeutic approach to target neurodegenerative disorders. However, the majority of the nNOS inhibitors developed are arginine mimetics and, therefore, suffer from poor bioavailability ...

    Selective inhibition of neuronal nitric oxide synthase (nNOS) is an important therapeutic approach to target neurodegenerative disorders. However, the majority of the nNOS inhibitors developed are arginine mimetics and, therefore, suffer from poor bioavailability. We designed a novel strategy to combine a more pharmacokinetically favorable 2-imidazolylpyrimidine head with promising structural components from previous inhibitors. In conjunction with extensive structure-activity studies, several highly potent and selective inhibitors of nNOS were discovered. X-ray crystallographic analysis reveals that these type II inhibitors utilize the same hydrophobic pocket to gain strong inhibitory potency (13), as well as high isoform selectivity. Interestingly, select compounds from this series (9) showed good permeability and low efflux in a Caco-2 assay, suggesting potential oral bioavailability, and exhibited minimal off-target binding to 50 central nervous system receptors. Furthermore, even with heme-coordinating groups in the molecule, modifying other pharmacophoric fragments minimized undesirable inhibition of cytochrome P450s from human liver microsomes.


    Organizational Affiliation

    Department of Chemistry, Department of Molecular Biosciences, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, Northwestern University , Evanston, Illinois 60208-3113, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NITRIC OXIDE SYNTHASE, BRAINAB422Rattus norvegicusMutation(s): 0 
Gene Names: Nos1Bnos
EC: 1.14.13.39
Find proteins for P29476 (Rattus norvegicus)
Explore P29476 
Go to UniProtKB:  P29476
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
OLW
Query on OLW

Download CCD File 
A, B
3-[({2-[2-(1H-imidazol-1-yl)pyrimidin-4-yl]ethyl}amino)methyl]benzonitrile
C17 H16 N6
ODSRQJVZWSSZFG-UHFFFAOYSA-N
 Ligand Interaction
H4B
Query on H4B

Download CCD File 
A, B
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
OLWKi:  183   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.969α = 90
b = 111.385β = 90
c = 164.841γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2014-10-20 
  • Released Date: 2014-12-24 
  • Deposition Author(s): Li, H., Poulos, T.L.

Revision History 

  • Version 1.0: 2014-12-24
    Type: Initial release
  • Version 1.1: 2015-03-04
    Changes: Database references