4CAR

Structure of bovine endothelial nitric oxide synthase heme domain in complex with 7-((3-Fluorophenethylamino)methyl)quinolin-2-amine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.154 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Simplified 2-Aminoquinoline-Based Scaffold for Potent and Selective Neuronal Nitric Oxide Synthase Inhibition.

Cinelli, M.A.Li, H.Chreifi, G.Martasek, P.Roman, L.J.Poulos, T.L.Silverman, R.B.

(2014) J.Med.Chem. 57: 1513

  • DOI: 10.1021/jm401838x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Since high levels of nitric oxide (NO) are implicated in neurodegenerative disorders, inhibition of the neuronal isoform of nitric oxide synthase (nNOS) and reduction of NO levels are therapeutically desirable. Nonetheless, many nNOS inhibitors mimic ...

    Since high levels of nitric oxide (NO) are implicated in neurodegenerative disorders, inhibition of the neuronal isoform of nitric oxide synthase (nNOS) and reduction of NO levels are therapeutically desirable. Nonetheless, many nNOS inhibitors mimic l-arginine and are poorly bioavailable. 2-Aminoquinoline-based scaffolds were designed with the hope that they could (a) mimic aminopyridines as potent, isoform-selective arginine isosteres and (b) possess chemical properties more conducive to oral bioavailability and CNS penetration. A series of these compounds was synthesized and assayed against purified nNOS enzymes, endothelial NOS (eNOS), and inducible NOS (iNOS). Several compounds built on a 7-substituted 2-aminoquinoline core are potent and isoform-selective; X-ray crystallography indicates that aminoquinolines exert inhibitory effects by mimicking substrate interactions with the conserved active site glutamate residue. The most potent and selective compounds, 7 and 15, were tested in a Caco-2 assay and showed good permeability and low efflux, suggesting high potential for oral bioavailability.


    Organizational Affiliation

    Departments of Chemistry and Molecular Biosciences, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NITRIC OXIDE SYNTHASE, ENDOTHELIAL
A, B
443Bos taurusMutation(s): 0 
Gene Names: NOS3
EC: 1.14.13.39
Find proteins for P29473 (Bos taurus)
Go to Gene View: NOS3
Go to UniProtKB:  P29473
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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

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Download CCD File 
A, B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
M87
Query on M87

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Download CCD File 
A, B
7-[[2-(3-fluorophenyl)ethylamino]methyl]quinolin-2-amine
C18 H18 F N3
YXSBPQQVHVXHJN-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

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Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
H4B
Query on H4B

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Download CCD File 
A, B
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CAS
Query on CAS
A, B
L-PEPTIDE LINKINGC5 H12 As N O2 SCYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
M87Ki: 485 nM (99) BINDINGDB
M87Ki: 485 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.154 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 57.760α = 90.00
b = 106.299β = 90.00
c = 156.676γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-10-08 
  • Released Date: 2014-02-19 
  • Deposition Author(s): Li, H., Poulos, T.L.

Revision History 

  • Version 1.0: 2014-02-19
    Type: Initial release
  • Version 1.1: 2014-03-12
    Type: Database references