6POX

Structure of human endothelialnitric oxide synthase heme domain in complex with 7-(3-(Aminomethyl)-4-ethoxyphenyl)-4-methylquinolin-2-amine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

First Contact: 7-Phenyl-2-Aminoquinolines, Potent and Selective Neuronal Nitric Oxide Synthase Inhibitors That Target an Isoform-Specific Aspartate.

Cinelli, M.A.Reidl, C.T.Li, H.Chreifi, G.Poulos, T.L.Silverman, R.B.

(2020) J Med Chem 63: 4528-4554

  • DOI: https://doi.org/10.1021/acs.jmedchem.9b01573
  • Primary Citation of Related Structures:  
    6PMV, 6PMW, 6PMX, 6PMY, 6PMZ, 6PN0, 6PN1, 6PN2, 6PN3, 6PN4, 6PN5, 6PN6, 6PN7, 6PN8, 6PN9, 6PNA, 6PNB, 6PNC, 6PND, 6PNE, 6PNF, 6PNG, 6PNH, 6PO5, 6PO7, 6PO8, 6PO9, 6POA, 6POB, 6POC, 6POT, 6POU, 6POV, 6POW, 6POX, 6POY, 6POZ, 6PP0, 6PP1, 6PP2, 6PP3, 6PP4

  • PubMed Abstract: 

    Inhibition of neuronal nitric oxide synthase (nNOS), an enzyme implicated in neurodegenerative disorders, is an attractive strategy for treating or preventing these diseases. We previously developed several classes of 2-aminoquinoline-based nNOS inhibitors, but these compounds had drawbacks including off-target promiscuity, low activity against human nNOS, and only modest selectivity for nNOS over related enzymes. In this study, we synthesized new nNOS inhibitors based on 7-phenyl-2-aminoquinoline and assayed them against rat and human nNOS, human eNOS, and murine and (in some cases) human iNOS. Compounds with a meta -relationship between the aminoquinoline and a positively charged tail moiety were potent and had up to nearly 900-fold selectivity for human nNOS over human eNOS. X-ray crystallography indicates that the amino groups of some compounds occupy a water-filled pocket surrounding an nNOS-specific aspartate residue (absent in eNOS). This interaction was confirmed by mutagenesis studies, making 7-phenyl-2-aminoquinolines the first aminoquinolines to interact with this residue.


  • Organizational Affiliation

    Department of Chemistry, Department of 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Nitric oxide synthase, endothelial
A, B, C, D
440Homo sapiensMutation(s): 1 
Gene Names: NOS3
EC: 1.14.13.39
UniProt & NIH Common Fund Data Resources
Find proteins for P29474 (Homo sapiens)
Explore P29474 
Go to UniProtKB:  P29474
PHAROS:  P29474
GTEx:  ENSG00000164867 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29474
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 8 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
E [auth A],
HA [auth D],
P [auth B],
Y [auth C]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
OSJ (Subject of Investigation/LOI)
Query on OSJ

Download Ideal Coordinates CCD File 
AA [auth C],
G [auth A],
JA [auth D],
R [auth B]
7-[3-(aminomethyl)-4-ethoxyphenyl]-4-methylquinolin-2-amine
C19 H21 N3 O
AGWWSGQCTLAMKS-UHFFFAOYSA-N
H4B
Query on H4B

Download Ideal Coordinates CCD File 
F [auth A],
IA [auth D],
Q [auth B],
Z [auth C]
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
BTB
Query on BTB

Download Ideal Coordinates CCD File 
BA [auth C]
CA [auth C]
H [auth A]
I [auth A]
J [auth A]
BA [auth C],
CA [auth C],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
KA [auth D],
LA [auth D],
S [auth B],
T [auth B],
U [auth B],
X [auth B]
2-[BIS-(2-HYDROXY-ETHYL)-AMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C8 H19 N O5
OWMVSZAMULFTJU-UHFFFAOYSA-N
GD
Query on GD

Download Ideal Coordinates CCD File 
GA [auth C],
NA [auth D],
O [auth A],
W [auth B]
GADOLINIUM ATOM
Gd
UIWYJDYFSGRHKR-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
EA [auth C],
M [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
DA [auth C],
L [auth A]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
FA [auth C],
MA [auth D],
N [auth A],
V [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.716α = 90
b = 152.572β = 90.89
c = 108.711γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesGM57353

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-29
    Type: Initial release
  • Version 1.1: 2020-05-27
    Changes: Database references
  • Version 1.2: 2023-10-11
    Changes: Data collection, Database references, Derived calculations, Refinement description