6POU

Structure of human endothelial nitric oxide synthase heme domain in complex with 7-(4-(2-Aminoethyl)phenyl)-4-methylquinolin-2-amine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 

Starting Model: experimental
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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, E
A, B, C, D, E, F
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
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
AA [auth C]
CB [auth F]
G [auth A]
KA [auth D]
Q [auth B]
AA [auth C],
CB [auth F],
G [auth A],
KA [auth D],
Q [auth B],
TA [auth E]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
M16 (Subject of Investigation/LOI)
Query on M16

Download Ideal Coordinates CCD File 
BA [auth C]
BB [auth F]
CA [auth C]
DB [auth F]
EB [auth F]
BA [auth C],
BB [auth F],
CA [auth C],
DB [auth F],
EB [auth F],
H [auth A],
I [auth A],
LA [auth D],
MA [auth D],
R [auth B],
S [auth B],
UA [auth E]
7-[4-(2-aminoethyl)phenyl]-4-methylquinolin-2-amine
C18 H19 N3
JQIPWXPQEFGIOD-UHFFFAOYSA-N
BTB
Query on BTB

Download Ideal Coordinates CCD File 
DA [auth C]
EA [auth C]
FA [auth C]
FB [auth F]
GB [auth F]
DA [auth C],
EA [auth C],
FA [auth C],
FB [auth F],
GB [auth F],
J [auth A],
K [auth A],
NA [auth D],
O [auth A],
OA [auth D],
PA [auth D],
T [auth B],
U [auth B],
V [auth B],
VA [auth E],
W [auth B],
WA [auth E],
XA [auth E]
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 
HB [auth F]
IA [auth C]
M [auth A]
N [auth A]
QA [auth D]
HB [auth F],
IA [auth C],
M [auth A],
N [auth A],
QA [auth D],
RA [auth D],
X [auth B],
Y [auth B]
GADOLINIUM ATOM
Gd
UIWYJDYFSGRHKR-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
HA [auth C],
ZA [auth E]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
AB [auth E]
GA [auth C]
IB [auth F]
JA [auth C]
L [auth A]
AB [auth E],
GA [auth C],
IB [auth F],
JA [auth C],
L [auth A],
P [auth A],
SA [auth D],
YA [auth E],
Z [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.923α = 90
b = 153.549β = 90
c = 175.089γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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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