4IMT

Structure of rat neuronal nitric oxide synthase in complex with 6,6'-((4-(3-aminopropyl)-1,3-phenylene)bis(ethane-2,1-diyl))bis(4-methylpyridin-2-amine)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure-guided design of selective inhibitors of neuronal nitric oxide synthase.

Huang, H.Li, H.Martasek, P.Roman, L.J.Poulos, T.L.Silverman, R.B.

(2013) J.Med.Chem. 56: 3024-3032

  • DOI: 10.1021/jm4000984
  • Primary Citation of Related Structures:  4IMS, 4IMU, 4IMW, 4IMX

  • PubMed Abstract: 
  • Nitric oxide synthases (NOSs) comprise three closely related isoforms that catalyze the oxidation of L-arginine to L-citrulline and the important second messenger nitric oxide (NO). Pharmacological selective inhibition of neuronal NOS (nNOS) has the ...

    Nitric oxide synthases (NOSs) comprise three closely related isoforms that catalyze the oxidation of L-arginine to L-citrulline and the important second messenger nitric oxide (NO). Pharmacological selective inhibition of neuronal NOS (nNOS) has the potential to be therapeutically beneficial in various neurodegenerative diseases. Here, we present a structure-guided, selective nNOS inhibitor design based on the crystal structure of lead compound 1 in nNOS. The best inhibitor, 7, exhibited low nanomolar inhibitory potency and good isoform selectivities (nNOS over eNOS and iNOS are 472-fold and 239-fold, respectively). Consistent with the good selectivity, 7 binds to nNOS and eNOS with different binding modes. The distinctly different binding modes of 7, driven by the critical residue Asp597 in nNOS, offers compelling insight to explain its isozyme selectivity, which should guide future drug design programs.


    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nitric oxide synthase, brain
A, B
422Rattus norvegicusGene Names: Nos1 (Bnos)
EC: 1.14.13.39
Find proteins for P29476 (Rattus norvegicus)
Go to UniProtKB:  P29476
Small Molecules
Ligands 5 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
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
1EW
Query on 1EW

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Download CCD File 
A, B
6,6'-{[4-(3-aminopropyl)benzene-1,3-diyl]diethane-2,1-diyl}bis(4-methylpyridin-2-amine)
C25 H33 N5
KSYDDSWEHNSQGZ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1EWKi: 110 nM (100) BINDINGDB
BH4Kd: 1120 nM (96) BINDINGDB
1EWKi: 110 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 51.658α = 90.00
b = 110.723β = 90.00
c = 163.713γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
Blu-Icedata collection
HKL-2000data reduction
REFMACphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-01-03 
  • Released Date: 2013-04-24 
  • Deposition Author(s): Li, H., Poulos, T.L.

Revision History 

  • Version 1.0: 2013-04-24
    Type: Initial release
  • Version 1.1: 2014-04-23
    Type: Structure summary
  • Version 1.2: 2017-11-15
    Type: Refinement description