3E65

Murine INOS dimer with HEME, pterin and inhibitor AR-C120011


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.249 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Anchored plasticity opens doors for selective inhibitor design in nitric oxide synthase.

Garcin, E.D.Arvai, A.S.Rosenfeld, R.J.Kroeger, M.D.Crane, B.R.Andersson, G.Andrews, G.Hamley, P.J.Mallinder, P.R.Nicholls, D.J.St-Gallay, S.A.Tinker, A.C.Gensmantel, N.P.Mete, A.Cheshire, D.R.Connolly, S.Stuehr, D.J.Aberg, A.Wallace, A.V.Tainer, J.A.Getzoff, E.D.

(2008) Nat.Chem.Biol. 4: 700-707

  • DOI: 10.1038/nchembio.115
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Nitric oxide synthase (NOS) enzymes synthesize nitric oxide, a signal for vasodilatation and neurotransmission at low concentrations and a defensive cytotoxin at higher concentrations. The high active site conservation among all three NOS isozymes hi ...

    Nitric oxide synthase (NOS) enzymes synthesize nitric oxide, a signal for vasodilatation and neurotransmission at low concentrations and a defensive cytotoxin at higher concentrations. The high active site conservation among all three NOS isozymes hinders the design of selective NOS inhibitors to treat inflammation, arthritis, stroke, septic shock and cancer. Our crystal structures and mutagenesis results identified an isozyme-specific induced-fit binding mode linking a cascade of conformational changes to a new specificity pocket. Plasticity of an isozyme-specific triad of distant second- and third-shell residues modulates conformational changes of invariant first-shell residues to determine inhibitor selectivity. To design potent and selective NOS inhibitors, we developed the anchored plasticity approach: anchor an inhibitor core in a conserved binding pocket, then extend rigid bulky substituents toward remote specificity pockets, which become accessible upon conformational changes of flexible residues. This approach exemplifies general principles for the design of selective enzyme inhibitors that overcome strong active site conservation.


    Organizational Affiliation

    The Scripps Research Institute, Department of Molecular Biology and Skaggs Institute for Chemical Biology, 10550 North Torrey Pines Road, MB4, La Jolla, California 92037, USA. egarcin@umbc.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nitric oxide synthase, inducible
A, B
433Mus musculusMutation(s): 0 
Gene Names: Nos2 (Inosl)
EC: 1.14.13.39
Find proteins for P29477 (Mus musculus)
Go to UniProtKB:  P29477
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
XXZ
Query on XXZ

Download SDF File 
Download CCD File 
A, B
1-[4-(AMINOMETHYL)BENZOYL]-5'-FLUORO-1'H-SPIRO[PIPERIDINE-4,2'-QUINAZOLIN]-4'-AMINE
AR-C120011
C20 H22 F N5 O
SFPCNWQWKOUNRT-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

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

Download SDF File 
Download CCD File 
A, B
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
XXZIC50: 130 nM (85) BINDINGDB
XXZIC50: 130 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.249 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 213.935α = 90.00
b = 213.935β = 90.00
c = 117.025γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
HKL-2000data reduction
CNSphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-10-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description