4NOS

HUMAN INDUCIBLE NITRIC OXIDE SYNTHASE WITH INHIBITOR

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural characterization of nitric oxide synthase isoforms reveals striking active-site conservation.

Fischmann, T.O., Hruza, A., Niu, X.D., Fossetta, J.D., Lunn, C.A., Dolphin, E., Prongay, A.J., Reichert, P., Lundell, D.J., Narula, S.K., Weber, P.C.

(1999) Nat.Struct.Mol.Biol. 6: 233-242

  • DOI: 10.1038/6675
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Crystal structures of human endothelial nitric oxide synthase (eNOS) and human inducible NOS (iNOS) catalytic domains were solved in complex with the arginine substrate and an inhibitor S-ethylisothiourea (SEITU), respectively. The small molecules bi ...

    Crystal structures of human endothelial nitric oxide synthase (eNOS) and human inducible NOS (iNOS) catalytic domains were solved in complex with the arginine substrate and an inhibitor S-ethylisothiourea (SEITU), respectively. The small molecules bind in a narrow cleft within the larger active-site cavity containing heme and tetrahydrobiopterin. Both are hydrogen-bonded to a conserved glutamate (eNOS E361, iNOS E377). The active-site residues of iNOS and eNOS are nearly identical. Nevertheless, structural comparisons provide a basis for design of isozyme-selective inhibitors. The high-resolution, refined structures of eNOS (2.4 A resolution) and iNOS (2.25 A resolution) reveal an unexpected structural zinc situated at the intermolecular interface and coordinated by four cysteines, two from each monomer.

    Organizational Affiliation: 

    Structural Chemistry Department, Schering-Plough Research Institute, Kenilworth, New Jersey 07033, USA. thierry.fischmann@spcorp.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INDUCIBLE NITRIC OXIDE SYNTHASE
A, B, C, D
427Homo sapiensMutation(s): 0 
Gene Names: NOS2 (NOS2A)
EC: 1.14.13.39
Find proteins for P35228 (Homo sapiens)
Go to Gene View: NOS2
Go to UniProtKB:  P35228
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
H2B
Query on H2B
Download SDF File 
Download CCD File 
A
2-AMINO-6-(1,2-DIHYDROXY-PROPYL)-7,8-DIHYDRO-6H-PTERIDIN-4-ONE
QUINONOID 7,8-TETRAHYDROBIOPTERIN
C9 H13 N5 O3
ZHQJVZLJDXWFFX-RPDRRWSUSA-N
 Ligand Interaction
ZN
Query on ZN
Download SDF File 
Download CCD File 
A, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM
Download SDF File 
Download CCD File 
A, B, C, D
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
ITU
Query on ITU
Download SDF File 
Download CCD File 
A, B, C, D
ETHYLISOTHIOUREA
C3 H8 N2 S
VFIZBHJTOHUOEK-UHFFFAOYSA-N
 Ligand Interaction
H4B
Query on H4B
Download SDF File 
Download CCD File 
B, C, D
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
ITUIC50: 160 nM (99) BINDINGDB
ITUKi: 5.2 nM (87) BINDINGDB
ITUKi: 19 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 89.759α = 90.00
b = 156.672β = 90.00
c = 190.044γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
CCP4data scaling
SHARPphasing
SOLOMONphasing
DENZOdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-02-04
    Type: Initial release
  • Version 1.1: 2007-10-16
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance