1FOI

BOVINE ENDOTHELIAL NITRIC OXIDE SYNTHASE HEME DOMAIN COMPLEXED WITH 1400W(H4B-FREE)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Crystallographic studies on endothelial nitric oxide synthase complexed with nitric oxide and mechanism-based inhibitors.

Li, H.Raman, C.S.Martasek, P.Masters, B.S.Poulos, T.L.

(2001) Biochemistry 40: 5399-5406

  • DOI: https://doi.org/10.1021/bi002658v
  • Primary Citation of Related Structures:  
    1ED6, 1FOI, 1FOL, 1FOO, 1FOP

  • PubMed Abstract: 

    The crystal structure of the endothelial nitric oxide synthase (NOS) heme domain complexed with NO reveals close hydrogen bonding interactions between NO and the terminal guanidino nitrogen of the substrate, L-arginine. Dioxygen is expected to bind in a similar mode which will facilitate proton abstraction from L-Arg to dioxygen, a required step for O-O bond cleavage. Structures of mechanism-based NOS inhibitors, N(5)-(1-iminoethyl)-L-ornithine and N-(3-(aminomethyl)benzyl)acetamidine, provide clues on how this class of compounds operate as suicide substrate inhibitors leading to heme oxidation.


  • Organizational Affiliation

    Departments of Molecular Biology & Biochemistry and Physiology & Biophysics and Program in Macromolecular Structure, University of California, Irvine 92697-3900, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NITRIC-OXIDE SYNTHASE
A, B
444Bos taurusMutation(s): 0 
EC: 1.14.13.39
UniProt
Find proteins for P29473 (Bos taurus)
Explore P29473 
Go to UniProtKB:  P29473
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29473
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
F [auth A],
K [auth B]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
14W
Query on 14W

Download Ideal Coordinates CCD File 
G [auth A],
L [auth B]
N-(3-(AMINOMETHYL)BENZYL)ACETAMIDINE
C10 H15 N3
RODUKNYOEVZQPR-UHFFFAOYSA-N
CAC
Query on CAC

Download Ideal Coordinates CCD File 
D [auth A],
J [auth B]
CACODYLATE ION
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
GOL
Query on GOL

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

Download Ideal Coordinates CCD File 
E [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACT
Query on ACT

Download Ideal Coordinates CCD File 
C [auth A],
I [auth B]
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
Binding Affinity Annotations 
IDSourceBinding Affinity
14W BindingDB:  1FOI Ki: 7.50e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.222 
  • R-Value Observed: 0.222 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.191α = 90
b = 106.645β = 90
c = 156.3γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-07-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references, Derived calculations