1N2N

Crystal structure of cyanide complex of the oxygenase domain of inducible nitric oxide synthase.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Crystal structures of cyanide complexes of P450cam and the oxygenase domain of inducible nitric oxide synthase-structural models of the short-lived oxygen complexes

Fedorov, R.Ghosh, D.K.Schlichting, I.

(2003) Arch Biochem Biophys 409: 25-31

  • DOI: https://doi.org/10.1016/s0003-9861(02)00555-6
  • Primary Citation of Related Structures:  
    1N2N, 1O76

  • PubMed Abstract: 

    The crystal structure of the ternary cyanide complex of P450cam and camphor was determined to 1.8A resolution and found to be identical with the structure of the active oxygen complex [I. Schlichting et al., 2000, Science 287, 1615]. Notably, cyanide binds in a bent mode and induces the active conformation that is characterized by the presence of two water molecules and a flip of the carbonyl of the conserved Asp251. The structure of the ternary complex of cyanide, L-arginine, and the oxygenase domain of inducible nitric oxide synthase was determined to 2.4A resolution. Cyanide binds essentially linearly, interacts with L-Arg, and induces the binding of a water molecule at the active site. This water is positioned by backbone interactions, located 2.8A from the nitrogen atom of cyanide, and could provide a proton required for O-O bond scission in the hydroxylation reaction of nitric oxide synthase.


  • Organizational Affiliation

    Abt. Biophysikalische Chemie, Max Planck Institut für Molekulare Physiologie, Otto Hahn Strasse 11, 44227 Dortmund, Germany.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Inducible Nitric Oxide Synthase
A, B
419Mus musculusMutation(s): 0 
EC: 1.14.13.39
UniProt & NIH Common Fund Data Resources
Find proteins for P29477 (Mus musculus)
Explore P29477 
Go to UniProtKB:  P29477
IMPC:  MGI:97361
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29477
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
E [auth A],
I [auth B]
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
H4B
Query on H4B

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F [auth A],
J [auth B]
5,6,7,8-TETRAHYDROBIOPTERIN
C9 H15 N5 O3
FNKQXYHWGSIFBK-RPDRRWSUSA-N
ARG
Query on ARG

Download Ideal Coordinates CCD File 
G [auth A],
K [auth B]
ARGININE
C6 H15 N4 O2
ODKSFYDXXFIFQN-BYPYZUCNSA-O
ZN
Query on ZN

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D [auth A],
H [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
CYN
Query on CYN

Download Ideal Coordinates CCD File 
C [auth A]CYANIDE ION
C N
XFXPMWWXUTWYJX-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.208 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 214.8α = 90
b = 214.8β = 90
c = 117.6γ = 120
Software Package:
Software NamePurpose
ProDCdata collection
XDSdata reduction
AMoREphasing
CNSrefinement
XDSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-02-11
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description