1F24

CRYSTAL STRUCTURE OF NO COMPLEX OF THR243ALA MUTANTS OF CYTOCHROME P450NOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.139 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Mutation effects of a conserved threonine (Thr243) of cytochrome P450nor on its structure and function.

Obayashi, E.Shimizu, H.Park, S.Y.Shoun, H.Shiro, Y.

(2000) J.Inorg.Biochem. 82: 103-111

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Threonine 243 of cytochrome P450nor (fungal nitric oxide reductase) corresponds to the 'conserved' Thr in the long I helix of monooxygenase cytochrome P450s. In P450nor, the replacement of Thr243 with Asn, Ala or Val makes the enzymatic activity dram ...

    Threonine 243 of cytochrome P450nor (fungal nitric oxide reductase) corresponds to the 'conserved' Thr in the long I helix of monooxygenase cytochrome P450s. In P450nor, the replacement of Thr243 with Asn, Ala or Val makes the enzymatic activity dramatically reduce. In order to understand the roles of Thr243 in the reduction reaction of NO by P450nor, the crystal structures of three Thr243 mutants (Thr243-->Asn, Thr243-->Val, Thr243-->Ala) of P450nor were determined at a 1.4-A resolution and at cryogenic temperature. However, the hydrogen-bonding pattern in the heme pocket of these mutants is essentially similar for that of the WT enzyme. This suggests that the determination of the structure of the NADH complex of P450nor is required, in order to evaluate the role of Thr243 in its enzymatic reaction. We attempted to crystallize the NADH complex under several conditions, but have not yet been successful.


    Related Citations: 
    • Crystal structure of nitric oxide reductase from denitrifying fungus Fusarium oxysporum
      PARK, S.-Y.,Shimizu, H.,Adachi, S.,Nakagawa, A.,Tanaka, I.,Nakahara, K.,Shoun, H.,Obayashi, E.,Nakamura, H.,Iizuka, T.,Shiro, Y.
      (1997) Nat.Struct.Mol.Biol. 4: 827
    • Proton delivery in NO reduction by fungal nitric-oxide reductase. Cryogenic crystallography, spectroscopy, and kinetics of ferric-no complexes of wild-type and mutant enzymes
      Shimizu, H.,Obayashi, E.,Gomi, Y.,Arakawa, H.,Park, S.-Y.,Nakamura, H.,Adachi, S.,Shoun, H.,Shiro, Y.
      (2000) J.Biol.Chem. 275: 4816


    Organizational Affiliation

    RIKEN Harima Institute/SPring-8, Sayo, Hyogo, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NITRIC OXIDE REDUCTASE
A
402Fusarium oxysporumMutation(s): 1 
Gene Names: CYP55A1 (CYP55)
EC: 1.7.1.14
Find proteins for P23295 (Fusarium oxysporum)
Go to UniProtKB:  P23295
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

Download SDF File 
Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
NO
Query on NO

Download SDF File 
Download CCD File 
A
NITRIC OXIDE
Nitrogen monoxide
N O
ODUCDPQEXGNKDN-UHFFFAOYAM
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.4 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.139 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.578α = 90.00
b = 81.761β = 90.00
c = 85.635γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
X-PLORmodel building
X-PLORphasing
SHELXL-97refinement
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-11-23
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance