1F26

CRYSTAL STRUCTURE OF NO COMPLEX OF THR243VAL MUTANTS OF CYTOCHROME P450NOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 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

  • DOI: 10.1016/s0162-0134(00)00161-6
  • Primary Citation of Related Structures:  
    1F24, 1F26, 1F25

  • 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: 
    • 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 1997
      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
    • 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 Biol 4: 827

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
NITRIC OXIDE REDUCTASEA402Fusarium oxysporumMutation(s): 1 
Gene Names: CYP55A1CYP55
EC: 1.7.99.7 (PDB Primary Data), 1.7.1.14 (UniProt)
Find proteins for P23295 (Fusarium oxysporum)
Explore P23295 
Go to UniProtKB:  P23295
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
NO
Query on NO

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.139 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.567α = 90
b = 81.938β = 90
c = 85.528γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
SHELXL-97refinement
MOSFLMdata reduction
CCP4data scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-11-23
    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