1FAH

STRUCTURE OF CYTOCHROME P450


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.172 
  • R-Value Observed: 0.172 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

The role of Thr268 in oxygen activation of cytochrome P450BM-3.

Yeom, H.Sligar, S.G.Li, H.Poulos, T.L.Fulco, A.J.

(1995) Biochemistry 34: 14733-14740

  • DOI: 10.1021/bi00045a014
  • Primary Citation of Related Structures:  
    1FAH

  • PubMed Abstract: 
  • Cytochrome P450BM-3, a catalytically self-sufficient monooxygenase from Bacillus megaterium, catalyzes the omega-n (n = 1-3) hydroxylation of fatty acids in the presence of O2 and NADPH. Like most other P450s, cytochrome P450BM-3 contains a threonine ...

    Cytochrome P450BM-3, a catalytically self-sufficient monooxygenase from Bacillus megaterium, catalyzes the omega-n (n = 1-3) hydroxylation of fatty acids in the presence of O2 and NADPH. Like most other P450s, cytochrome P450BM-3 contains a threonine residue (Thr268) in the distal I helix thought to be important for O2 binding and activation. Thr268 has been converted to alanine and the enzymatic properties and heme domain crystal structure determined. Using sodium laurate as the substrate, the mutant exhibited slower rates of O2 and NADPH consumption. In addition, electron transfer is uncoupled from substrate hydroxylation as evidenced by the greater production of water and peroxide in the mutant compared to the wild-type enzyme. The crystal structure of the mutant reveals that the only changes in structure are confined to the site of mutation. These data indicate an important role for Thr268 in O2 binding and activation in the metabolism of sodium laurate by cytochrome P450BM-3.


    Related Citations: 
    • Modeling Protein-Substrate Interactions in the Heme Domain of Cytochrome P450Bm-3
      Li, H.Y., Poulos, T.L.
      (1995) Acta Crystallogr D Biol Crystallogr 51: 21
    • Crystal Structure of Hemoprotein Domain of P450Bm-3, a Prototype for Microsomal P450'S
      Ravichandran, K.G., Boddupalli, S.S., Hasemann, C.A., Peterson, J.A., Deisenhofer, J.
      (1993) Science 261: 731

    Organizational Affiliation

    Beckman Institute for Advanced Science and Technology, University of Illinois, Urbana 61801, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYTOCHROME P450 BM-3A, B471Bacillus megateriumMutation(s): 1 
EC: 1.14.14.1 (PDB Primary Data), 1.6.2.4 (UniProt)
Find proteins for P14779 (Bacillus megaterium (strain ATCC 14581 / DSM 32 / JCM 2506 / NBRC 15308 / NCIMB 9376 / NCTC 10342 / VKM B-512))
Explore P14779 
Go to UniProtKB:  P14779
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.172 
  • R-Value Observed: 0.172 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.5α = 90
b = 154β = 95
c = 62.4γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XENGENdata reduction
XENGENdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 1996-08-01 
  • Released Date: 1997-02-12 
  • Deposition Author(s): Li, H.Y., Poulos, T.L.

Revision History 

  • Version 1.0: 1997-02-12
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-07
    Changes: Data collection, Other
  • Version 1.4: 2018-05-02
    Changes: Data collection