1FAH

STRUCTURE OF CYTOCHROME P450


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 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


  • 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.,Sect.D 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYTOCHROME P450 BM-3
A, B
471Bacillus megaterium (strain ATCC 14581 / DSM 32 / JCM 2506 / NBRC 15308 / NCIMB 9376 / NCTC 10342 / VKM B-512)Mutation(s): 1 
Gene Names: cyp102A1 (cyp102)
Find proteins for P14779 (Bacillus megaterium (strain ATCC 14581 / DSM 32 / JCM 2506 / NBRC 15308 / NCIMB 9376 / NCTC 10342 / VKM B-512))
Go to UniProtKB:  P14779
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Work: 0.172 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 59.500α = 90.00
b = 154.000β = 95.00
c = 62.400γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
XENGENdata reduction
XENGENdata scaling
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



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
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-07
    Type: Data collection, Other
  • Version 1.4: 2018-05-02
    Type: Data collection