2QBN

Crystal structure of ferric G248V cytochrome P450cam


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Alteration of P450 Distal Pocket Solvent Leads to Impaired Proton Delivery and Changes in Heme Geometry.

Makris, T.M.Koenig, K.V.Schlichting, I.Sligar, S.G.

(2007) Biochemistry 46: 14129-14140

  • DOI: 10.1021/bi7013695
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Distal pocket water molecules have been widely implicated in the delivery of protons required in O-O bond heterolysis in the P450 reaction cycle. Targeted dehydration of the cytochrome P450cam (CYP101) distal pocket through mutagenesis of a distal po ...

    Distal pocket water molecules have been widely implicated in the delivery of protons required in O-O bond heterolysis in the P450 reaction cycle. Targeted dehydration of the cytochrome P450cam (CYP101) distal pocket through mutagenesis of a distal pocket glycine to either valine or threonine results in the alteration of spin state equilibria, and has dramatic consequences on the catalytic rate, coupling efficiency, and kinetic solvent isotope effect parameters, highlighting an important role of the active-site hydration level on P450 catalysis. Cryoradiolysis of the mutant CYP101 oxyferrous complexes further indicates a specific perturbation of proton-transfer events required for the transformation of ferric-peroxo to ferric-hydroperoxo states. Finally, crystallography of the 248Val and 248Thr mutants in both the ferric camphor bound resting state and ferric-cyano adducts shows both the alteration of hydrogen-bonding networks and the alteration of heme geometry parameters. Taken together, these results indicate that the distal pocket microenvironment governs the transformation of reactive heme-oxygen intermediates in P450 cytochromes.


    Organizational Affiliation

    Department of Biochemistry, University of Illinois Urbana-Champaign, Urbana, Illinois 61801, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytochrome P450-cam
A
421Pseudomonas putidaMutation(s): 1 
Gene Names: camC (cyp101)
EC: 1.14.15.1
Find proteins for P00183 (Pseudomonas putida)
Go to UniProtKB:  P00183
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
CAM
Query on CAM

Download SDF File 
Download CCD File 
A
CAMPHOR
C10 H16 O
DSSYKIVIOFKYAU-XCBNKYQSSA-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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.196 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 63.920α = 90.00
b = 63.920β = 90.00
c = 242.140γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
MAR345data collection
CNSphasing
XDSdata reduction
CNSrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-10-18
    Type: Refinement description