3FWI

Ferric camphor bound Cytochrome P450cam containing a selenocysteine as the 5th heme ligand, tetragonal crystal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Probing the role of the proximal heme ligand in cytochrome P450cam by recombinant incorporation of selenocysteine.

Aldag, C.Gromov, I.A.Garcia-Rubio, I.von Koenig, K.Schlichting, I.Jaun, B.Hilvert, D.

(2009) Proc.Natl.Acad.Sci.USA 106: 5481-5486

  • DOI: 10.1073/pnas.0810503106
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The unique monooxygenase activity of cytochrome P450cam has been attributed to coordination of a cysteine thiolate to the heme cofactor. To investigate this interaction, we replaced cysteine with the more electron-donating selenocysteine. Good yields ...

    The unique monooxygenase activity of cytochrome P450cam has been attributed to coordination of a cysteine thiolate to the heme cofactor. To investigate this interaction, we replaced cysteine with the more electron-donating selenocysteine. Good yields of the selenoenzyme were obtained by bacterial expression of an engineered gene containing the requisite UGA codon for selenocysteine and a simplified yet functional selenocysteine insertion sequence (SECIS). The sulfur-to-selenium substitution subtly modulates the structural, electronic, and catalytic properties of the enzyme. Catalytic activity decreases only 2-fold, whereas substrate oxidation becomes partially uncoupled from electron transfer, implying a more complex role for the axial ligand than generally assumed.


    Organizational Affiliation

    Laboratory of Organic Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Camphor 5-monooxygenase
A
405Pseudomonas putidaMutation(s): 3 
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

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A
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
CAM
Query on CAM

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Download CCD File 
A
CAMPHOR
C10 H16 O
DSSYKIVIOFKYAU-XCBNKYQSSA-N
 Ligand Interaction
HEM
Query on HEM

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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: 2.4 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.176 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 63.580α = 90.00
b = 63.580β = 90.00
c = 243.140γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
XDSdata reduction
REFMACrefinement
MAR345data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-03-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-04-09
    Type: Other
  • Version 1.3: 2014-08-06
    Type: Other
  • Version 1.4: 2017-11-01
    Type: Refinement description