3CPP

CRYSTAL STRUCTURE OF THE CARBON MONOXY-SUBSTRATE-CYTOCHROME P450-CAM TERNARY COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the carbon monoxide-substrate-cytochrome P-450CAM ternary complex.

Raag, R.Poulos, T.L.

(1989) Biochemistry 28: 7586-7592

  • DOI: 10.1021/bi00445a013
  • Primary Citation of Related Structures:  
    3CPP

  • PubMed Abstract: 
  • The crystal structure of the ternary complex formed between carbon monoxide (CO), camphor, and ferrous cytochrome P-450CAM has been refined to an R value of 17.9% at 1.9-A resolution. To accommodate the CO molecule, the substrate, camphor, moves about 0.8 A while at the same time remaining in nonbonded contact with CO ...

    The crystal structure of the ternary complex formed between carbon monoxide (CO), camphor, and ferrous cytochrome P-450CAM has been refined to an R value of 17.9% at 1.9-A resolution. To accommodate the CO molecule, the substrate, camphor, moves about 0.8 A while at the same time remaining in nonbonded contact with CO. The average temperature factor of the camphor atoms is about 50% higher in the CO complex, suggesting that the camphor is more loosely bound in this ternary complex. The Fe-C-O angle is about 166 degrees, and thus, CO appears to be bent from the heme normal, as it is in various CO-globin complexes, due to steric interactions with active site groups. The oxygen atom of the CO molecule is nestled into a groove formed by an unusual helical hydrogen bond in the distal helix between the highly conserved Thr 252 and Gly 248 residues. In the transition from the ferric camphor-bound binary complex to the ferrous CO-camphor-bound ternary complex, the heme iron atom moves into the plane defined by the pyrrole nitrogens by about 0.41 A. Although the axial Cys ligand also moves toward the heme, the S-Fe bond stretches from about 2.20 A in the absence of CO to about 2.41 A once CO has bound.


    Related Citations: 
    • The Structural Basis for Substrate-Induced Changes in Redox Potential and Spin Equilibrium in Cytochrome P450-Cam
      Raag, R., Poulos, T.L.
      (1989) Biochemistry 28: 917
    • High-Resolution Crystal Structure of Cytochrome P450-Cam
      Poulos, T.L., Finzel, B.C., Howard, A.J.
      (1987) J Mol Biol 195: 687
    • The 2.6-Angstroms Crystal Structure of Pseudomonas Putida Cytochrome P450
      Poulos, T.L., Finzel, B.C., Gunsalus, I.C., Wagner, G.C., Kraut, J.
      (1985) J Biol Chem 260: 16122
    • Crystal Structure of Substrate-Free Pseudomonas Putida Cytochrome P450
      Poulos, T.L., Finzel, B.C., Howard, A.J.
      (1986) Biochemistry 25: 5314
    • Heme Enzyme Structure and Function
      Poulos, T.L., Finzel, B.C.
      (1984) Pept Protein Rev 4: 115
    • Preliminary Crystallographic Data on Cytochrome P450-Cam
      Poulos, T.L., Perez, M., Wagner, G.C.
      (1982) J Biol Chem 257: 10427
    • The Primary Structure of the Monoxygenase Cytochrome P450-Cam
      Haniu, M., Armes, L.G., Tanaka, M., Yasunobu, K.T., Shastry, B.S., Wagner, G.C., Gunsalus, I.C.
      (1982) Biochem Biophys Res Commun 105: 889

    Organizational Affiliation

    Center for Advanced Research in Biotechnology of the Maryland Biotechnology Institute, University of Maryland, Rockville 20850.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYTOCHROME P450-CAMA414Pseudomonas putidaMutation(s): 0 
Gene Names: camCcyp101
EC: 1.14.15.1
UniProt
Find proteins for P00183 (Pseudomonas putida)
Explore P00183 
Go to UniProtKB:  P00183
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
B [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
CAM (Subject of Investigation/LOI)
Query on CAM

Download Ideal Coordinates CCD File 
D [auth A]CAMPHOR
C10 H16 O
DSSYKIVIOFKYAU-XCBNKYQSSA-N
 Ligand Interaction
CMO
Query on CMO

Download Ideal Coordinates CCD File 
C [auth A]CARBON MONOXIDE
C O
UGFAIRIUMAVXCW-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Observed: 0.190 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.67α = 90
b = 103.9β = 90
c = 36.38γ = 90
Software Package:
Software NamePurpose
PROFFTrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 1989-07-05 
  • Released Date: 1990-04-15 
  • Deposition Author(s): Raag, R., Poulos, T.L.

Revision History  (Full details and data files)

  • Version 1.0: 1990-04-15
    Type: Initial release
  • Version 1.1: 2008-03-25
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other