1P7R

CRYSTAL STRUCTURE OF REDUCED, CO-EXPOSED COMPLEX OF CYTOCHROME P450CAM WITH (S)-(-)-NICOTINE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.274 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Crystallographic Studies on the Complex Behavior of Nicotine Binding to P450cam (CYP101)(dagger).

Strickler, M.Goldstein, B.M.Maxfield, K.Shireman, L.Kim, G.Matteson, D.Jones, J.P.

(2003) Biochemistry 42: 11943-11950

  • DOI: 10.1021/bi034833o
  • Primary Citation of Related Structures:  
    1P2Y, 1P7R

  • PubMed Abstract: 
  • Crystallographic and spectroscopic studies have been undertaken to characterize the binding behavior of the non-native substrate nicotine in the active site of the monooxygenase hemoprotein cytochrome P450cam. Despite the existence of a theoretical model that is consistent with the observed distribution of monooxygenation products, the crystal structure of the complex indicates that the primary binding mode of nicotine is unproductive ...

    Crystallographic and spectroscopic studies have been undertaken to characterize the binding behavior of the non-native substrate nicotine in the active site of the monooxygenase hemoprotein cytochrome P450cam. Despite the existence of a theoretical model that is consistent with the observed distribution of monooxygenation products, the crystal structure of the complex indicates that the primary binding mode of nicotine is unproductive. The structure is confirmed by spectral data that indicate direct coordination of substrate pyridine nitrogen with the heme iron. This would be the proper structure for evaluating binding affinity and inhibition. Reduction of the heme from Fe(III) to Fe(II) and introduction of carbon monoxide into crystals of the nicotine-P450cam complex, to simulate molecular oxygen binding, produces reorientation of the nicotine. This orientation is the appropriate one for predicting regioselectivity and the kinetic features of substrate oxidation. While it is not clear that such complicated behavior will be exhibited for other enzyme-substrate interactions, it is clear that a single crystal structure for a given substrate-enzyme interaction may not provide a good description of the binding mode responsible for product formation.


    Organizational Affiliation

    Department of Biophysics, University of Rochester, Rochester, New York 14627, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome P450-camA420Pseudomonas putidaMutation(s): 0 
Gene Names: CAMC OR CYP101camCcyp101
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 2 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
NCT (Subject of Investigation/LOI)
Query on NCT

Download Ideal Coordinates CCD File 
C [auth A](S)-3-(1-METHYLPYRROLIDIN-2-YL)PYRIDINE
C10 H14 N2
SNICXCGAKADSCV-JTQLQIEISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.238 
  • R-Value Observed: 0.274 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.455α = 90
b = 63.455β = 90
c = 248.759γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-28
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance