1PQ2

Crystal Structure of Human Drug Metabolizing Cytochrome P450 2C8

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structure of human microsomal cytochrome P450 2C8. Evidence for a peripheral fatty acid binding site

Schoch, G.A., Yano, J.K., Wester, M.R., Griffin, K.J., Stout, C.D., Johnson, E.F.

(2004) J.Biol.Chem. 279: 9497-9503

  • DOI: 10.1074/jbc.M312516200

  • PubMed Abstract: 

    • A 2.7-Angstrom molecular structure of human microsomal cytochrome P450 2C8 (CYP2C8) was determined by x-ray crystallography. The membrane protein was modified for crystallization by replacement of the hydrophobic N-terminal transmembrane domain with ...

    A 2.7-Angstrom molecular structure of human microsomal cytochrome P450 2C8 (CYP2C8) was determined by x-ray crystallography. The membrane protein was modified for crystallization by replacement of the hydrophobic N-terminal transmembrane domain with a short hydrophilic sequence before residue 28. The structure of the native sequence is complete from residue 28 to the beginning of a C-terminal histidine tag used for purification. CYP2C8 is one of the principal hepatic drug-metabolizing enzymes that oxidizes therapeutic drugs such as taxol and cerivastatin and endobiotics such as retinoic acid and arachidonic acid. Consistent with the relatively large size of its preferred substrates, the active site volume is twice that observed for the structure of CYP2C5. The extended active site cavity is bounded by the beta1 sheet and helix F' that have not previously been implicated in substrate recognition by mammalian P450s. CYP2C8 crystallized as a symmetric dimer formed by the interaction of helices F, F', G', and G. Two molecules of palmitic acid are bound in the dimer interface. The dimer is observed in solution, and mass spectrometry confirmed the association of palmitic acid with the enzyme. This novel finding identifies a peripheral binding site in P450s that may contribute to drug-drug interactions in P450 metabolism.

    Organizational Affiliation: 

    Department of Molecular and Experimental Medicine.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytochrome P450 2C8
A, B
476Homo sapiensMutation(s): 9 
Gene Names: CYP2C8
EC: 1.14.14.1
Find proteins for P10632 (Homo sapiens)
Go to Gene View: CYP2C8
Go to UniProtKB:  P10632
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4
Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
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
PLM
Query on PLM
Download SDF File 
Download CCD File 
A, B
PALMITIC ACID
C16 H32 O2
IPCSVZSSVZVIGE-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.248 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 105.988α = 90.00
b = 137.405β = 112.51
c = 97.322γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CNSrefinement
CCP4data scaling
SCALAdata scaling
CNSphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-01-13
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance