1CQZ

CRYSTAL STRUCTURE OF MURINE SOLUBLE EPOXIDE HYDROLASE.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.269 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Detoxification of environmental mutagens and carcinogens: structure, mechanism, and evolution of liver epoxide hydrolase.

Argiriadi, M.A.Morisseau, C.Hammock, B.D.Christianson, D.W.

(1999) Proc Natl Acad Sci U S A 96: 10637-10642

  • DOI: 10.1073/pnas.96.19.10637
  • Primary Citation of Related Structures:  
    1CR6, 1CQZ

  • PubMed Abstract: 
  • The crystal structure of recombinant murine liver cytosolic epoxide hydrolase (EC 3.3.2.3) has been determined at 2.8-A resolution. The binding of a nanomolar affinity inhibitor confirms the active site location in the C-terminal domain; this domain ...

    The crystal structure of recombinant murine liver cytosolic epoxide hydrolase (EC 3.3.2.3) has been determined at 2.8-A resolution. The binding of a nanomolar affinity inhibitor confirms the active site location in the C-terminal domain; this domain is similar to that of haloalkane dehalogenase and shares the alpha/beta hydrolase fold. A structure-based mechanism is proposed that illuminates the unique chemical strategy for the activation of endogenous and man-made epoxide substrates for hydrolysis and detoxification. Surprisingly, a vestigial active site is found in the N-terminal domain similar to that of another enzyme of halocarbon metabolism, haloacid dehalogenase. Although the vestigial active site does not participate in epoxide hydrolysis, the vestigial domain plays a critical structural role by stabilizing the dimer in a distinctive domain-swapped architecture. Given the genetic and structural relationships among these enzymes of xenobiotic metabolism, a structure-based evolutionary sequence is postulated.


    Related Citations: 
    • Molecular cloning and expression of murine liver soluble epoxide hydrolase
      Grant, D.F., Storms, D.H., Hammock, B.D.
      (1993) J Biol Chem 268: 17628
    • Gene evolution of epoxide hydrolases and recommended nomenclature
      Beetham, J.K., Grant, D., Arand, M., Garbarino, J., Kiyosue, T., Pinot, F., Oesch, F., Belknap, W.R., Shinozaki, K., Hammock, B.D.
      (1995) DNA Cell Biol 14: 61

    Organizational Affiliation

    Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104-6323, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EPOXIDE HYDROLASEAB554Mus musculusMutation(s): 0 
Gene Names: Ephx2Eph2
EC: 3.3.2.3 (PDB Primary Data), 3.3.2.10 (UniProt), 3.1.3.76 (UniProt)
Find proteins for P34914 (Mus musculus)
Explore P34914 
Go to UniProtKB:  P34914
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.269 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 151.9α = 90
b = 143β = 90
c = 60γ = 90
Software Package:
Software NamePurpose
MLPHAREphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-11-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance