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 1.3 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: https://doi.org/10.1073/pnas.96.19.10637
  • Primary Citation of Related Structures:  
    1CQZ, 1CR6

  • 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 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.


  • 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)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
EPOXIDE HYDROLASE
A, B
554Mus musculusMutation(s): 0 
EC: 3.3.2.3 (PDB Primary Data), 3.1.3.76 (UniProt), 3.3.2.10 (UniProt)
UniProt
Find proteins for P34914 (Mus musculus)
Explore P34914 
Go to UniProtKB:  P34914
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP34914
Sequence Annotations
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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  (Full details and data files)

  • 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
  • Version 1.3: 2024-02-07
    Changes: Data collection, Database references