Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 125164.08 
• Atom Count: 8178 
• Residue Count: 1108 
• Unique protein chains: 1

1CQZ

CRYSTAL STRUCTURE OF MURINE SOLUBLE EPOXIDE HYDROLASE.

• DOI: 10.2210/pdb1CQZ/pdb

• Classification: HYDROLASE
• Organism(s): Mus musculus
• Expression System: Spodoptera frugiperda


• Deposited: 1999-08-12 Released: 1999-11-19 
• Deposition Author(s): Argiriadi, M.A., Morisseau, C., Hammock, B.D., Christianson, D.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.309 
• R-Value Work: 0.214 

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.USA 96: 10637-10642

• PubMed: 10485878 
• DOI: 10.1073/pnas.96.19.10637
• Primary Citation of Related Structures:  
  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.

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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




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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
EPOXIDE HYDROLASE	A, B	554	Mus musculus	Mutation(s): 0  Gene Names: Ephx2 (Eph2)
Find proteins for P34914 (Mus musculus) Go to UniProtKB:  P34914

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.309 
• R-Value Work: 0.214 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 151.900	α = 90.00
b = 143.000	β = 90.00
c = 60.000	γ = 90.00

Software Package:

Software Name	Purpose
MLPHARE	phasing
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-08-12 
• Released Date: 1999-11-19 
• Deposition Author(s): Argiriadi, M.A., Morisseau, C., Hammock, B.D., Christianson, D.W.

Revision History 

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