1LZL

Bacterial Heroin Esterase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

OBSERVATION OF AN ARSENIC ADDUCT IN AN ACETYL ESTERASE CRYSTAL STRUCTURE

ZHU, X.LARSEN, N.A.BASRAN, A.BRUCE, N.C.WILSON, I.A.

(2003) J.Biol.Chem. 278: 2008-2014

  • DOI: 10.1074/jbc.M210103200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The crystal structures of an acetyl esterase, HerE, and its complex with an inhibitor dimethylarsinic acid have been determined at 1.30- and 1.45-A resolution, respectively. Although the natural substrate for the enzyme is unknown, HerE hydrolyzes th ...

    The crystal structures of an acetyl esterase, HerE, and its complex with an inhibitor dimethylarsinic acid have been determined at 1.30- and 1.45-A resolution, respectively. Although the natural substrate for the enzyme is unknown, HerE hydrolyzes the acetyl groups from heroin to yield morphine and from phenyl acetate to yield phenol. Recently, the activity of the enzyme toward heroin has been exploited to develop a heroin biosensor, which affords higher sensitivity than other currently available detection methods. The crystal structure reveals a single domain with the canonical alpha/beta hydrolase fold with an acyl binding pocket that snugly accommodates the acetyl substituent of the substrate and three backbone amides that form a tripartite oxyanion hole. In addition, a covalent adduct was observed between the active site serine and dimethylarsinic acid, which inhibits the enzyme. This crystal structure provides the first example of an As-containing compound in a serine esterase active site and the first example of covalent modification of serine by arsenic. Thus, the HerE complex reveals the structural basis for the broad scope inhibition of serine hydrolases by As(V)-containing organic compounds.


    Organizational Affiliation

    Department of Molecular Biology and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California, 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEROIN ESTERASE
A
323Rhodococcus spMutation(s): 0 
Gene Names: her
Find proteins for O06441 (Rhodococcus sp)
Go to UniProtKB:  O06441
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.3 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.153 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 71.431α = 90.00
b = 71.431β = 90.00
c = 105.675γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
SHELXL-97refinement
CNSphasing
HKL-2000data reduction
CNSrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-01-28
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance