4JF5

Structure of OXA-23 at pH 4.1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.15 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.141 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Basis for Carbapenemase Activity of the OXA-23 beta-Lactamase from Acinetobacter baumannii.

Smith, C.A.Antunes, N.T.Stewart, N.K.Toth, M.Kumarasiri, M.Chang, M.Mobashery, S.Vakulenko, S.B.

(2013) Chem Biol 20: 1107-1115

  • DOI: 10.1016/j.chembiol.2013.07.015
  • Primary Citation of Related Structures:  
    4JF4, 4JF5, 4JF6

  • PubMed Abstract: 
  • Dissemination of Acinetobacter baumannii strains harboring class D β-lactamases producing resistance to carbapenem antibiotics severely limits our ability to treat deadly Acinetobacter infections. Susceptibility determination in the A. baumannii background and kinetic studies with a homogeneous preparation of OXA-23 β-lactamase, the major carbapenemase present in A ...

    Dissemination of Acinetobacter baumannii strains harboring class D β-lactamases producing resistance to carbapenem antibiotics severely limits our ability to treat deadly Acinetobacter infections. Susceptibility determination in the A. baumannii background and kinetic studies with a homogeneous preparation of OXA-23 β-lactamase, the major carbapenemase present in A. baumannii, document the ability of this enzyme to manifest resistance to last-resort carbapenem antibiotics. We also report three X-ray structures of OXA-23: apo OXA-23 at two different pH values, and wild-type OXA-23 in complex with meropenem, a carbapenem substrate. The structures and dynamics simulations reveal an important role for Leu166, whose motion regulates the access of a hydrolytic water molecule to the acyl-enzyme species in imparting carbapenemase activity.


    Organizational Affiliation

    Stanford Synchrotron Radiation Lightsource, Stanford University, Menlo Park, CA 94025, USA. Electronic address: csmith@slac.stanford.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-lactamaseA243Acinetobacter baumanniiMutation(s): 0 
Gene Names: 
EC: 3.5.2.6
UniProt
Find proteins for Q9L4P2 (Acinetobacter baumannii)
Explore Q9L4P2 
Go to UniProtKB:  Q9L4P2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9L4P2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FLC
Query on FLC

Download Ideal Coordinates CCD File 
B [auth A]CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
C [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.15 Å
  • R-Value Free: 0.162 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.141 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.919α = 90
b = 49.651β = 96.97
c = 44.121γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-09-25
    Type: Initial release
  • Version 1.1: 2013-10-09
    Changes: Database references