2WK0

Crystal structure of the class A beta-lactamase BS3 inhibited by 6- beta-iodopenicillanate.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Basis of the Inhibition of Class a Beta-Lactamases and Penicillin-Binding Proteins by 6-Beta-Iodopenicillanate.

Sauvage, E.Zervosen, A.Dive, G.Herman, R.Amoroso, A.Joris, B.Fonze, E.Pratt, R.F.Luxen, A.Charlier, P.Kerff, F.

(2009) J Am Chem Soc 131: 15262

  • DOI: 10.1021/ja9051526
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • 6-Beta-halogenopenicillanates are powerful, irreversible inhibitors of various beta-lactamases and penicillin-binding proteins. Upon acylation of these enzymes, the inhibitors are thought to undergo a structural rearrangement associated with the depa ...

    6-Beta-halogenopenicillanates are powerful, irreversible inhibitors of various beta-lactamases and penicillin-binding proteins. Upon acylation of these enzymes, the inhibitors are thought to undergo a structural rearrangement associated with the departure of the iodide and formation of a dihydrothiazine ring, but, to date, no structural evidence has proven this. 6-Beta-iodopenicillanic acid (BIP) is shown here to be an active antibiotic against various bacterial strains and an effective inhibitor of the class A beta-lactamase of Bacillus subtilis BS3 (BS3) and the D,D-peptidase of Actinomadura R39 (R39). Crystals of BS3 and of R39 were soaked with a solution of BIP and their structures solved at 1.65 and 2.2 A, respectively. The beta-lactam and the thiazolidine rings of BIP are indeed found to be fused into a dihydrothiazine ring that can adopt two stable conformations at these active sites. The rearranged BIP is observed in one conformation in the BS3 active site and in two monomers of the asymmetric unit of R39, and is observed in the other conformation in the other two monomers of the asymmetric unit of R39. The BS3 structure reveals a new mode of carboxylate interaction with a class A beta-lactamase active site that should be of interest in future inhibitor design.


    Organizational Affiliation

    Centre d'Ingénierie des Protéines and Centre de Recherches du Cyclotron, Université de Liège, B-4000 Sart Tilman, Belgium. eric.sauvage@ulg.ac.be



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-LACTAMASE
A, B
265Bacillus licheniformisMutation(s): 0 
Gene Names: penPblaP
EC: 3.5.2.6
Find proteins for P00808 (Bacillus licheniformis)
Go to UniProtKB:  P00808
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BIY
Query on BIY

Download CCD File 
A, B
(3S)-2,2-dimethyl-3,4-dihydro-2H-1,4-thiazine-3,6-dicarboxylic acid
C8 H11 N O4 S
VSZLPINYHQLOJH-YFKPBYRVSA-N
 Ligand Interaction
CIT
Query on CIT

Download CCD File 
B
CITRIC ACID
C6 H8 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EOH
Query on EOH

Download CCD File 
A, B
ETHANOL
C2 H6 O
LFQSCWFLJHTTHZ-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.988α = 90
b = 104.479β = 94.07
c = 63.74γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance