1JWZ

Crystal structure of TEM-64 beta-lactamase in complex with a boronic acid inhibitor (105)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Evolution of an antibiotic resistance enzyme constrained by stability and activity trade-offs.

Wang, X.Minasov, G.Shoichet, B.K.

(2002) J.Mol.Biol. 320: 85-95

  • DOI: 10.1016/S0022-2836(02)00400-X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Pressured by antibiotic use, resistance enzymes have been evolving new activities. Does such evolution have a cost? To investigate this question at the molecular level, clinically isolated mutants of the beta-lactamase TEM-1 were studied. When purifi ...

    Pressured by antibiotic use, resistance enzymes have been evolving new activities. Does such evolution have a cost? To investigate this question at the molecular level, clinically isolated mutants of the beta-lactamase TEM-1 were studied. When purified, mutant enzymes had increased activity against cephalosporin antibiotics but lost both thermodynamic stability and kinetic activity against their ancestral targets, penicillins. The X-ray crystallographic structures of three mutant enzymes were determined. These structures suggest that activity gain and stability loss is related to an enlarged active site cavity in the mutant enzymes. In several clinically isolated mutant enzymes, a secondary substitution is observed far from the active site (Met182-->Thr). This substitution had little effect on enzyme activity but restored stability lost by substitutions near the active site. This regained stability conferred an advantage in vivo. This pattern of stability loss and restoration may be common in the evolution of new enzyme activity.


    Organizational Affiliation

    Department of Molecular Pharmacology and Biological Chemistry, Northwestern University School of Medicine, 303 East Chicago Avenue, Chicago, IL 60611-3008, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-lactamase TEM
A
263Escherichia coliMutations: K79E, T157M, S139R
Gene Names: bla, blaT-3, blaT-4, blaT-5, blaT-6
EC: 3.5.2.6
Find proteins for P62593 (Escherichia coli)
Go to UniProtKB:  P62593
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
105
Query on 105

Download SDF File 
Download CCD File 
A
N-[5-METHYL-3-O-TOLYL-ISOXAZOLE-4-CARBOXYLIC ACID AMIDE] BORONIC ACID
CLOXACILLIN DERIVATIVE
C12 H12 B Cl N2 O4
LSXNXXCBOPILJR-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.168 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.002α = 90.00
b = 34.546β = 90.00
c = 105.489γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-06-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance