1PIO

AN ENGINEERED STAPHYLOCOCCUS AUREUS PC1 BETA-LACTAMASE THAT HYDROLYSES THIRD GENERATION CEPHALOSPORINS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

An engineered Staphylococcus aureus PC1 beta-lactamase that hydrolyses third-generation cephalosporins.

Zawadzke, L.E.Smith, T.J.Herzberg, O.

(1995) Protein Eng 8: 1275-1285

  • DOI: 10.1093/protein/8.12.1275
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The beta-lactamase from Staphylococcus aureus PC1 has been cloned into an Escherichia coli vector for site-directed mutagenesis and high-level protein expression. A mutant enzyme has been produced in which Ala238 is replaced by a serine, and Ile239 i ...

    The beta-lactamase from Staphylococcus aureus PC1 has been cloned into an Escherichia coli vector for site-directed mutagenesis and high-level protein expression. A mutant enzyme has been produced in which Ala238 is replaced by a serine, and Ile239 is deleted (A238S:I239del). The engineered enzyme hydrolyses third-generation cephalosporins substantially more rapidly than the parental enzyme does, while hydrolysis of benzylpenicillin is slower with the mutant than with the wild-type and native enzymes. The mutant beta-lactamase has been crystallized and the structure determined and refined at 2.8 A resolution. The disposition of the beta-strand which forms the side of the active site is altered in comparison with the native S. aureus beta-lactamase structure, widening the active site cleft and providing space to accommodate the bulky side-chains of the third-generation cephalosporins.


    Related Citations: 
    • Refined Crystal Structure of Beta-Lactamase from Staphylococcus Aureus Pc1 at 2.0 Angstroms Resolution
      Herzberg, O.
      (1991) J Mol Biol 217: 701
    • Bacterial Resistance to Beta-Lactam Antibiotics. Crystal Structure of Beta-Lactamase from Staphylococcus Aureus Pc1 at 2.5 Angstroms Resolution
      Herzberg, O., Moult, J.
      (1987) Science 236: 694

    Organizational Affiliation

    Center for Advanced Research in Biotechnology, University of Maryland Biotechnology Institute, Rockville 20850, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-LACTAMASE
A, B
257Staphylococcus aureusMutation(s): 1 
Gene Names: blaZ
EC: 3.5.2.6
Find proteins for P00807 (Staphylococcus aureus)
Go to UniProtKB:  P00807
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.189 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54α = 90
b = 67.6β = 90
c = 141.4γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
XENGENdata reduction
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance