The high resolution structure of PER-1 class A beta-lactamase

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.140 

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The High Resolution Crystal Structure for Class a Beta-Lactamase Per-1 Reveals the Bases for its Increase in Breadth of Activity

Tranier, S.Bouthors, A.T.Maveyraud, L.Guillet, V.Sougakoff, W.Samama, J.P.

(2000) J Biol Chem 275: 28075

  • DOI: https://doi.org/10.1074/jbc.M003802200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The treatment of infectious diseases by beta-lactam antibiotics is continuously challenged by the emergence and dissemination of new beta-lactamases. In most cases, the cephalosporinase activity of class A enzymes results from a few mutations in the TEM and SHV penicillinases. The PER-1 beta-lactamase was characterized as a class A enzyme displaying a cephalosporinase activity. This activity was, however, insensitive to the mutations of residues known to be critical for providing extended substrate profiles to TEM and SHV. The x-ray structure of the protein, solved at 1.9-A resolution, reveals that two of the most conserved features in class A beta-lactamases are not present in this enzyme: the fold of the Omega-loop and the cis conformation of the peptide bond between residues 166 and 167. The new fold of the Omega-loop and the insertion of four residues at the edge of strand S3 generate a broad cavity that may easily accommodate the bulky substituents of cephalosporin substrates. The trans conformation of the 166-167 bond is related to the presence of an aspartic acid at position 136. Selection of class A enzymes based on the occurrence of both Asp(136) and Asn(179) identifies a subgroup of enzymes with high sequence homology.

  • Organizational Affiliation

    Groupe de Cristallographie Biologique, Institut de Pharmacologie et de Biologie Structurale du CNRS, 205 route de Narbonne, F-31077 Toulouse cedex, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
EXTENDED-SPECTRUM BETA-LACTAMASE PER-1282Pseudomonas aeruginosaMutation(s): 0 
Gene Names: BLAPER-1
Find proteins for P37321 (Pseudomonas aeruginosa)
Explore P37321 
Go to UniProtKB:  P37321
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37321
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on SO4

Download Ideal Coordinates CCD File 
O4 S
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.140 
  • R-Value Observed: 0.140 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.6α = 90
b = 84.6β = 90
c = 46.89γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-11-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance