5OE2 image
Deposition Date 2017-07-07
Release Date 2017-08-02
Last Version Date 2024-01-17
Entry Detail
PDB ID:
5OE2
Keywords:
ANTIBIOTIC
Title:
CRYSTAL STRUCTURE OF THE BETA-LACTAMASE OXA-245
Biological Source:
Source Organism:
Klebsiella pneumoniae (Taxon ID: 573)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.20 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 1 21 1
5OE2 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Beta-lactamase
Gene (Uniprot):blaOXA-245
Chain IDs:A, B, C, D
Chain Length:265
Number of Molecules:4
Biological Source:Klebsiella pneumoniae
UniProt ID:L7V1I2 Pfam ID:PF00905
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
KCX A LYS modified residue
Ligand Molecules
CL
NA
Primary Citation
Structure, activity and thermostability investigations of OXA-163, OXA-181 and OXA-245 using biochemical analysis, crystal structures and differential scanning calorimetry analysis.
Acta Crystallogr F Struct Biol Commun 73 579 587 (2017)
PMID: 28994407 DOI: 10.1107/S2053230X17013838

Abstact

The first crystal structures of the class D β-lactamases OXA-181 and OXA-245 were determined to 2.05 and 2.20 Å resolution, respectively; in addition, the structure of a new crystal form of OXA-163 was resolved to 2.07 Å resolution. All of these enzymes are OXA-48-like and have been isolated from different clinical Klebsiella pneumoniae strains and also from other human pathogens such as Pseudomonas aeruginosa and Escherichia coli. Here, enzyme kinetics and thermostability studies are presented, and the new crystal structures are used to explain the observed variations. OXA-245 had the highest melting point (Tm = 55.8°C), as determined by differential scanning calorimetry, compared with OXA-163 (Tm = 49.4°C) and OXA-181 (Tm = 52.6°C). The differences could be explained by the loss of two salt bridges in OXA-163, and an overall decrease in the polarity of the surface of OXA-181 compared with OXA-245.

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Primary Citation of related structures
5OE2