VIM-26-PEG. Leu224 in VIM-26 from Klebsiella pneumoniae has implications for drug binding.

Experimental Data Snapshot

  • Resolution: 1.66 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 

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Structural and Biochemical Characterization of Vim-26 Show that Leu224 Has Implications for the Substrate Specificity of Vim Metallo-Beta-Lactamases.

Leiros, H.S.Edvardsen, K.S.W.Bjerga, G.E.K.Samuelsen, O.

(2015) FEBS J 282: 1031

  • DOI: https://doi.org/10.1111/febs.13200
  • Primary Citation of Related Structures:  
    4UWO, 4UWP, 4UWR, 4UWS

  • PubMed Abstract: 

    During the last decades antimicrobial resistance has become a global health problem. Metallo-β-lactamases (MBLs) which are broad-spectrum β-lactamases that inactivate virtually all β-lactams including carbapenems, are contributing to this health problem. In this study a novel MBL variant, termed VIM-26, identified in a Klebsiella pneumoniae isolate was studied. VIM-26 belongs to the Verona integron-encoded metallo-β-lactamase (VIM) family of MBLs and is a His224Leu variant of the well-characterized VIM-1 variant. In this study, we report the kinetic parameters, minimum inhibitory concentrations and crystal structures of a recombinant VIM-26 protein, and compare them to previously published data on VIM-1, VIM-2 and VIM-7. The kinetic parameters and minimum inhibitory concentration determinations show that VIM-26, like VIM-7, has higher penicillinase activity but lower cephalosporinase activity than VIM-1 and VIM-2. The four determined VIM-26 crystal structures revealed mono- and di-zinc forms, where the Zn1 ion has distorted tetrahedral coordination geometry with an additional water molecule (W2) at a distance of 2.6-3.7 Å, which could be important during catalysis. The R2 drug binding site in VIM-26 is more open compared to VIM-2 and VIM-7 and neutrally charged due to Leu224 and Ser228. Thus, the VIM-26 drug binding properties are different from the VIM-2 (Tyr224/Arg228) and VIM-7 (His224/Arg228) structures, indicating a role of these residues in the substrate specificity.

  • Organizational Affiliation

    Norwegian Structural Biology Centre, Department of Chemistry, UiT The Arctic University of Norway, Tromsø, Norway.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
METALLO-BETA-LACTAMASE VIM-26A [auth B]266Klebsiella pneumoniaeMutation(s): 0 
Find proteins for E5BDC6 (Klebsiella pneumoniae)
Explore E5BDC6 
Go to UniProtKB:  E5BDC6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE5BDC6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.66 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.759α = 90
b = 68.172β = 92.56
c = 40.406γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-04
    Type: Initial release
  • Version 1.1: 2015-04-15
    Changes: Database references
  • Version 2.0: 2019-10-23
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Other
  • Version 2.1: 2024-01-10
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description