6T3D

Crystal structure of AmpC from E.coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.159 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Bicyclic Boronates as Potent Inhibitors of AmpC, the Class C beta-Lactamase from Escherichia coli .

Lang, P.A.Parkova, A.Leissing, T.M.Calvopina, K.Cain, R.Krajnc, A.Panduwawala, T.D.Philippe, J.Fishwick, C.W.G.Trapencieris, P.Page, M.G.P.Schofield, C.J.Brem, J.

(2020) Biomolecules 10

  • DOI: https://doi.org/10.3390/biom10060899
  • Primary Citation of Related Structures:  
    6T3D, 6YEN, 6YEO, 6YPD

  • PubMed Abstract: 

    Resistance to β-lactam antibacterials, importantly via production of β-lactamases, threatens their widespread use. Bicyclic boronates show promise as clinically useful, dual-action inhibitors of both serine- (SBL) and metallo- (MBL) β-lactamases. In combination with cefepime, the bicyclic boronate taniborbactam is in phase 3 clinical trials for treatment of complicated urinary tract infections. We report kinetic and crystallographic studies on the inhibition of AmpC, the class C β‑lactamase from Escherichia coli , by bicyclic boronates, including taniborbactam, with different C-3 side chains. The combined studies reveal that an acylamino side chain is not essential for potent AmpC inhibition by active site binding bicyclic boronates. The tricyclic form of taniborbactam was observed bound to the surface of crystalline AmpC, but not at the active site, where the bicyclic form was observed. Structural comparisons reveal insights into why active site binding of a tricyclic form has been observed with the NDM-1 MBL, but not with other studied β-lactamases. Together with reported studies on the structural basis of inhibition of class A, B and D β‑lactamases, our data support the proposal that bicyclic boronates are broad-spectrum β‑lactamase inhibitors that work by mimicking a high energy 'tetrahedral' intermediate. These results suggest further SAR guided development could improve the breadth of clinically useful β-lactamase inhibition.


  • Organizational Affiliation

    Department of Chemistry, University of Oxford, Chemistry Research Laboratory, Oxford OX1 3TA, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-lactamase358Escherichia coli K-12Mutation(s): 0 
Gene Names: ampCampAb4150JW4111
EC: 3.5.2.6
UniProt
Find proteins for P00811 (Escherichia coli (strain K12))
Explore P00811 
Go to UniProtKB:  P00811
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00811
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.159 
  • Space Group: P 43 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 139.18α = 90
b = 139.18β = 90
c = 139.18γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMRF-145-0004-TPG-AVISO

Revision History  (Full details and data files)

  • Version 1.0: 2020-06-24
    Type: Initial release
  • Version 1.1: 2020-07-01
    Changes: Database references
  • Version 1.2: 2020-09-30
    Changes: Database references, Derived calculations
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description