6D15

Crystal structure of KPC-2 complexed with compound 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.145 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Heteroaryl Phosphonates as Noncovalent Inhibitors of Both Serine- and Metallocarbapenemases.

Pemberton, O.A.Jaishankar, P.Akhtar, A.Adams, J.L.Shaw, L.N.Renslo, A.R.Chen, Y.

(2019) J Med Chem 62: 8480-8496

  • DOI: 10.1021/acs.jmedchem.9b00728
  • Primary Citation of Related Structures:  
    6D15, 6D16, 6D17, 6D18, 6D19, 6D1A, 6D1B, 6D1C, 6D1D, 6D1E, 6D1F, 6D1G, 6D1H, 6D1I, 6D1J, 6D1K, 6DD0, 6DD1, 6NY7, 6O3R, 6O5T

  • PubMed Abstract: 
  • Gram-negative pathogens expressing serine β-lactamases (SBLs) and metallo-β-lactamases (MBLs), especially those with carbapenemase activity, threaten the clinical utility of almost all β-lactam antibiotics. Here we describe the discovery of a heteroaryl phosphonate scaffold that exhibits noncovalent cross-class inhibition of representative carbapenemases, specifically the SBL KPC-2 and the MBLs NDM-1 and VIM-2 ...

    Gram-negative pathogens expressing serine β-lactamases (SBLs) and metallo-β-lactamases (MBLs), especially those with carbapenemase activity, threaten the clinical utility of almost all β-lactam antibiotics. Here we describe the discovery of a heteroaryl phosphonate scaffold that exhibits noncovalent cross-class inhibition of representative carbapenemases, specifically the SBL KPC-2 and the MBLs NDM-1 and VIM-2. The most potent lead, compound 16 , exhibited low nM to low μM inhibition of KPC-2, NDM-1, and VIM-2. Compound 16 potentiated imipenem efficacy against resistant clinical and laboratory bacterial strains expressing carbapenemases while showing some cytotoxicity toward human HEK293T cells only at concentrations above 100 μg/mL. Complex structures with KPC-2, NDM-1, and VIM-2 demonstrate how these inhibitors achieve high binding affinity to both enzyme classes. These findings provide a structurally and mechanistically new scaffold for drug discovery targeting multidrug resistant Gram-negative pathogens and more generally highlight the active site features of carbapenemases that can be leveraged for lead discovery.


    Organizational Affiliation

    Department of Molecular Medicine , University of South Florida Morsani College of Medicine , 12901 Bruce B. Downs Boulevard, MDC 3522 , Tampa , Florida 33612 , United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carbapenem-hydrolyzing beta-lactamase KPCA290Klebsiella pneumoniaeMutation(s): 0 
Gene Names: blakpckpc1
EC: 3.5.2.6
UniProt
Find proteins for Q9F663 (Klebsiella pneumoniae)
Explore Q9F663 
Go to UniProtKB:  Q9F663
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9F663
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TWB (Subject of Investigation/LOI)
Query on TWB

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
[(6,7-dimethyl-2-oxo-2H-1-benzopyran-4-yl)methyl]phosphonic acid
C12 H13 O5 P
XVHQGEOFAUWESF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
D [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
TWB Binding MOAD:  6D15 Ki: 3.29e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.169 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.145 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.85α = 90
b = 59.09β = 90
c = 78.18γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesR01AI103158-04

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-17
    Type: Initial release
  • Version 1.1: 2019-10-02
    Changes: Data collection, Database references
  • Version 1.2: 2019-10-09
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence