8V9H

GES-5-NA-1-157 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.161 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.0 of the entry. See complete history


Literature

Restricted Rotational Flexibility of the C5 alpha-Methyl-Substituted Carbapenem NA-1-157 Leads to Potent Inhibition of the GES-5 Carbapenemase.

Stewart, N.K.Toth, M.Quan, P.Beer, M.Buynak, J.D.Smith, C.A.Vakulenko, S.B.

(2024) ACS Infect Dis 

  • DOI: https://doi.org/10.1021/acsinfecdis.3c00683
  • Primary Citation of Related Structures:  
    8V9G, 8V9H

  • PubMed Abstract: 

    Carbapenem antibiotics are used as a last-resort treatment for infections caused by multidrug-resistant bacteria. The wide spread of carbapenemases in Gram-negative bacteria has severely compromised the utility of these drugs and represents a serious public health threat. To combat carbapenemase-mediated resistance, new antimicrobials and inhibitors of these enzymes are urgently needed. Here, we describe the interaction of the atypically C5α-methyl-substituted carbapenem, NA-1-157, with the GES-5 carbapenemase. MICs of this compound against Escherichia coli , Klebsiella pneumoniae , and Acinetobacter baumannii producing the enzyme were reduced 4-16-fold when compared to MICs of the commercial carbapenems, reaching clinically sensitive breakpoints. When NA-1-157 was combined with meropenem, a strong synergistic effect was observed. Kinetic and ESI-LC/MS studies demonstrated that NA-1-157 is a potent inhibitor of GES-5, with a high inactivation efficiency of (2.9 ± 0.9) × 10 5 M -1 s -1 . Acylation of GES-5 by NA-1-157 was biphasic, with the fast phase completing within seconds, and the slow phase taking several hours and likely proceeding through a reversible tetrahedral intermediate. Deacylation was extremely slow ( k 3 = (2.4 ± 0.3) × 10 -7 s -1 ), resulting in a residence time of 48 ± 6 days. MD simulation of the GES-5-meropenem and GES-5-NA-1-157 acyl-enzyme complexes revealed that the C5α-methyl group in NA-1-157 sterically restricts rotation of the 6α-hydroxyethyl group preventing ingress of the deacylating water into the vicinity of the scissile bond of the acyl-enzyme intermediate. These data demonstrate that NA-1-157 is a potent irreversible inhibitor of the GES-5 carbapenemase.


  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
beta-lactamase
A, B
287Klebsiella pneumoniaeMutation(s): 0 
Gene Names: blaGES-5
UniProt
Find proteins for Q09HD0 (Klebsiella pneumoniae)
Explore Q09HD0 
Go to UniProtKB:  Q09HD0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ09HD0
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Y33 (Subject of Investigation/LOI)
Query on Y33

Download Ideal Coordinates CCD File 
C [auth A],
L [auth B]
(5R)-3-{[(3S,5S)-5-(dimethylcarbamoyl)pyrrolidin-3-yl]sulfanyl}-5-[(2S,3R)-3-hydroxy-1-oxobutan-2-yl]-5-methyl-4,5-dihydro-1H-pyrrole-2-carboxylic acid
C17 H27 N3 O6 S
VXMSHTHJORSDKD-YTOYJYLESA-N
IOD
Query on IOD

Download Ideal Coordinates CCD File 
F [auth A],
O [auth B],
P [auth B]
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
EDO
Query on EDO

Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
M [auth B],
N [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
G [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
H [auth A]
I [auth A]
J [auth A]
K [auth A]
Q [auth B]
H [auth A],
I [auth A],
J [auth A],
K [auth A],
Q [auth B],
R [auth B],
S [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.161 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.727α = 90
b = 80.381β = 90
c = 87.706γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



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 States1R01AI155723

Revision History  (Full details and data files)

  • Version 1.0: 2024-04-03
    Type: Initial release