7OKC

Crystal structure of Escherichia coli LpxA in complex with compound 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Discovery of Novel UDP- N -Acetylglucosamine Acyltransferase (LpxA) Inhibitors with Activity against Pseudomonas aeruginosa .

Ryan, M.D.Parkes, A.L.Corbett, D.Dickie, A.P.Southey, M.Andersen, O.A.Stein, D.B.Barbeau, O.R.Sanzone, A.Thommes, P.Barker, J.Cain, R.Compper, C.Dejob, M.Dorali, A.Etheridge, D.Evans, S.Faulkner, A.Gadouleau, E.Gorman, T.Haase, D.Holbrow-Wilshaw, M.Krulle, T.Li, X.Lumley, C.Mertins, B.Napier, S.Odedra, R.Papadopoulos, K.Roumpelakis, V.Spear, K.Trimby, E.Williams, J.Zahn, M.Keefe, A.D.Zhang, Y.Soutter, H.T.Centrella, P.A.Clark, M.A.Cuozzo, J.W.Dumelin, C.E.Deng, B.Hunt, A.Sigel, E.A.Troast, D.M.DeJonge, B.L.M.

(2021) J Med Chem 64: 14377-14425

  • DOI: https://doi.org/10.1021/acs.jmedchem.1c00888
  • Primary Citation of Related Structures:  
    7OJ6, 7OJP, 7OJQ, 7OJW, 7OJY, 7OK1, 7OK2, 7OKA, 7OKB, 7OKC

  • PubMed Abstract: 

    This study describes a novel series of UDP- N -acetylglucosamine acyltransferase (LpxA) inhibitors that was identified through affinity-mediated selection from a DNA-encoded compound library. The original hit was a selective inhibitor of Pseudomonas aeruginosa LpxA with no activity against Escherichia coli LpxA. The biochemical potency of the series was optimized through an X-ray crystallography-supported medicinal chemistry program, resulting in compounds with nanomolar activity against P. aeruginosa LpxA (best half-maximal inhibitory concentration (IC 50 ) <5 nM) and cellular activity against P. aeruginosa (best minimal inhibitory concentration (MIC) of 4 μg/mL). Lack of activity against E. coli was maintained (IC 50 > 20 μM and MIC > 128 μg/mL). The mode of action of analogues was confirmed through genetic analyses. As expected, compounds were active against multidrug-resistant isolates. Further optimization of pharmacokinetics is needed before efficacy studies in mouse infection models can be attempted. To our knowledge, this is the first reported LpxA inhibitor series with selective activity against P. aeruginosa .


  • Organizational Affiliation

    X-Biotix Therapeutics, 465 Waverly Oaks Road, Waltham, Massachusetts 02452, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase265Escherichia coliMutation(s): 0 
EC: 2.3.1.129
UniProt
Find proteins for C3TPH2 (Escherichia coli)
Explore C3TPH2 
Go to UniProtKB:  C3TPH2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC3TPH2
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
VFE (Subject of Investigation/LOI)
Query on VFE

Download Ideal Coordinates CCD File 
B [auth A]2-[2-(2-chlorophenyl)sulfanylethanoyl-[[4-(1,2,4-triazol-1-yl)phenyl]methyl]amino]-N-methyl-ethanamide
C20 H20 Cl N5 O2 S
NVGPCILMXWWONB-UHFFFAOYSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
C [auth A]SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.086α = 90
b = 96.086β = 90
c = 96.086γ = 90
Software Package:
Software NamePurpose
xia2data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
xia2data reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-10-06
    Type: Initial release
  • Version 1.1: 2021-10-13
    Changes: Data collection
  • Version 1.2: 2021-10-27
    Changes: Data collection, Database references
  • Version 1.3: 2024-01-31
    Changes: Data collection, Refinement description