4P71

Apo PheRS from P. aeuriginosa

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

The role of a novel auxiliary pocket in bacterial phenylalanyl-tRNA synthetase druggability.

Abibi, A., Ferguson, A.D., Fleming, P.R., Gao, N., Hajec, L.I., Hu, J., Laganas, V.A., McKinney, D.C., McLeod, S.M., Prince, D.B., Shapiro, A.B., Buurman, E.T.

(2014) J.Biol.Chem. 289: 21651-21662

  • DOI: 10.1074/jbc.M114.574061
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The antimicrobial activity of phenyl-thiazolylurea-sulfonamides against Staphylococcus aureus PheRS are dependent upon phenylalanine levels in the extracellular fluids. Inhibitor efficacy in animal models of infection is substantially diminished by d ...

    The antimicrobial activity of phenyl-thiazolylurea-sulfonamides against Staphylococcus aureus PheRS are dependent upon phenylalanine levels in the extracellular fluids. Inhibitor efficacy in animal models of infection is substantially diminished by dietary phenylalanine intake, thereby reducing the perceived clinical utility of this inhibitor class. The search for novel antibacterial compounds against Gram-negative pathogens led to a re-evaluation of this phenomenon, which is shown here to be unique to S. aureus. Inhibition of macromolecular syntheses and characterization of novel resistance mutations in Escherichia coli demonstrate that antimicrobial activity of phenyl-thiazolylurea-sulfonamides is mediated by PheRS inhibition, validating this enzyme as a viable drug discovery target for Gram-negative pathogens. A search for novel inhibitors of PheRS yielded three novel chemical starting points. NMR studies were used to confirm direct target engagement for phenylalanine-competitive hits. The crystallographic structure of Pseudomonas aeruginosa PheRS defined the binding modes of these hits and revealed an auxiliary hydrophobic pocket that is positioned adjacent to the phenylalanine binding site. Three viable inhibitor-resistant mutants were mapped to this pocket, suggesting that this region is a potential liability for drug discovery.

    Organizational Affiliation: 

    From the Departments of Biosciences and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phenylalanine--tRNA ligase beta subunit
A, B
792Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: pheT
EC: 6.1.1.20
Find proteins for Q9I0A4 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9I0A4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Phenylalanine--tRNA ligase alpha subunit
C, D
338Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: pheS
EC: 6.1.1.20
Find proteins for Q9I0A3 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  Q9I0A3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.79 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.191 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 112.780α = 90.00
b = 219.080β = 101.91
c = 107.130γ = 90.00
Software Package:
Software NamePurpose
MATTHEWSrefinement
BUSTERrefinement
ROVERSIrefinement
VONRHEINrefinement
DENZOdata reduction
MOLREPphasing
SCALEPACKdata scaling
SMARTrefinement
TRONRUDrefinement
SHARFFrefinement
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2014-03-25 
  • Released Date: 2014-06-25 
  • Deposition Author(s): Ferguson, A.D.

Revision History 

  • Version 1.0: 2014-06-25
    Type: Initial release
  • Version 1.1: 2014-10-01
    Type: Database references
  • Version 1.2: 2017-11-22
    Type: Database references, Derived calculations, Other, Refinement description, Source and taxonomy