Crystal structure of the ferric enterobactin receptor (PfeA) from Pseudomonas aeruginosa in complex with the tris-catechol vector

Experimental Data Snapshot

  • Resolution: 2.57 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 

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Hijacking of the Enterobactin Pathway by a Synthetic Catechol Vector Designed for Oxazolidinone Antibiotic Delivery in Pseudomonas aeruginosa.

Moynie, L.Hoegy, F.Milenkovic, S.Munier, M.Paulen, A.Gasser, V.Faucon, A.L.Zill, N.Naismith, J.H.Ceccarelli, M.Schalk, I.J.Mislin, G.L.A.

(2022) ACS Infect Dis 

  • DOI: https://doi.org/10.1021/acsinfecdis.2c00202
  • Primary Citation of Related Structures:  
    5NC3, 6Y47, 6YY5, 6Z2N, 6Z33, 7OBW

  • PubMed Abstract: 

    Enterobactin (ENT) is a tris-catechol siderophore used to acquire iron by multiple bacterial species. These ENT-dependent iron uptake systems have often been considered as potential gates in the bacterial envelope through which one can shuttle antibiotics (Trojan horse strategy). In practice, siderophore analogues containing catechol moieties have shown promise as vectors to which antibiotics may be attached. Bis- and tris-catechol vectors (BCVs and TCVs, respectively) were shown using structural biology and molecular modeling to mimic ENT binding to the outer membrane transporter PfeA in Pseudomonas aeruginosa . TCV but not BCV appears to cross the outer membrane via PfeA when linked to an antibiotic (linezolid). TCV is therefore a promising vector for Trojan horse strategies against P. aeruginosa , confirming the ENT-dependent iron uptake system as a gate to transport antibiotics into P. aeruginosa cells.

  • Organizational Affiliation

    The Rosalind Franklin Institute, Harwell Campus, Oxfordshire OX11 0QS, U.K.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ferric enterobactin receptor724Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: pfeAPA2688
Membrane Entity: Yes 
Find proteins for Q05098 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q05098 
Go to UniProtKB:  Q05098
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ05098
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 8SW

Download Ideal Coordinates CCD File 
C [auth A]~{N}-[2-[[(2~{S})-2-[[2,3-bis(oxidanyl)phenyl]carbonylamino]-3-[[(2~{S})-2-[[2,3-bis(oxidanyl)phenyl]carbonylamino]-3-oxidanylidene-3-(prop-2-ynylamino)propyl]amino]-3-oxidanylidene-propyl]amino]-2-oxidanylidene-ethyl]-2,3-bis(oxidanyl)benzamide
C32 H32 N6 O12
Query on FE

Download Ideal Coordinates CCD File 
B [auth A]FE (III) ION
Experimental Data & Validation

Experimental Data

  • Resolution: 2.57 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.219 
  • R-Value Observed: 0.221 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.697α = 90
b = 155.171β = 90
c = 77.796γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-03-21
    Type: Initial release
  • Version 1.1: 2022-08-17
    Changes: Database references