5TCY

A complex of the synthetic siderophore analogue Fe(III)-5-LICAM with CeuE (H227L variant), a periplasmic protein from Campylobacter jejuni.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Interactions of the periplasmic binding protein CeuE with Fe(III) n-LICAM(4-) siderophore analogues of varied linker length.

Wilde, E.J.Hughes, A.Blagova, E.V.Moroz, O.V.Thomas, R.P.Turkenburg, J.P.Raines, D.J.Duhme-Klair, A.K.Wilson, K.S.

(2017) Sci Rep 7: 45941-45941

  • DOI: 10.1038/srep45941
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacteria use siderophores to mediate the transport of essential Fe(III) into the cell. In Campylobacter jejuni the periplasmic binding protein CeuE, an integral part of the Fe(III) transport system, has adapted to bind tetradentate siderophores using ...

    Bacteria use siderophores to mediate the transport of essential Fe(III) into the cell. In Campylobacter jejuni the periplasmic binding protein CeuE, an integral part of the Fe(III) transport system, has adapted to bind tetradentate siderophores using a His and a Tyr side chain to complete the Fe(III) coordination. A series of tetradentate siderophore mimics was synthesized in which the length of the linker between the two iron-binding catecholamide units was increased from four carbon atoms (4-LICAM4-) to five, six and eight (5-, 6-, 8-LICAM4-, respectively). Co-crystal structures with CeuE showed that the inter-planar angles between the iron-binding catecholamide units in the 5-, 6- and 8-LICAM4- structures are very similar (111°, 110° and 110°) and allow for an optimum fit into the binding pocket of CeuE, the inter-planar angle in the structure of 4-LICAM4- is significantly smaller (97°) due to restrictions imposed by the shorter linker. Accordingly, the protein-binding affinity was found to be slightly higher for 5- compared to 4-LICAM4- but decreases for 6- and 8-LICAM4-. The optimum linker length of five matches that present in natural siderophores such as enterobactin and azotochelin. Site-directed mutagenesis was used to investigate the relative importance of the Fe(III)-coordinating residues H227 and Y288.


    Organizational Affiliation

    Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Enterochelin uptake periplasmic binding protein
A, B, C
291Campylobacter jejuni subsp. jejuni serotype O:2 (strain ATCC 700819 / NCTC 11168)Mutation(s): 1 
Gene Names: ceuE
Find proteins for Q0P8Q4 (Campylobacter jejuni subsp. jejuni serotype O:2 (strain ATCC 700819 / NCTC 11168))
Go to UniProtKB:  Q0P8Q4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5LC
Query on 5LC

Download SDF File 
Download CCD File 
A, B, C
N,N'-pentane-1,5-diylbis(2,3-dihydroxybenzamide)
C19 H22 N2 O6
BRWLZTCRFJVZDD-UHFFFAOYSA-N
 Ligand Interaction
FE
Query on FE

Download SDF File 
Download CCD File 
A, B, C
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.171 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 58.696α = 82.09
b = 62.881β = 74.67
c = 69.867γ = 77.60
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Engineering and Physical Sciences Research CouncilUnited KingdomEP/L024829/1

Revision History 

  • Version 1.0: 2017-04-12
    Type: Initial release
  • Version 1.1: 2017-04-19
    Type: Database references
  • Version 1.2: 2017-09-13
    Type: Author supporting evidence