1BY5

FHUA FROM E. COLI, WITH ITS LIGAND FERRICHROME


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Transmembrane signaling across the ligand-gated FhuA receptor: crystal structures of free and ferrichrome-bound states reveal allosteric changes.

Locher, K.P.Rees, B.Koebnik, R.Mitschler, A.Moulinier, L.Rosenbusch, J.P.Moras, D.

(1998) Cell 95: 771-778

  • Primary Citation of Related Structures:  1BY3

  • PubMed Abstract: 
  • FhuA protein facilitates ligand-gated transport of ferrichrome-bound iron across Escherichia coli outer membranes. X-ray analysis at 2.7 A resolution reveals two distinct conformations in the presence and absence of ferrichrome. The monomeric protein ...

    FhuA protein facilitates ligand-gated transport of ferrichrome-bound iron across Escherichia coli outer membranes. X-ray analysis at 2.7 A resolution reveals two distinct conformations in the presence and absence of ferrichrome. The monomeric protein consists of a hollow, 22-stranded, antiparallel beta barrel (residues 160-714), which is obstructed by a plug (residues 19-159). The binding site of ferrichrome, an aromatic pocket near the cell surface, undergoes minor changes upon association with the ligand. These are propagated and amplified across the plug, eventually resulting in substantially different protein conformations at the periplasmic face. Our findings reveal the mechanism of signal transmission and suggest how the energy-transducing TonB complex senses ligand binding.


    Related Citations: 
    • Crystal Structure of Ferrichrome and a Comparison with the Structure of Ferrichrome A
      Van Der Helm, D.,Baker, J.R.,Eng-Wilmot, D.L.,Hossain, M.B.,Loghry, R.A.
      (1980) J.Am.Chem.Soc. 102: 4224
    • Oligomeric States and Siderophore-Binding of the Ligand-Gated Fhua-Protein Forming Channels Across E. Coli Outer Membranes
      Locher, K.P.,Rosenbusch, J.P.
      (1997) Eur.J.Biochem. 247: 770


    Organizational Affiliation

    Department of Microbiology, Biozentrum, University of Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FERRIC HYDROXAMATE UPTAKE PROTEIN
A
714Escherichia coli (strain K12)Gene Names: fhuA (tonA)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
FhuA, Ferrichrome-iron receptor without ligand
Find proteins for P06971 (Escherichia coli (strain K12))
Go to UniProtKB:  P06971
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FERRICHROME
B
6N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE
Query on FE

Download SDF File 
Download CCD File 
B
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
OES
Query on OES

Download SDF File 
Download CCD File 
A
N-OCTYL-2-HYDROXYETHYL SULFOXIDE
C10 H22 O2 S
IRJUEMKMQDEOTQ-CYBMUJFWSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
AHO
Query on AHO
B
L-PEPTIDE LINKINGC7 H14 N2 O4ALA
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.184 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 132.200α = 90.00
b = 89.400β = 95.40
c = 89.900γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SOLVEphasing
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-01-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance