1BY5

FHUA FROM E. COLI, WITH ITS LIGAND FERRICHROME


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 

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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

  • DOI: 10.1016/s0092-8674(00)81700-6
  • Primary Citation of Related Structures:  
    1BY3, 1BY5

  • 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 consists of a hollow, 22-stranded, antiparallel beta barrel (residues 160-714), which is obstructed by a plug (residues 19-159) ...

    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: 
    • 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
    • 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

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FERRIC HYDROXAMATE UPTAKE PROTEINA714Escherichia coliMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P06971 (Escherichia coli (strain K12))
Explore P06971 
Go to UniProtKB:  P06971
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
FERRICHROMEB6Ustilago sphaerogenaMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.184 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 132.2α = 90
b = 89.4β = 95.4
c = 89.9γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

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