1FEP

FERRIC ENTEROBACTIN RECEPTOR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the outer membrane active transporter FepA from Escherichia coli.

Buchanan, S.K.Smith, B.S.Venkatramani, L.Xia, D.Esser, L.Palnitkar, M.Chakraborty, R.van der Helm, D.Deisenhofer, J.

(1999) Nat.Struct.Mol.Biol. 6: 56-63

  • DOI: 10.1038/4931

  • PubMed Abstract: 
  • Integral outer membrane receptors for iron chelates and vitamin B12 carry out specific ligand transport against a concentration gradient. Energy for active transport is obtained from the proton-motive force of the inner membrane through physical inte ...

    Integral outer membrane receptors for iron chelates and vitamin B12 carry out specific ligand transport against a concentration gradient. Energy for active transport is obtained from the proton-motive force of the inner membrane through physical interaction with TonB-ExbB-ExbD, an inner membrane complex. Here we report the crystal structure of an active transport, outer membrane receptor at 2.4 A resolution. Two distinct functional domains are revealed: (i) a 22-stranded beta-barrel that spans the outer membrane and contains large extracellular loops which appear to function in ligand binding; and (ii) a globular N-terminal domain that folds into the barrel pore, inhibiting access to the periplasm and contributing two additional loops for potential ligand binding. These loops could provide a signaling pathway between the processes of ligand recognition and TonB-mediated transport. The blockage of the pore suggests that the N-terminal domain must undergo a conformational rearrangement to allow ligand transport into the periplasm.


    Organizational Affiliation

    Howard Hughes Medical Institute, and Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas 75235-9050, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FERRIC ENTEROBACTIN RECEPTOR
A
724Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: fepA (fep, feuB)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Monomeric/Dimeric
Protein: 
FepA, Ferric enterobactin receptor
Find proteins for P05825 (Escherichia coli (strain K12))
Go to UniProtKB:  P05825
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.236 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 112.300α = 90.00
b = 127.600β = 90.00
c = 135.700γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MLPHAREphasing
CNSrefinement
DENZOdata reduction

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: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance