Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 30.46 kDa 
• Atom Count: 2183 
• Modelled Residue Count: 262 
• Deposited Residue Count: 266 
• Unique protein chains: 1

1EFD

PERIPLASMIC FERRIC SIDEROPHORE BINDING PROTEIN FHUD COMPLEXED WITH GALLICHROME

• PDB DOI: 10.2210/pdb1EFD/pdb

• Classification: METAL TRANSPORT
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-02-07 Released: 2000-04-05 
• Deposition Author(s): Clarke, T.E., Ku, S.-Y., Dougan, D.R., Vogel, H.J., Tari, L.W.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.250 
• R-Value Work: 0.218 

Literature

The structure of the ferric siderophore binding protein FhuD complexed with gallichrome.

Clarke, T.E., Ku, S.Y., Dougan, D.R., Vogel, H.J., Tari, L.W.

(2000) Nat Struct Biol 7: 287-291

• PubMed: 10742172 
• DOI: 10.1038/74048
• Primary Citation of Related Structures:  
  1EFD


• PubMed Abstract: 
  

Siderophore binding proteins play a key role in the uptake of iron in many gram-positive and gram-negative bacteria. FhuD is a soluble periplasmic binding protein that transports ferrichrome and other hydroxamate siderophores. The crystal structure of FhuD from Escherichia coli in complex with the ferrichrome homolog gallichrome has been determined at 1.9 ¿ resolution, the first structure of a periplasmic binding protein involved in the uptake of siderophores. Gallichrome is held in a shallow pocket lined with aromatic groups; Arg and Tyr side chains interact directly with the hydroxamate moieties of the siderophore. FhuD possesses a novel fold, suggesting that its mechanisms of ligand binding and release are different from other structurally characterized periplasmic ligand binding proteins.

---

Organizational Affiliation: 

Department of Biological Sciences, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, Canada T2N 1N4.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FERRICHROME-BINDING PERIPLASMIC PROTEIN	A [auth N]	266	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P07822 (Escherichia coli (strain K12)) Explore P07822  Go to UniProtKB:  P07822

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GCR	B [auth N]	GALLICHROME C28 H44 Ga N9 O13 BEDMDXBTNSVNGS-GSJIPYROSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.250 
• R-Value Work: 0.218 
• Space Group: P 6₃

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.54	α = 90
b = 86.54	β = 90
c = 91.77	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-02-07 
• Released Date: 2000-04-05 
Deposition Author(s): Clarke, T.E., Ku, S.-Y., Dougan, D.R., Vogel, H.J., Tari, L.W.

Revision History  

• Version 1.0: 2000-04-05
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance