Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 34137.90 
• Atom Count: 2104 
• Residue Count: 300 
• Unique protein chains: 1

2W57

Crystal structure of the Vibrio cholerae ferric uptake regulator (Fur) reveals structural rearrangement of the DNA-binding domains

• DOI: 10.2210/pdb2W57/pdb

• Classification: METAL TRANSPORT
• Organism(s): Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2008-12-05 Released: 2009-01-20 
• Deposition Author(s): Sheikh, M.A., Taylor, G.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.6 Å
• R-Value Free: 0.259 
• R-Value Work: 0.216 

Literature

Crystal Structure of the Vibrio Cholerae Ferric Uptake Regulator (Fur) Reveals Insights Into Metal Co-Ordination.

Sheikh, M.A., Taylor, G.L.

(2009) Mol.Microbiol. 72: 1208

• PubMed: 19400801 
• DOI: 10.1111/j.1365-2958.2009.06718.x


• PubMed Abstract: 
  

The ferric uptake regulator (Fur) is a metal-dependent DNA-binding protein that acts as both a repressor and an activator of numerous genes involved in maintaining iron homeostasis in bacteria. It has also been demonstrated in Vibrio cholerae that Fur plays an additional role in pathogenesis, opening up the potential of Fur as a drug target for cholera. Here we present the crystal structure of V. cholerae Fur that reveals a very different orientation of the DNA-binding domains compared with that observed in Pseudomonas aeruginosa Fur. Each monomer of the dimeric Fur protein contains two metal binding sites occupied by zinc in the crystal structure. In the P. aeruginosa study these were designated as the regulatory site (Zn1) and structural site (Zn2). This V. cholerae Fur study, together with studies on Fur homologues and paralogues, suggests that in fact the Zn2 site is the regulatory iron binding site and the Zn1 site plays an auxiliary role. There is no evidence of metal binding to the cysteines that are conserved in many Fur homologues, including Escherichia coli Fur. An analysis of the metal binding properties shows that V. cholerae Fur can be activated by a range of divalent metals.

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Organizational Affiliation: 

Centre for Biomolecular Sciences, University of St Andrews, St Andrews, Fife KY16 9ST, UK.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
FERRIC UPTAKE REGULATION PROTEIN	A, B	150	Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)	Mutation(s): 0  Gene Names: fur
Find proteins for P0C6C8 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)) Go to UniProtKB:  P0C6C8

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A, B	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.6 Å
• R-Value Free: 0.259 
• R-Value Work: 0.216 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 88.880	α = 90.00
b = 88.880	β = 90.00
c = 85.070	γ = 90.00

Software Package:

Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
MOSFLM	data reduction
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-12-05 
• Released Date: 2009-01-20 
• Deposition Author(s): Sheikh, M.A., Taylor, G.L.

Revision History 

• Version 1.0: 2009-01-20
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Version format compliance