Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 15.67 kDa 
• Atom Count: 1168 
• Modelled Residue Count: 133 
• Deposited Residue Count: 136 
• Unique protein chains: 1

1MZB

Ferric uptake regulator

• DOI: 10.2210/pdb1MZB/pdb

• Classification: GENE REGULATION
• Organism(s): Pseudomonas aeruginosa
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-10-07 Released: 2003-10-07 
• Deposition Author(s): Pohl, E., Vasil, M.L., Haller, J.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.254 
• R-Value Work: 0.226 

Literature

Architecture of a protein central to iron homeostatis: Crystal structure and spectroscopic analysis of the Ferric uptake regulator

Pohl, E., Haller, J.C., Mijovilovich, A., Meyer-Klaucke, W., Garman, E., Vasil, M.L.

(2003) Mol Microbiol 47: 903-915

• PubMed: 12581348 
• DOI: 10.1046/j.1365-2958.2003.03337.x
• Primary Citation of Related Structures:  
  1MZB


• PubMed Abstract: 
  

Iron is an essential element for almost all organisms, although an overload of this element results in toxicity because of the formation of hydroxyl radicals. Consequently, most living entities have developed sophisticated mechanisms to control their intracellular iron concentration. In many bacteria, including the opportunistic pathogen Pseudomonas aeruginosa, this task is performed by the ferric uptake regulator (Fur). Fur controls a wide variety of basic physiological processes including iron uptake systems and the expression of exotoxin A. Here, we present the first crystal structure of Fur from P. aeruginosa in complex with Zn2+ determined at a resolution of 1.8 A. Furthermore, X-ray absorption spectroscopic measurements and microPIXE analysis were performed in order to characterize the distinct zinc and iron binding sites in solution. The combination of these complementary techniques enables us to present a model for the activation and DNA binding of the Fur protein.

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Organizational Affiliation: 

European Molecular Biology Laboratory, Hamburg Outstation, Notkestr. 85, D-22603 Hamburg, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ferric uptake regulation protein	A	136	Pseudomonas aeruginosa	Mutation(s): 0
Find proteins for Q03456 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore Q03456  Go to UniProtKB:  Q03456

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	B [auth A], C [auth A], D [auth A], E [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.254 
• R-Value Work: 0.226 
• Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 63.3	α = 90
b = 63.3	β = 90
c = 180.1	γ = 90

Software Package:

Software Name	Purpose
MAR345	data collection
DENZO	data reduction
SHELXS	phasing
CNS	refinement
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-10-07 
• Released Date: 2003-10-07 
Deposition Author(s): Pohl, E., Vasil, M.L., Haller, J.C.

Revision History  

• Version 1.0: 2003-10-07
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description