3TJ9

Crystal structure of Helicobacter pylori UreE bound to Zn2+


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystallographic and X-ray absorption spectroscopic characterization of Helicobacter pylori UreE bound to Ni2+ and Zn2+ reveals a role for the disordered C-terminal arm in metal trafficking.

Banaszak, K.Martin-Diaconescu, V.Bellucci, M.Zambelli, B.Rypniewski, W.Maroney, M.J.Ciurli, S.

(2012) Biochem J 441: 1017-1026

  • DOI: https://doi.org/10.1042/BJ20111659
  • Primary Citation of Related Structures:  
    3TJ8, 3TJ9, 3TJA

  • PubMed Abstract: 

    The survival and growth of the pathogen Helicobacter pylori in the gastric acidic environment is ensured by the activity of urease, an enzyme containing two essential Ni²⁺ ions in the active site. The metallo-chaperone UreE facilitates in vivo Ni²⁺ insertion into the apoenzyme. Crystals of apo-HpUreE (H. pylori UreE) and its Ni⁺- and Zn⁺-bound forms were obtained from protein solutions in the absence and presence of the metal ions. The crystal structures of the homodimeric protein, determined at 2.00 Å (apo), 1.59 Å (Ni²⁺) and 2.52 Å (Zn²⁺) resolution, show the conserved proximal and solvent-exposed His¹⁰² residues from two adjacent monomers invariably involved in metal binding. The C-terminal regions of the apoprotein are disordered in the crystal, but acquire significant ordering in the presence of the metal ions due to the binding of His¹⁵². The analysis of X-ray absorption spectral data obtained using solutions of Ni²⁺- and Zn²⁺-bound HpUreE provided accurate information of the metal-ion environment in the absence of solid-state effects. These results reveal the role of the histidine residues at the protein C-terminus in metal-ion binding, and the mutual influence of protein framework and metal-ion stereo-electronic properties in establishing co-ordination number and geometry leading to metal selectivity.


  • Organizational Affiliation

    Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Urease accessory protein ureE
A, B, C, D
170Helicobacter pyloriMutation(s): 0 
Gene Names: ureEHP_0070
UniProt
Find proteins for Q09064 (Helicobacter pylori (strain ATCC 700392 / 26695))
Explore Q09064 
Go to UniProtKB:  Q09064
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ09064
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.52 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.343α = 90
b = 109.343β = 90
c = 280.343γ = 120
Software Package:
Software NamePurpose
MxCuBEdata collection
Auto-Rickshawphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-11-02
    Type: Initial release
  • Version 1.1: 2012-02-01
    Changes: Database references
  • Version 1.2: 2024-02-28
    Changes: Data collection, Database references, Derived calculations