2GOJ

The crystal structure of the enzyme Fe-superoxide dismutase from Plasmodium falciparum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Systematic structural studies of iron superoxide dismutases from human parasites and a statistical coupling analysis of metal binding specificity

Bachega, J.F.Navarro, M.V.Bleicher, L.Bortoleto-Bugs, R.K.Dive, D.Hoffmann, P.Viscogliosi, E.Garratt, R.C.

(2009) Proteins 77: 26-37

  • DOI: 10.1002/prot.22412
  • Primary Citation of Related Structures:  
    3ESF, 2GOJ, 2GPC

  • PubMed Abstract: 
  • Superoxide dismutases (SODs) are a crucial class of enzymes in the combat against intracellular free radical damage. They eliminate superoxide radicals by converting them into hydrogen peroxide and oxygen. In spite of their very different life cycles ...

    Superoxide dismutases (SODs) are a crucial class of enzymes in the combat against intracellular free radical damage. They eliminate superoxide radicals by converting them into hydrogen peroxide and oxygen. In spite of their very different life cycles and infection strategies, the human parasites Plasmodium falciparum, Trypanosoma cruzi and Trypanosoma brucei are known to be sensitive to oxidative stress. Thus the parasite Fe-SODs have become attractive targets for novel drug development. Here we report the crystal structures of FeSODs from the trypanosomes T. brucei at 2.0 A and T. cruzi at 1.9 A resolution, and that from P. falciparum at a higher resolution (2.0 A) to that previously reported. The homodimeric enzymes are compared to the related human MnSOD with particular attention to structural aspects which are relevant for drug design. Although the structures possess a very similar overall fold, differences between the enzymes at the entrance to the channel which leads to the active site could be identified. These lead to a slightly broader and more positively charged cavity in the parasite enzymes. Furthermore, a statistical coupling analysis (SCA) for the whole Fe/MnSOD family reveals different patterns of residue coupling for Mn and Fe SODs, as well as for the dimeric and tetrameric states. In both cases, the statistically coupled residues lie adjacent to the conserved core surrounding the metal center and may be expected to be responsible for its fine tuning, leading to metal ion specificity.


    Organizational Affiliation

    Institute of Physics of São Carlos, University of São Paulo, CEP 13560-970, São Carlos, SP, Brazil.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fe-superoxide dismutaseAB197Plasmodium falciparum HB3Mutation(s): 0 
Gene Names: SODSODB
EC: 1.15.1.1
Find proteins for Q27740 (Plasmodium falciparum (isolate HB3))
Explore Q27740 
Go to UniProtKB:  Q27740
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FE2
Query on FE2

Download CCD File 
A, B
FE (II) ION
Fe
CWYNVVGOOAEACU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.402α = 90
b = 78.417β = 90
c = 88.369γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-08-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance