Crystal structure of a putative iron superoxide dismutase from Trypanosoma cruzi bound to iron

Experimental Data Snapshot

  • Resolution: 2.25 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Iron superoxide dismutases in eukaryotic pathogens: new insights from Apicomplexa and Trypanosoma structures.

Phan, I.Q.Davies, D.R.Moretti, N.S.Shanmugam, D.Cestari, I.Anupama, A.Fairman, J.W.Edwards, T.E.Stuart, K.Schenkman, S.Myler, P.J.

(2015) Acta Crystallogr F Struct Biol Commun 71: 615-621

  • DOI: https://doi.org/10.1107/S2053230X15004185
  • Primary Citation of Related Structures:  
    4F2N, 4H3E, 4YET

  • PubMed Abstract: 

    Prior studies have highlighted the potential of superoxide dismutases as drug targets in eukaryotic pathogens. This report presents the structures of three iron-dependent superoxide dismutases (FeSODs) from Trypanosoma cruzi, Leishmania major and Babesia bovis. Comparison with existing structures from Plasmodium and other trypanosome isoforms shows a very conserved overall fold with subtle differences. In particular, structural data suggest that B. bovis FeSOD may display similar resistance to peroxynitrite-mediated inactivation via an intramolecular electron-transfer pathway as previously described in T. cruzi FeSOD isoform B, thus providing valuable information for structure-based drug design. Furthermore, lysine-acetylation results in T. cruzi indicate that acetylation occurs at a position close to that responsible for the regulation of acetylation-mediated activity in the human enzyme.

  • Organizational Affiliation

    Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Superoxide dismutase
A, B
241Trypanosoma cruzi strain CL BrenerMutation(s): 0 
Gene Names: Tc00.1047053509775.40
Find proteins for Q4DCQ3 (Trypanosoma cruzi (strain CL Brener))
Explore Q4DCQ3 
Go to UniProtKB:  Q4DCQ3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4DCQ3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.65α = 90
b = 75.68β = 90
c = 117.45γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-26
    Type: Initial release
  • Version 1.1: 2015-06-03
    Changes: Database references
  • Version 1.2: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description