Crystal structure of Schistosoma mansoni Thioredoxin at 1.6 Angstrom

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 

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Structural and Functional Characterization of Schistosoma Mansoni Thioredoxin.

Boumis, G.Angelucci, F.Bellelli, A.Brunori, M.Dimastrogiovanni, D.Miele, A.E.

(2011) Protein Sci 20: 1069

  • DOI: https://doi.org/10.1002/pro.634
  • Primary Citation of Related Structures:  
    2XBI, 2XBQ, 2XC2

  • PubMed Abstract: 

    Schistosomiasis, the human parasitosis caused by various species of the blood-fluke Schistosoma, is a debilitating disease affecting 200 million people in tropical areas. The massive administration of the only effective drug, praziquantel, leads to the appearance of less sensitive parasite strains, thus, making urgent the search for new therapeutic approaches and new suitable targets. The thiol-mediated detoxification pathway has been identified as a promising target, being essential during all the parasite developmental stages and sufficiently different from the host counterpart. As a part of a project aimed at the structural characterization of all the proteins involved in this pathway, we describe hereby the high-resolution crystal structure of Schistosoma mansoni Thioredoxin (SmTrx) in three states, namely: the wild-type oxidized adult enzyme and the oxidized and reduced forms of a juvenile isoform, carrying an N-terminal extension. SmTrx shows a typical thioredoxin fold, highly similar to the other components of the superfamily. Although probably unlikely to be a reasonable drug target given its high similarity with the human counterpart, SmTrx completes the characterization of the whole set of thiol-mediated detoxification pathway components. Moreover, it can reduce oxidized glutathione and is one of the few defence proteins expressed in mature eggs and in the hatch fluid, thus confirming an important role in the parasite. We believe its crystal structure may provide clues for the formation of granulomas and the pathogenesis of the chronic disease.

  • Organizational Affiliation

    Dipartimento di Scienze Biochimiche and Istituto Pasteur-Fondazione Cenci Bolognetti, "Sapienza" University of Rome, P.le Aldo Moro 5, 00185 Rome, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
THIOREDOXIN108Schistosoma mansoniMutation(s): 0 
Find proteins for Q8T9N5 (Schistosoma mansoni)
Explore Q8T9N5 
Go to UniProtKB:  Q8T9N5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8T9N5
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GOL

Download Ideal Coordinates CCD File 
C3 H8 O3
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39.213α = 90
b = 46.769β = 90
c = 56.408γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2012-04-25
    Changes: Database references, Non-polymer description, Version format compliance
  • Version 1.2: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description