Crystal structure of the Trypanosoma cruzi protein tyrosine phosphatase TcPTP1, a potential therapeutic target for Chagas' disease

Experimental Data Snapshot

  • Resolution: 2.18 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 

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Structure of the Trypanosoma Cruzi Protein Tyrosine Phosphatase Tcptp1, a Potential Therapeutic Target for Chagas' Disease.

Lountos, G.T.Tropea, J.E.Waugh, D.S.

(2012) Mol Biochem Parasitol 187: 1

  • DOI: https://doi.org/10.1016/j.molbiopara.2012.10.006
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Chagas' disease, a neglected tropical affliction transmitted by the flagellated protozoan Trypanosoma cruzi, is prevalent in Latin America and affects nearly 18 million people worldwide, yet few approved drugs are available to treat the disease. Moreover, the currently available drugs exhibit severe toxicity or are poorly effective in the chronic phase of the disease. This limitation, along with the large population at risk, underscores the urgent need to discover new molecular targets and novel therapeutic agents. Recently, the T. cruzi protein tyrosine phosphatase TcPTP1 has been implicated in the cellular differentiation and infectivity of the parasite and is therefore a promising target for the design of novel anti-parasitic drugs. Here, we report the X-ray crystal structure of TcPTP1 refined to a resolution of 2.18 Å, which provides structural insights into the active site environment that can be used to initiate structure-based drug design efforts to develop specific TcPTP1 inhibitors. Potential strategies to develop such inhibitors are also discussed.

  • Organizational Affiliation

    Basic Science Program, SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA. lountosg@mail.nih.gov

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
302Trypanosoma cruziMutation(s): 0 
Find proteins for Q4E4C8 (Trypanosoma cruzi (strain CL Brener))
Explore Q4E4C8 
Go to UniProtKB:  Q4E4C8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4E4C8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.18 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 154.285α = 90
b = 154.285β = 90
c = 195.746γ = 120
Software Package:
Software NamePurpose
HKL-3000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-11-21
    Type: Initial release
  • Version 1.1: 2013-01-16
    Changes: Database references
  • Version 1.2: 2013-02-13
    Changes: Database references
  • Version 1.3: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description