3ILY

Apo crystal structure of protein tyrosine phosphatase from Entamoeba histolytica featuring a disordered active site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystal structure and putative substrate identification for the Entamoeba histolytica low molecular weight tyrosine phosphatase.

Linford, A.S.Jiang, N.M.Edwards, T.E.Sherman, N.E.Van Voorhis, W.C.Stewart, L.J.Myler, P.J.Staker, B.L.Petri, W.A.

(2014) Mol.Biochem.Parasitol. 193: 33-44

  • DOI: 10.1016/j.molbiopara.2014.01.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Entamoeba histolytica is a eukaryotic intestinal parasite of humans, and is endemic in developing countries. We have characterized the E. histolytica putative low molecular weight protein tyrosine phosphatase (LMW-PTP). The structure for this amebic ...

    Entamoeba histolytica is a eukaryotic intestinal parasite of humans, and is endemic in developing countries. We have characterized the E. histolytica putative low molecular weight protein tyrosine phosphatase (LMW-PTP). The structure for this amebic tyrosine phosphatase was solved, showing the ligand-induced conformational changes necessary for binding of substrate. In amebae, it was expressed at low but detectable levels as detected by immunoprecipitation followed by immunoblotting. A mutant LMW-PTP protein in which the catalytic cysteine in the active site was replaced with a serine lacked phosphatase activity, and was used to identify a number of trapped putative substrate proteins via mass spectrometry analysis. Seven of these putative substrate protein genes were cloned with an epitope tag and overexpressed in amebae. Five of these seven putative substrate proteins were demonstrated to interact specifically with the mutant LMW-PTP. This is the first biochemical study of a small tyrosine phosphatase in Entamoeba, and sets the stage for understanding its role in amebic biology and pathogenesis.


    Organizational Affiliation

    Division of Infectious Diseases and International Health, University of Virginia Health System, Charlottesville, VA 22908, USA; Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA; Department of Pathology, University of Virginia, Charlottesville, VA 22908, USA. Electronic address: wap3g@virginia.edu.,Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA; Department of Medicine, University of Washington, Seattle, WA 98195, USA.,Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA 22908, USA.,Division of Infectious Diseases and International Health, University of Virginia Health System, Charlottesville, VA 22908, USA.,Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA; Seattle Biomedical Research Institute, Seattle, WA 98109, USA; Departments of Global Health and Medical Education & Biomedical Informatics, University of Washington, Seattle, WA 98195, USA.,Department of Biochemistry and Molecular Genetics, University of Virginia Health System, Charlottesville, VA 22908, USA. Electronic address: asl2c@virginia.edu.,Seattle Structural Genomics Center for Infectious Disease (SSGCID), USA; Emerald Bio, Bainbridge Island, WA 98110, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein tyrosine phosphatase, putative
A, B
178Entamoeba histolyticaMutation(s): 0 
Find proteins for C4LSE7 (Entamoeba histolytica)
Go to UniProtKB:  C4LSE7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.209 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 45.674α = 90.00
b = 45.674β = 90.00
c = 132.329γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
PDB_EXTRACTdata extraction
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-03-12
    Type: Database references
  • Version 1.3: 2014-04-09
    Type: Database references
  • Version 1.4: 2017-11-01
    Type: Refinement description