3JVI

Product state mimic crystal structure of protein tyrosine phosphatase from Entamoeba histolytica


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 

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
  • Structures With Same Primary Citation

  • 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.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein tyrosine phosphataseA161Entamoeba histolytica HM-1:IMSSMutation(s): 0 
Gene Names: EHI_153650
Find proteins for C4LSE7 (Entamoeba histolytica)
Explore C4LSE7 
Go to UniProtKB:  C4LSE7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.204 
  • R-Value Observed: 0.206 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.995α = 90
b = 44.995β = 90
c = 133.316γ = 90
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-09-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Source and taxonomy, Version format compliance
  • Version 1.2: 2014-03-12
    Changes: Database references
  • Version 1.3: 2014-04-09
    Changes: Database references
  • Version 1.4: 2017-11-01
    Changes: Refinement description