View source for 3js5


==Crystal structure of protein tyrosine phosphatase from Entamoeba histolytica with Hepes in the active site. High resolution, alternative crystal form with 1 molecule in asymmetric unit==
<StructureSection load='3js5' size='340' side='right'caption='[[3js5]], [[Resolution|resolution]] 1.94&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3js5]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Entamoeba_histolytica_HM-1:IMSS Entamoeba histolytica HM-1:IMSS]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3JS5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3JS5 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.94&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EPE:4-(2-HYDROXYETHYL)-1-PIPERAZINE+ETHANESULFONIC+ACID'>EPE</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3js5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3js5 OCA], [https://pdbe.org/3js5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3js5 RCSB], [https://www.ebi.ac.uk/pdbsum/3js5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3js5 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C4LSE7_ENTH1 C4LSE7_ENTH1] 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/js/3js5_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3js5 ConSurf].
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== Publication Abstract from PubMed ==
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.

Crystal structure and putative substrate identification for the Entamoeba histolytica low molecular weight tyrosine phosphatase.,Linford AS, Jiang NM, Edwards TE, Sherman NE, Van Voorhis WC, Stewart LJ, Myler PJ, Staker BL, Petri WA Jr Mol Biochem Parasitol. 2014 Feb 15;193(1):33-44. doi:, 10.1016/j.molbiopara.2014.01.003. PMID:24548880<ref>PMID:24548880</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3js5" style="background-color:#fffaf0;"></div>

==See Also==
*[[Tyrosine phosphatase 3D structures|Tyrosine phosphatase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Entamoeba histolytica HM-1:IMSS]]
[[Category: Large Structures]]