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3i80

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[[Image:3i80.png|left|200px]]
 
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==Protein Tyrosine Phosphatase 1B - Transition state analog for the second catalytic step==
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The line below this paragraph, containing "STRUCTURE_3i80", creates the "Structure Box" on the page.
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<StructureSection load='3i80' size='340' side='right'caption='[[3i80]], [[Resolution|resolution]] 2.25&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[3i80]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3I80 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3I80 FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.25&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene>, <scene name='pdbligand=VO4:VANADATE+ION'>VO4</scene></td></tr>
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{{STRUCTURE_3i80| PDB=3i80 | SCENE= }}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3i80 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3i80 OCA], [https://pdbe.org/3i80 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3i80 RCSB], [https://www.ebi.ac.uk/pdbsum/3i80 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3i80 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PTN1_HUMAN PTN1_HUMAN] Tyrosine-protein phosphatase which acts as a regulator of endoplasmic reticulum unfolded protein response. Mediates dephosphorylation of EIF2AK3/PERK; inactivating the protein kinase activity of EIF2AK3/PERK. May play an important role in CKII- and p60c-src-induced signal transduction cascades. May regulate the EFNA5-EPHA3 signaling pathway which modulates cell reorganization and cell-cell repulsion.<ref>PMID:21135139</ref> <ref>PMID:22169477</ref>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/i8/3i80_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=3i80 ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Catalysis by protein-tyrosine phosphatase 1B (PTP1B) occurs through a two-step mechanism involving a phosphocysteine intermediate. We have solved crystal structures for the transition state analogs for both steps. Together with previously reported crystal structures of apo-PTP1B, the Michaelis complex of an inactive mutant, the phosphoenzyme intermediate, and the product complex, a full picture of all catalytic steps can now be depicted. The transition state analog for the first catalytic step comprises a ternary complex between the catalytic cysteine of PTP1B, vanadate, and the peptide DADEYL, a fragment of a physiological substrate. The equatorial vanadate oxygen atoms bind to the P-loop, and the apical positions are occupied by the peptide tyrosine oxygen and by the PTP1B cysteine sulfur atom. The vanadate assumes a trigonal bipyramidal geometry in both transition state analog structures, with very similar apical O-O distances, denoting similar transition states for both phosphoryl transfer steps. Detailed interactions between the flanking peptide and the enzyme are discussed.
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===Protein Tyrosine Phosphatase 1B - Transition state analog for the second catalytic step===
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Insights into the reaction of protein-tyrosine phosphatase 1B: crystal structures for transition state analogs of both catalytic steps.,Brandao TA, Hengge AC, Johnson SJ J Biol Chem. 2010 May 21;285(21):15874-83. Epub 2010 Mar 16. PMID:20236928<ref>PMID:20236928</ref>
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 3i80" style="background-color:#fffaf0;"></div>
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==See Also==
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The line below this paragraph, {{ABSTRACT_PUBMED_20236928}}, adds the Publication Abstract to the page
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*[[Tyrosine phosphatase 3D structures|Tyrosine phosphatase 3D structures]]
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(as it appears on PubMed at http://www.pubmed.gov), where 20236928 is the PubMed ID number.
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== References ==
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<references/>
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{{ABSTRACT_PUBMED_20236928}}
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__TOC__
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</StructureSection>
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==About this Structure==
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[[3i80]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3I80 OCA].
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==Reference==
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<ref group="xtra">PMID:20236928</ref><references group="xtra"/>
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[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Protein-tyrosine-phosphatase]]
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[[Category: Large Structures]]
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[[Category: Brandao, T A.S.]]
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[[Category: Brandao TAS]]
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[[Category: Hengge, A C.]]
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[[Category: Hengge AC]]
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[[Category: Johnson, S J.]]
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[[Category: Johnson SJ]]
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[[Category: Acetylation]]
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[[Category: Endoplasmic reticulum]]
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[[Category: Hydrolase]]
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[[Category: Membrane]]
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[[Category: Oxidation]]
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[[Category: P-loop]]
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[[Category: Phosphoprotein]]
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[[Category: Polymorphism]]
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[[Category: Protein phosphatase]]
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[[Category: Vanadate]]
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[[Category: Wpd-loop]]
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Current revision

Protein Tyrosine Phosphatase 1B - Transition state analog for the second catalytic step

PDB ID 3i80

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