View source for 3zmq


==Src-derived mutant peptide inhibitor complex of PTP1B==
<StructureSection load='3zmq' size='340' side='right'caption='[[3zmq]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3zmq]] is a 2 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=3ZMQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ZMQ 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]] 3.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FTY:DEOXY-DIFLUOROMETHELENE-PHOSPHOTYROSINE'>FTY</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=3zmq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3zmq OCA], [https://pdbe.org/3zmq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3zmq RCSB], [https://www.ebi.ac.uk/pdbsum/3zmq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3zmq ProSAT]</span></td></tr>
</table>
== Function ==
[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> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Protein tyrosine phosphatases (PTPs) play crucial roles in health and disease. Chemical modulators of their activity are vital tools to study their function. An important aspect is the accessibility of these tools, which is usually limited or not existent due to the required, often complex synthesis of the molecules. We describe here a strategy for the development of cellular active inhibitors and in-cell detection tools for PTP1B as a model PTP, which plays important roles in diabetes, obesity, and cancer. The tool compounds are based on a peptide sequence from PTP1B's substrate Src, and the resulting compounds are commercially accessible through standard peptide synthesis. The peptide inhibitor is remarkably selective against a panel of PTPs. We provide the co-crystal structure of PTP1B with the sequence from Src and the optimized peptide inhibitor, showing the molecular basis of the interaction of PTP1B with part of its natural substrate and explaining the crucial interactions to enhance binding affinity, which are made possible by simple optimization of the sequence. Our approach enables the broad accessibility of PTP1B tools to researchers and has the potential for the systematic development of accessible PTP modulators to enable the study of PTPs.

Development of Accessible Peptidic Tool Compounds To Study the Phosphatase PTP1B in Intact Cells.,Meyer C, Hoeger B, Temmerman K, Tatarek-Nossol M, Pogenberg V, Bernhagen J, Wilmanns M, Kapurniotu A, Kohn M ACS Chem Biol. 2014 Jan 15. PMID:24387659<ref>PMID:24387659</ref>

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

==See Also==
*[[Tyrosine phosphatase 3D structures|Tyrosine phosphatase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Koehn M]]
[[Category: Meyer C]]
[[Category: Pogenberg V]]
[[Category: Temmerman K]]
[[Category: Wilmanns M]]