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| | <StructureSection load='3zmp' size='340' side='right'caption='[[3zmp]], [[Resolution|resolution]] 2.62Å' scene=''> | | <StructureSection load='3zmp' size='340' side='right'caption='[[3zmp]], [[Resolution|resolution]] 2.62Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[3zmp]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3ZMP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ZMP FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[3zmp]] is a 4 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=3ZMP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3ZMP FirstGlance]. <br> |
| - | </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=FTY:DEOXY-DIFLUOROMETHELENE-PHOSPHOTYROSINE'>FTY</scene></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.619Å</td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Protein-tyrosine-phosphatase Protein-tyrosine-phosphatase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.48 3.1.3.48] </span></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=3zmp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3zmp OCA], [https://pdbe.org/3zmp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3zmp RCSB], [https://www.ebi.ac.uk/pdbsum/3zmp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3zmp ProSAT]</span></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=3zmp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3zmp OCA], [https://pdbe.org/3zmp PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3zmp RCSB], [https://www.ebi.ac.uk/pdbsum/3zmp PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3zmp ProSAT]</span></td></tr> |
| | </table> | | </table> |
| - | == Disease == | |
| - | [[https://www.uniprot.org/uniprot/SRC_HUMAN SRC_HUMAN]] Note=SRC kinase activity has been shown to be increased in several tumor tissues and tumor cell lines such as colon carcinoma cells. | |
| | == Function == | | == 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> [[https://www.uniprot.org/uniprot/SRC_HUMAN SRC_HUMAN]] Non-receptor protein tyrosine kinase which is activated following engagement of many different classes of cellular receptors including immune response receptors, integrins and other adhesion receptors, receptor protein tyrosine kinases, G protein-coupled receptors as well as cytokine receptors. Participates in signaling pathways that control a diverse spectrum of biological activities including gene transcription, immune response, cell adhesion, cell cycle progression, apoptosis, migration, and transformation. Due to functional redundancy between members of the SRC kinase family, identification of the specific role of each SRC kinase is very difficult. SRC appears to be one of the primary kinases activated following engagement of receptors and plays a role in the activation of other protein tyrosine kinase (PTK) families. Receptor clustering or dimerization leads to recruitment of SRC to the receptor complexes where it phosphorylates the tyrosine residues within the receptor cytoplasmic domains. Plays an important role in the regulation of cytoskeletal organization through phosphorylation of specific substrates such as AFAP1. Phosphorylation of AFAP1 allows the SRC SH2 domain to bind AFAP1 and to localize to actin filaments. Cytoskeletal reorganization is also controlled through the phosphorylation of cortactin (CTTN). When cells adhere via focal adhesions to the extracellular matrix, signals are transmitted by integrins into the cell resulting in tyrosine phosphorylation of a number of focal adhesion proteins, including PTK2/FAK1 and paxillin (PXN). In addition to phosphorylating focal adhesion proteins, SRC is also active at the sites of cell-cell contact adherens junctions and phosphorylates substrates such as beta-catenin (CTNNB1), delta-catenin (CTNND1), and plakoglobin (JUP). Another type of cell-cell junction, the gap junction, is also a target for SRC, which phosphorylates connexin-43 (GJA1). SRC is implicated in regulation of pre-mRNA-processing and phosphorylates RNA-binding proteins such as KHDRBS1. Also plays a role in PDGF-mediated tyrosine phosphorylation of both STAT1 and STAT3, leading to increased DNA binding activity of these transcription factors. Involved in the RAS pathway through phosphorylation of RASA1 and RASGRF1. Plays a role in EGF-mediated calcium-activated chloride channel activation. Required for epidermal growth factor receptor (EGFR) internalization through phosphorylation of clathrin heavy chain (CLTC and CLTCL1) at 'Tyr-1477'. Involved in beta-arrestin (ARRB1 and ARRB2) desensitization through phosphorylation and activation of ADRBK1, leading to beta-arrestin phosphorylation and internalization. Has a critical role in the stimulation of the CDK20/MAPK3 mitogen-activated protein kinase cascade by epidermal growth factor. Might be involved not only in mediating the transduction of mitogenic signals at the level of the plasma membrane but also in controlling progression through the cell cycle via interaction with regulatory proteins in the nucleus. Plays an important role in osteoclastic bone resorption in conjunction with PTK2B/PYK2. Both the formation of a SRC-PTK2B/PYK2 complex and SRC kinase activity are necessary for this function. Recruited to activated integrins by PTK2B/PYK2, thereby phosphorylating CBL, which in turn induces the activation and recruitment of phosphatidylinositol 3-kinase to the cell membrane in a signaling pathway that is critical for osteoclast function. Promotes energy production in osteoclasts by activating mitochondrial cytochrome C oxidase. Phosphorylates DDR2 on tyrosine residues, thereby promoting its subsequent autophosphorylation. Phosphorylates RUNX3 and COX2 on tyrosine residues, TNK2 on 'Tyr-284' and CBL on 'Tyr-731'. Enhances DDX58/RIG-I-elicited antiviral signaling. Phosphorylates PDPK1 at 'Tyr-9', 'Tyr-373' and 'Tyr-376'. Phosphorylates BCAR1 at 'Tyr-128'.<ref>PMID:3093483</ref> <ref>PMID:2498394</ref> <ref>PMID:7853507</ref> <ref>PMID:8759729</ref> <ref>PMID:8755529</ref> <ref>PMID:11389730</ref> <ref>PMID:12615910</ref> <ref>PMID:14585963</ref> <ref>PMID:16186108</ref> <ref>PMID:18586953</ref> <ref>PMID:19419966</ref> <ref>PMID:20100835</ref> <ref>PMID:21309750</ref> <ref>PMID:21411625</ref> <ref>PMID:22710723</ref>
| + | [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;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Human]] | + | [[Category: Homo sapiens]] |
| | [[Category: Large Structures]] | | [[Category: Large Structures]] |
| - | [[Category: Protein-tyrosine-phosphatase]]
| + | [[Category: Koehn M]] |
| - | [[Category: Koehn, M]] | + | [[Category: Meyer C]] |
| - | [[Category: Meyer, C]] | + | [[Category: Pogenberg V]] |
| - | [[Category: Pogenberg, V]] | + | [[Category: Temmerman K]] |
| - | [[Category: Temmerman, K]] | + | [[Category: Wilmanns M]] |
| - | [[Category: Wilmanns, M]] | + | |
| - | [[Category: Enzyme inhibitor]]
| + | |
| - | [[Category: Hydrolase-peptide complex]]
| + | |
| - | [[Category: Structure-activity relationship]]
| + | |
| - | [[Category: Transferase]]
| + | |
| Structural highlights
Function
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.[1] [2]
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[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Nievergall E, Janes PW, Stegmayer C, Vail ME, Haj FG, Teng SW, Neel BG, Bastiaens PI, Lackmann M. PTP1B regulates Eph receptor function and trafficking. J Cell Biol. 2010 Dec 13;191(6):1189-203. doi: 10.1083/jcb.201005035. Epub 2010, Dec 6. PMID:21135139 doi:10.1083/jcb.201005035
- ↑ Krishnan N, Fu C, Pappin DJ, Tonks NK. H2S-Induced sulfhydration of the phosphatase PTP1B and its role in the endoplasmic reticulum stress response. Sci Signal. 2011 Dec 13;4(203):ra86. doi: 10.1126/scisignal.2002329. PMID:22169477 doi:10.1126/scisignal.2002329
- ↑ Meyer C, Hoeger B, Temmerman K, Tatarek-Nossol M, Pogenberg V, Bernhagen J, Wilmanns M, Kapurniotu A, Kohn M. Development of Accessible Peptidic Tool Compounds To Study the Phosphatase PTP1B in Intact Cells. ACS Chem Biol. 2014 Jan 15. PMID:24387659 doi:http://dx.doi.org/10.1021/cb400903u
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