1l8g

<StructureSection load='1l8g' size='340' side='right' caption='[[1l8g]], [[Resolution|resolution]] 2.50&Aring;' scene=''>

<table><tr><td colspan='2'>[[1l8g]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1L8G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1L8G FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DBD:7-(1,1-DIOXO-1H-BENZO[D]ISOTHIAZOL-3-YLOXYMETHYL)-2-(OXALYL-AMINO)-4,7-DIHYDRO-5H-THIENO[2,3-C]PYRAN-3-CARBOXYLIC+ACID'>DBD</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1c83|1c83]]</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Protein-tyrosine-phosphatase Protein-tyrosine-phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.48 3.1.3.48] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1l8g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1l8g OCA], [http://pdbe.org/1l8g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1l8g RCSB], [http://www.ebi.ac.uk/pdbsum/1l8g PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1l8g ProSAT]</span></td></tr>

[[http://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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== Publication Abstract from PubMed ==

Utilizing structure-based design, we have previously demonstrated that it is possible to obtain selective inhibitors of protein-tyrosine phosphatase 1B (PTP1B). A basic nitrogen was introduced into a general PTP inhibitor to form a salt bridge to Asp48 in PTP1B and simultaneously cause repulsion in PTPs containing an asparagine in the equivalent position [Iversen, L. F., et al. (2000) J. Biol. Chem. 275, 10300-10307]. Further, we have recently demonstrated that Gly259 in PTP1B forms the bottom of a gateway that allows easy access to the active site for a broad range of substrates, while bulky residues in the same position in other PTPs cause steric hindrance and reduced substrate recognition capacity [Peters, G. H., et al. (2000) J. Biol. Chem. 275, 18201-18209]. The current study was undertaken to investigate the feasibility of structure-based design, utilizing these differences in accessibility to the active site among various PTPs. We show that a general, low-molecular weight PTP inhibitor can be developed into a highly selective inhibitor for PTP1B and TC-PTP by introducing a substituent, which is designed to address the region around residues 258 and 259. Detailed enzyme kinetic analysis with a set of wild-type and mutant PTPs, X-ray protein crystallography, and molecular modeling studies confirmed that selectivity for PTP1B and TC-PTP was achieved due to steric hindrance imposed by bulky position 259 residues in other PTPs.

 

<div class="pdbe-citations 1l8g" style="background-color:#fffaf0;"></div>

[[Category: Human]]

[[Category: Protein-tyrosine-phosphatase]]

[[Category: Andersen, H S]]

[[Category: Branner, S]]

[[Category: Ge, Y]]

[[Category: Hansen, T K]]

[[Category: Holsworth, D D]]

[[Category: Iversen, L F]]

[[Category: Lau, J]]

[[Category: Moller, K B]]

[[Category: Moller, N P.H]]

[[Category: Mortensen, S B]]

[[Category: Newman, M J]]

[[Category: Olsen, O H]]

[[Category: Peters, G H]]

[[Category: Protein-inhibitor]]