6b90: Difference between revisions
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The | ==Multiconformer model of apo WT PTP1B with glycerol at 100 K (ALTERNATIVE REFINEMENT OF PDB 1SUG showing conformational heterogeneity)== | ||
<StructureSection load='6b90' size='340' side='right' caption='[[6b90]], [[Resolution|resolution]] 1.95Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6b90]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6B90 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6B90 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1sug|1sug]], [[6b8e|6b8e]], [[6b8t|6b8t]], [[6b8x|6b8x]], [[6b8z|6b8z]]</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=6b90 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6b90 OCA], [http://pdbe.org/6b90 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6b90 RCSB], [http://www.ebi.ac.uk/pdbsum/6b90 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6b90 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[[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> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Protein tyrosine phosphatase 1B (PTP1B) plays a key role as a negative regulator of insulin and leptin signalling and is therefore considered to be an important molecular target for the treatment of type 2 diabetes and obesity. Detailed structural information about the structure of PTP1B, including the conformation and flexibility of active-site residues as well as the water-molecule network, is a key issue in understanding ligand binding and enzyme kinetics and in structure-based drug design. A 1.95 A apo PTP1B structure has been obtained, showing four highly coordinated water molecules in the active-site pocket of the enzyme; hence, the active site is highly solvated in the apo state. Three of the water molecules are located at positions that approximately correspond to the positions of the phosphate O atoms of the natural substrate phosphotyrosine and form a similar network of hydrogen bonds. The active-site WPD-loop was found to be in the closed conformation, in contrast to previous observations of wild-type PTPs in the apo state, in which the WPD-loop is open. The closed conformation is stabilized by a network of hydrogen bonds. These results provide new insights into and understanding of the active site of PTP1B and form a novel basis for structure-based inhibitor design. | |||
Water-molecule network and active-site flexibility of apo protein tyrosine phosphatase 1B.,Pedersen AK, Peters G GH, Moller KB, Iversen LF, Kastrup JS Acta Crystallogr D Biol Crystallogr. 2004 Sep;60(Pt 9):1527-34. Epub 2004, Aug 26. PMID:15333922<ref>PMID:15333922</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: Biel, J | <div class="pdbe-citations 6b90" style="background-color:#fffaf0;"></div> | ||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Protein-tyrosine-phosphatase]] | |||
[[Category: Biel, J T]] | |||
[[Category: Brandao-Neto, J]] | [[Category: Brandao-Neto, J]] | ||
[[Category: | [[Category: Delft, F von]] | ||
[[Category: | [[Category: Fraser, J S]] | ||
[[Category: Hill, Z | [[Category: Hill, Z B]] | ||
[[Category: Kang, E]] | [[Category: Kang, E]] | ||
[[Category: | [[Category: Keedy, D A]] | ||
[[Category: Rettenmaier, T J]] | |||
[[Category: Wells, J A]] | |||
[[Category: Allostery]] | |||
[[Category: Enzyme]] | |||
[[Category: Multiconformer]] | |||
[[Category: Multitemperature]] | |||
[[Category: Protein tyrosine phosphatase]] | |||
[[Category: Protein tyrosine phosphatase 1b]] | |||
[[Category: Ptp]] | |||
[[Category: Ptp1b]] | |||
[[Category: Signaling protein]] | |||
Revision as of 08:48, 20 June 2018
Multiconformer model of apo WT PTP1B with glycerol at 100 K (ALTERNATIVE REFINEMENT OF PDB 1SUG showing conformational heterogeneity)Multiconformer model of apo WT PTP1B with glycerol at 100 K (ALTERNATIVE REFINEMENT OF PDB 1SUG showing conformational heterogeneity)
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 PubMedProtein tyrosine phosphatase 1B (PTP1B) plays a key role as a negative regulator of insulin and leptin signalling and is therefore considered to be an important molecular target for the treatment of type 2 diabetes and obesity. Detailed structural information about the structure of PTP1B, including the conformation and flexibility of active-site residues as well as the water-molecule network, is a key issue in understanding ligand binding and enzyme kinetics and in structure-based drug design. A 1.95 A apo PTP1B structure has been obtained, showing four highly coordinated water molecules in the active-site pocket of the enzyme; hence, the active site is highly solvated in the apo state. Three of the water molecules are located at positions that approximately correspond to the positions of the phosphate O atoms of the natural substrate phosphotyrosine and form a similar network of hydrogen bonds. The active-site WPD-loop was found to be in the closed conformation, in contrast to previous observations of wild-type PTPs in the apo state, in which the WPD-loop is open. The closed conformation is stabilized by a network of hydrogen bonds. These results provide new insights into and understanding of the active site of PTP1B and form a novel basis for structure-based inhibitor design. Water-molecule network and active-site flexibility of apo protein tyrosine phosphatase 1B.,Pedersen AK, Peters G GH, Moller KB, Iversen LF, Kastrup JS Acta Crystallogr D Biol Crystallogr. 2004 Sep;60(Pt 9):1527-34. Epub 2004, Aug 26. PMID:15333922[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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