View source for 4buf


==Crystal structure of human tankyrase 2 in complex with 2-(4- acetylphenyl)-3,4-dihydroquinazolin-4-one==
<StructureSection load='4buf' size='340' side='right' caption='[[4buf]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4buf]] is a 2 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=4BUF OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4BUF FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=F36:2-(4-ACETYLPHENYL)-3,4-DIHYDROQUINAZOLIN-4-ONE'>F36</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4bu3|4bu3]], [[4bu5|4bu5]], [[4bu6|4bu6]], [[4bu7|4bu7]], [[4bu8|4bu8]], [[4bu9|4bu9]], [[4bua|4bua]], [[4bud|4bud]], [[4bue|4bue]], [[4bui|4bui]], [[4bus|4bus]], [[4but|4but]], [[4buu|4buu]], [[4buv|4buv]], [[4buw|4buw]], [[4bux|4bux]], [[4buy|4buy]]</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/NAD(+)_ADP-ribosyltransferase NAD(+) ADP-ribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.30 2.4.2.30] </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=4buf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4buf OCA], [http://pdbe.org/4buf PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4buf RCSB], [http://www.ebi.ac.uk/pdbsum/4buf PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4buf ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/TNKS2_HUMAN TNKS2_HUMAN]] Poly-ADP-ribosyltransferase involved in various processes such as Wnt signaling pathway, telomere length and vesicle trafficking. Acts as an activator of the Wnt signaling pathway by mediating poly-ADP-ribosylation of AXIN1 and AXIN2, 2 key components of the beta-catenin destruction complex: poly-ADP-ribosylated target proteins are recognized by RNF146, which mediates their ubiquitination and subsequent degradation. Also mediates poly-ADP-ribosylation of BLZF1 and CASC3, followed by recruitment of RNF146 and subsequent ubiquitination. Mediates poly-ADP-ribosylation of TERF1, thereby contributing to the regulation of telomere length. May also regulate vesicle trafficking and modulate the subcellular distribution of SLC2A4/GLUT4-vesicles.<ref>PMID:11802774</ref> <ref>PMID:11739745</ref> <ref>PMID:19759537</ref> <ref>PMID:21478859</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Human tankyrases are attractive drug targets, especially for the treatment of cancer. We identified a set of highly potent tankyrase inhibitors based on a 2-phenyl-3,4-dihydroquinazolin-4-one scaffold. Substitutions at the para position of the scaffold's phenyl group were evaluated as a strategy to increase potency and improve selectivity. The best compounds displayed single-digit nanomolar potencies, and profiling against several human diphtheria-toxin-like ADP-ribosyltransferases revealed that a subset of these compounds are highly selective tankyrase inhibitors. The compounds also effectively inhibit Wnt signaling in HEK293 cells. The binding mode of all inhibitors was studied by protein X-ray crystallography. This allowed us to establish a structural basis for the development of highly potent and selective tankyrase inhibitors based on the 2-phenyl-3,4-dihydroquinazolin-4-one scaffold and outline a rational approach to the modification of other inhibitor scaffolds that bind to the nicotinamide site of the catalytic domain.

para-Substituted 2-Phenyl-3,4-dihydroquinazolin-4-ones As Potent and Selective Tankyrase Inhibitors.,Haikarainen T, Koivunen J, Narwal M, Venkannagari H, Obaji E, Joensuu P, Pihlajaniemi T, Lehtio L ChemMedChem. 2013 Oct 15. doi: 10.1002/cmdc.201300337. PMID:24130191<ref>PMID:24130191</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4buf" style="background-color:#fffaf0;"></div>

==See Also==
*[[Poly (ADP-ribose) polymerase|Poly (ADP-ribose) polymerase]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Haikarainen, T]]
[[Category: Lehtio, L]]
[[Category: Narwal, M]]
[[Category: Adp- ribosylation]]
[[Category: Diphtheria toxin like fold]]
[[Category: Protein-ligand complex]]
[[Category: Transferase]]
[[Category: Transferase-transferase inhibitor complex]]