View source for 6xuq


==Human Ecto-5'-nucleotidase (CD73) in complex with A1618 (compound 1b in publication) in the closed state in crystal form IV==
<StructureSection load='6xuq' size='340' side='right'caption='[[6xuq]], [[Resolution|resolution]] 1.97&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6XUQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6XUQ 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]] 1.97&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=O1T:[[(2~{R},3~{S},4~{R},5~{R})-5-[6-chloranyl-4-[[(1~{S})-1-(4-fluorophenyl)ethyl]amino]pyrazolo[3,4-b]pyridin-1-yl]-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]methylphosphonic+acid'>O1T</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=6xuq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6xuq OCA], [https://pdbe.org/6xuq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6xuq RCSB], [https://www.ebi.ac.uk/pdbsum/6xuq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6xuq ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
CD73 is an extracellular mediator of purinergic signaling. When upregulated in the tumor microenvironment, CD73 has been implicated in the inhibition of immune function through overproduction of adenosine. Traditional efforts to inhibit CD73 have involved antibody therapy or the development of small molecules, the most potent of which mimic the acidic and ionizable structure of the enzyme's natural substrate, adenosine 5'-monophosphate (AMP). Here, we report the systematic discovery of a novel class of non-nucleotide CD73 inhibitors that are more potent than all other nonphosphonate inhibitor classes reported to date. These efforts have culminated in the discovery of 4-({5-[4-fluoro-1-(2H-indazol-6-yl)-1H-1,2,3-benzotriazol-6-yl]-1H-pyrazol-1-yl}m ethyl)benzonitrile (73, IC50 = 12 nM) and 4-({5-[4-chloro-1-(2H-indazol-6-yl)-1H-1,2,3-benzotriazol-6-yl]-1H-pyrazol-1-yl}m ethyl)benzonitrile (74, IC50 = 19 nM). Cocrystallization of 74 with human CD73 demonstrates a competitive binding mode. These compounds show promise for the improvement of drug-like character via the attenuation of the acidity and low membrane permeability inherent to known nucleoside inhibitors of CD73.

Discovery of Potent and Selective Non-Nucleotide Small Molecule Inhibitors of CD73.,Beatty JW, Lindsey EA, Thomas-Tran R, Debien L, Mandal D, Jeffrey JL, Tran AT, Fournier J, Jacob SD, Yan X, Drew SL, Ginn E, Chen A, Pham AT, Zhao S, Jin L, Young SW, Walker NP, Leleti MR, Moschutz S, Strater N, Powers JP, Lawson KV J Med Chem. 2020 Apr 8. doi: 10.1021/acs.jmedchem.9b01713. PMID:32212732<ref>PMID:32212732</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6xuq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Strater N]]