View source for 7lz8


==Tubulin-RB3_SLD-TTL in complex with compound 5t==
<StructureSection load='7lz8' size='340' side='right'caption='[[7lz8]], [[Resolution|resolution]] 2.92&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7lz8]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Gallus_gallus Gallus gallus], [https://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus] and [https://en.wikipedia.org/wiki/Sus_scrofa Sus scrofa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7LZ8 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7LZ8 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]] 2.92&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACP:PHOSPHOMETHYLPHOSPHONIC+ACID+ADENYLATE+ESTER'>ACP</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=GDP:GUANOSINE-5-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MES:2-(N-MORPHOLINO)-ETHANESULFONIC+ACID'>MES</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=YJ4:4-[2-(ethylamino)pyrido[3,2-d]pyrimidin-4-yl]-7-methoxy-3,4-dihydroquinoxalin-2(1H)-one'>YJ4</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=7lz8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7lz8 OCA], [https://pdbe.org/7lz8 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7lz8 RCSB], [https://www.ebi.ac.uk/pdbsum/7lz8 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7lz8 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TBA1B_PIG TBA1B_PIG] Tubulin is the major constituent of microtubules. It binds two moles of GTP, one at an exchangeable site on the beta chain and one at a non-exchangeable site on the alpha chain.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Small molecules that interact with the colchicine binding site in tubulin have demonstrated therapeutic efficacy in treating cancers. We report the design, syntheses, and antitumor efficacies of new analogues of pyridopyrimidine and hydroquinoxalinone compounds with improved drug-like characteristics. Eight analogues, 5j, 5k, 5l, 5m, 5n, 5r, 5t, and 5u, showed significant improvement in metabolic stability and demonstrated strong antiproliferative potency in a panel of human cancer cell lines, including melanoma, lung cancer, and breast cancer. We report crystal structures of tubulin in complex with five representative compounds, 5j, 5k, 5l, 5m, and 5t, providing direct confirmation for their binding to the colchicine site in tubulin. A quantitative structure-activity relationship analysis of the synthesized analogues showed strong ability to predict potency. In vivo, 5m (4 mg/kg) and 5t (5 mg/kg) significantly inhibited tumor growth as well as melanoma spontaneous metastasis into the lung and liver against a highly paclitaxel-resistant A375/TxR xenograft model.

X-ray Crystallography-Guided Design, Antitumor Efficacy, and QSAR Analysis of Metabolically Stable Cyclopenta-Pyrimidinyl Dihydroquinoxalinone as a Potent Tubulin Polymerization Inhibitor.,Banerjee S, Mahmud F, Deng S, Ma L, Yun MK, Fakayode SO, Arnst KE, Yang L, Chen H, Wu Z, Lukka PB, Parmar K, Meibohm B, White SW, Wang Y, Li W, Miller DD J Med Chem. 2021 Sep 9;64(17):13072-13095. doi: 10.1021/acs.jmedchem.1c01202. , Epub 2021 Aug 18. PMID:34406768<ref>PMID:34406768</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7lz8" style="background-color:#fffaf0;"></div>

==See Also==
*[[Stathmin-4 3D structures|Stathmin-4 3D structures]]
*[[Tubulin 3D Structures|Tubulin 3D Structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Gallus gallus]]
[[Category: Large Structures]]
[[Category: Rattus norvegicus]]
[[Category: Sus scrofa]]
[[Category: White SW]]
[[Category: Yun M]]