View source for 8cza


==Crystal structure of the first bromodomain (BD1) of human BRDT bound to GXH-IV-075==
<StructureSection load='8cza' size='340' side='right'caption='[[8cza]], [[Resolution|resolution]] 2.96&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8cza]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8CZA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8CZA 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]] 2.96&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=ZN1:4-[(4-{4-chloro-3-[(2-methylpropane-2-sulfonyl)amino]anilino}-5-methylpyrimidin-2-yl)amino]-2-fluoro-N-[1-(14-{3-[(2-{3-fluoro-4-[(piperidin-4-yl)carbamoyl]anilino}-5-methylpyrimidin-4-yl)amino]-5-[(2-methylpropane-2-sulfonyl)amino]phenyl}-14-oxo-4,7,10-trioxa-13-azatetradecanan-1-oyl)piperidin-4-yl]benzamide'>ZN1</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=8cza FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8cza OCA], [https://pdbe.org/8cza PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8cza RCSB], [https://www.ebi.ac.uk/pdbsum/8cza PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8cza ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/BRDT_HUMAN BRDT_HUMAN] Testis-specific chromatin protein that specifically binds histone H4 acetylated at 'Lys-5' and 'Lys-8' (H4K5ac and H4K8ac, respectively) and plays a key role in spermatogenesis. Required in late pachytene spermatocytes: plays a role in meiotic and post-meiotic cells by binding to acetylated histones at the promoter of specific meiotic and post-meiotic genes, facilitating their activation at the appropriate time. In the post-meiotic phase of spermatogenesis, binds to hyperacetylated histones and participates in their general removal from DNA. Also acts as a component of the splicing machinery in pachytene spermatocytes and round spermatids and participates in 3'-UTR truncation of specific mRNAs in post-meiotic spermatids. Required for chromocenter organization, a structure comprised of peri-centromeric heterochromatin.<ref>PMID:9367677</ref> <ref>PMID:15647849</ref> <ref>PMID:22901802</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bromodomain and extraterminal domain (BET) proteins are important regulators of gene transcription and chromatin remodeling. BET family members BRD4 and BRDT are validated targets for cancer and male contraceptive drug development, respectively. Due to the high structural similarity of the acetyl-lysine binding sites, most reported inhibitors lack intra-BET selectivity. We surmised that protein-protein interactions induced by bivalent inhibitors may differ between BRD4 and BRDT, conferring an altered selectivity profile. Starting from nonselective monovalent inhibitors, we developed cell-active bivalent BET inhibitors with increased activity and selectivity for BRDT. X-ray crystallographic and solution studies revealed unique structural states of BRDT and BRD4 upon interaction with bivalent inhibitors. Varying spacer lengths and symmetric vs unsymmetric connections resulted in the same dimeric states, whereas different chemotypes induced different dimers. The findings indicate that the increased intra-BET selectivity of bivalent inhibitors is due to the differential plasticity of BET bromodomains upon inhibitor-induced dimerization.

Bivalent BET Bromodomain Inhibitors Confer Increased Potency and Selectivity for BRDT via Protein Conformational Plasticity.,Guan X, Cheryala N, Karim RM, Chan A, Berndt N, Qi J, Georg GI, Schonbrunn E J Med Chem. 2022 Jul 22. doi: 10.1021/acs.jmedchem.2c00453. PMID:35867655<ref>PMID:35867655</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8cza" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Chan A]]
[[Category: Schonbrunn E]]