View source for 5xhe


==Crystal structure analysis of the second bromodomain of BRD2 covalently linked to b-mercaptoethanol==
<StructureSection load='5xhe' size='340' side='right'caption='[[5xhe]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5xhe]] is a 1 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=5XHE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5XHE 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]] 1.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CME:S,S-(2-HYDROXYETHYL)THIOCYSTEINE'>CME</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PGE:TRIETHYLENE+GLYCOL'>PGE</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=5xhe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5xhe OCA], [https://pdbe.org/5xhe PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5xhe RCSB], [https://www.ebi.ac.uk/pdbsum/5xhe PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5xhe ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/BRD2_HUMAN BRD2_HUMAN] May play a role in spermatogenesis or folliculogenesis (By similarity). Binds hyperacetylated chromatin and plays a role in the regulation of transcription, probably by chromatin remodeling. Regulates transcription of the CCND1 gene. Plays a role in nucleosome assembly.<ref>PMID:18406326</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Bromodomain and extra-terminal family proteins recognize the acetylated histone code on chromatin and participate in downstream processes like DNA replication, modification, and repair. As part of epigenetic approaches, BRD2 and BRD4 were identified as putative targets, for the management of chronic diseases. We have recently reported the discovery of a new scaffold of the phenanthridinone-based inhibitor (L10) of the second bromodomain of BRD2 (BRD2-BD2). Here, we present the crystal structure of the BRD2-BD2, refined to 1.4 A resolution, in complex with beta-mercaptoethanol (a component of the protein buffer). The beta-mercaptoethanol covalently links to C425 of BD2 in the acetyl-lysine binding pocket, to form a modified cysteine mercaptoethanol (CME). The CME modification significantly hinders the entry of ligands into the BD2 binding pocket, suggesting that beta-mercaptoethanol should be removed during protein production process. Next, to confirm whether phenanthridionone scaffold is a new inhibitor family of BRD2-BD2, we have determined the crystal structure of BD2 in complex with 6(5H)-Phenanthridinone (a core moiety of L10), refined to 1.28 A resolution. It confirmed that the phenanthridinone molecule, unambiguously, binds to BD2. Moreover, we performed molecular docking and molecular dynamic studies on selected phenanthridinone analogs. The predicted L10 analogs are stable with essential hydrophobic and hydrophilic interactions with BD2 during molecular dynamic simulations. We propose that the predicted phenanthridinone analogs may be potential molecules for inhibiting the BD2 function of acetylated histone recognition.

Insights into the crystal structure of BRD2-BD2 - phenanthridinone complex and theoretical studies on phenanthridinone analogs.,Mathur S, Deshmukh P, Tripathi S, Marimuthu P, Padmanabhan B J Biomol Struct Dyn. 2017 Jul 31:1-19. doi: 10.1080/07391102.2017.1353441. PMID:28696179<ref>PMID:28696179</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5xhe" style="background-color:#fffaf0;"></div>

==See Also==
*[[Bromodomain-containing protein 3D structures|Bromodomain-containing protein 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Deshmukh P]]
[[Category: Mathur S]]
[[Category: Padmanabhan B]]
[[Category: Tripathi SK]]