3rqd: Difference between revisions

<table><tr><td colspan='2'>[[3rqd]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Symploca Symploca]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3RQD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3RQD 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]] 2.143&#8491;</td></tr>

<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=02G:(3S,4E)-3-HYDROXY-7-SULFANYLHEPT-4-ENOIC+ACID'>02G</scene>, <scene name='pdbligand=03Y:2-METHYL-L-CYSTEINE'>03Y</scene>, <scene name='pdbligand=BB9:(2Z)-2-AMINO-3-SULFANYLPROP-2-ENOIC+ACID'>BB9</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</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=3rqd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3rqd OCA], [https://pdbe.org/3rqd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3rqd RCSB], [https://www.ebi.ac.uk/pdbsum/3rqd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3rqd ProSAT]</span></td></tr>

[https://www.uniprot.org/uniprot/HDAC8_HUMAN HDAC8_HUMAN] Responsible for the deacetylation of lysine residues on the N-terminal part of the core histones (H2A, H2B, H3 and H4). Histone deacetylation gives a tag for epigenetic repression and plays an important role in transcriptional regulation, cell cycle progression and developmental events. Histone deacetylases act via the formation of large multiprotein complexes. May play a role in smooth muscle cell contractility.<ref>PMID:10748112</ref> <ref>PMID:10926844</ref> <ref>PMID:10922473</ref> <ref>PMID:14701748</ref>

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Largazole is a macrocyclic depsipeptide originally isolated from the marine cyanobacterium Symploca sp., which is indigenous to the warm, blue-green waters of Key Largo, Florida (whence largazole derives its name). Largazole contains an unusual thiazoline-thiazole ring system that rigidifies its macrocyclic skeleton, and it also contains a lipophilic thioester side chain. Hydrolysis of the thioester in vivo yields largazole thiol, which exhibits remarkable antiproliferative effects and is believed to be the most potent inhibitor of the metal-dependent histone deacetylases (HDACs). Here, the 2.14 A-resolution crystal structure of the HDAC8-largazole thiol complex is the first of an HDAC complexed with a macrocyclic inhibitor and reveals that ideal thiolate-zinc coordination geometry is the key chemical feature responsible for its exceptional affinity and biological activity. Notably, the core structure of largazole is conserved in romidepsin, a depsipeptide natural product formulated as the drug Istodax recently approved for cancer chemotherapy. Accordingly, the structure of the HDAC8-largazole thiol complex is the first to illustrate the mode of action of a new class of therapeutically important HDAC inhibitors.

Structural basis of the antiproliferative activity of largazole, a depsipeptide inhibitor of the histone deacetylases.,Cole KE, Dowling DP, Boone MA, Phillips AJ, Christianson DW J Am Chem Soc. 2011 Aug 17;133(32):12474-7. Epub 2011 Jul 26. PMID:21790156<ref>PMID:21790156</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 3rqd" style="background-color:#fffaf0;"></div>

*[[Histone deacetylase 3D structures|Histone deacetylase 3D structures]]

== References ==

<references/>

</StructureSection>

[[Category: Large Structures]]

[[Category: Symploca]]

[[Category: Christianson DW]]

[[Category: Cole KE]]

[[Category: Dowling DP]]