3mz4

<StructureSection load='3mz4' size='340' side='right' caption='[[3mz4]], [[Resolution|resolution]] 1.84&Aring;' scene=''>

<table><tr><td colspan='2'>[[3mz4]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3MZ4 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3MZ4 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=B3N:4-(DIMETHYLAMINO)-N-[7-(HYDROXYAMINO)-7-OXOHEPTYL]BENZAMIDE'>B3N</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Histone_deacetylase Histone deacetylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.1.98 3.5.1.98] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3mz4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3mz4 OCA], [http://pdbe.org/3mz4 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3mz4 RCSB], [http://www.ebi.ac.uk/pdbsum/3mz4 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3mz4 ProSAT]</span></td></tr>

[[http://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>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/mz/3mz4_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

The metal-dependent histone deacetylases (HDACs) adopt an alpha/beta protein fold first identified in rat liver arginase. Despite insignificant overall amino acid sequence identity, these enzymes share a strictly conserved metal binding site with divergent metal specificity and stoichiometry. HDAC8, originally thought to be a Zn(2+)-metallohydrolase, exhibits increased activity with Co(2+) and Fe(2+) cofactors based on k(cat)/K(M) (Gantt, S. L., Gattis, S. G., and Fierke, C. A. (2006) Biochemistry 45, 6170-6178). Here, we report the first X-ray crystal structures of metallo-substituted HDAC8, Co(2+)-HDAC8, D101L Co(2+)-HDAC8, D101L Mn(2+)-HDAC8, and D101L Fe(2+)-HDAC8, each complexed with the inhibitor M344. Metal content of protein samples in solution is confirmed by inductively coupled plasma mass spectrometry. For the crystalline enzymes, peaks in Bijvoet difference Fourier maps calculated from X-ray diffraction data collected near the respective elemental absorption edges confirm metal substitution. Additional solution studies confirm incorporation of Cu(2+); Fe(3+) and Ni(2+) do not bind under conditions tested. The metal dependence of the substrate K(M) values and the K(i) values of hydroxamate inhibitors that chelate the active site metal are consistent with substrate-metal coordination in the precatalytic Michaelis complex that enhances catalysis. Additionally, although HDAC8 binds Zn(2+) nearly 10(6)-fold more tightly than Fe(2+), the affinities for both metal ions are comparable to the readily exchangeable metal concentrations estimated in living cells, suggesting that HDAC8 could bind either or both Fe(2+) or Zn(2+) in vivo.

Structures of metal-substituted human histone deacetylase 8 provide mechanistic inferences on biological function .,Dowling DP, Gattis SG, Fierke CA, Christianson DW Biochemistry. 2010 Jun 22;49(24):5048-56. PMID:20545365<ref>PMID:20545365</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 3mz4" style="background-color:#fffaf0;"></div>

*[[Histone deacetylase|Histone deacetylase]]

[[Category: Histone deacetylase]]

[[Category: Human]]

[[Category: Christianson, D W]]

[[Category: Dowling, D P]]

[[Category: Fierke, C A]]

[[Category: Gattis, S G]]

[[Category: Metallohydrolase]]