View source for 7vrr


==Crystal structure of Arabidopsis thaliana HDT1==
<StructureSection load='7vrr' size='340' side='right'caption='[[7vrr]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7vrr]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7VRR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7VRR 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]] 2.95&#8491;</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=7vrr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7vrr OCA], [https://pdbe.org/7vrr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7vrr RCSB], [https://www.ebi.ac.uk/pdbsum/7vrr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7vrr ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/HDT1_ARATH HDT1_ARATH] Probably mediates 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. Required for histone H3 'Lys-9' deacetylation. Involved in rRNA gene silencing in nucleolar dominance. Seems to be implicated in the regulation of genes involved in seeds development.<ref>PMID:10792817</ref> <ref>PMID:12694598</ref> <ref>PMID:14992728</ref> <ref>PMID:15144374</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Histone acetyltransferase (HAT)- and histone deacetylase (HDAC)-mediated histone acetylation and deacetylation regulate nucleosome dynamics and gene expression. HDACs are classified into different families, with HD-tuins or HDTs being specific to plants. HDTs show some sequence similarity to nucleoplasmins, the histone chaperones that aid in binding, storing, and loading H2A/H2B dimers to assemble nucleosomes. Here, we solved the crystal structure of the N-terminal domain (NTD) of all four HDTs (HDT1, HDT2, HDT3, and HDT4) from Arabidopsis (Arabidopsis thaliana). The NTDs form a nucleoplasmin fold, exist as pentamers in solution, and are resistant to protease treatment, high temperature, salt, and urea conditions. Structurally, HDTs do not form a decamer, unlike certain classical nucleoplasmins. The HDT NTD requires an additional A2 acidic tract C-terminal to the nucleoplasmin domain for interaction with histone H3/H4 and H2A/H2B oligomers. We also report the in-solution structures of HDT2 pentamers in complex with histone oligomers. Our study provides a detailed structural and in vitro functional characterization of HDTs, revealing them to be nucleoplasmin family histone chaperones. The experimental confirmation that HDTs are nucleoplasmins may spark new interest in this enigmatic family of proteins.

Plant-specific HDT family histone deacetylases are nucleoplasmins.,Bobde RC, Kumar A, Vasudevan D Plant Cell. 2022 Sep 7. pii: 6693634. doi: 10.1093/plcell/koac275. PMID:36069647<ref>PMID:36069647</ref>

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

==See Also==
*[[Histone deacetylase 3D structures|Histone deacetylase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arabidopsis thaliana]]
[[Category: Large Structures]]
[[Category: Bobde RC]]
[[Category: Kumar A]]
[[Category: Vasudevan D]]