View source for 3q35


==Structure of the Rtt109-AcCoA/Vps75 complex and implications for chaperone-mediated histone acetylation==
<StructureSection load='3q35' size='340' side='right'caption='[[3q35]], [[Resolution|resolution]] 3.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3q35]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3Q35 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3Q35 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]] 3.3&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACO:ACETYL+COENZYME+*A'>ACO</scene>, <scene name='pdbligand=ALY:N(6)-ACETYLLYSINE'>ALY</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</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=3q35 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3q35 OCA], [https://pdbe.org/3q35 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3q35 RCSB], [https://www.ebi.ac.uk/pdbsum/3q35 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3q35 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/RT109_YEAST RT109_YEAST] Required for acetylation of 'Lys-56' of histone H3 (H3K56ac) which occurs in S phase and disappears during G(2)/M phase of the cell cycle and is involved in transcription DNA repair process. H3K56 acetylation weakens of the interaction between the histone core and the surrounding DNA in the nucleosomal particle and drives chromatin disassembly. Involved in regulation of Ty1 transposition.<ref>PMID:11779788</ref> <ref>PMID:17046836</ref> <ref>PMID:17369253</ref> <ref>PMID:17690098</ref> <ref>PMID:17320445</ref> <ref>PMID:17272722</ref> <ref>PMID:17272723</ref> <ref>PMID:18577595</ref> <ref>PMID:18723682</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Yeast Rtt109 promotes nucleosome assembly and genome stability by acetylating K9, K27, and K56 of histone H3 through interaction with either of two distinct histone chaperones, Vps75 or Asf1. We report the crystal structure of an Rtt109-AcCoA/Vps75 complex revealing an elongated Vps75 homodimer bound to two globular Rtt109 molecules to form a symmetrical holoenzyme with a approximately 12 A diameter central hole. Vps75 and Rtt109 residues that mediate complex formation in the crystals are also important for Rtt109-Vps75 interaction and H3K9/K27 acetylation both in vitro and in yeast cells. The same Rtt109 residues do not participate in Asf1-mediated Rtt109 acetylation in vitro or H3K56 acetylation in yeast cells, demonstrating that Asf1 and Vps75 dictate Rtt109 substrate specificity through distinct mechanisms. These studies also suggest that Vps75 binding stimulates Rtt109 catalytic activity by appropriately presenting the H3-H4 substrate within the central cavity of the holoenzyme to promote H3K9/K27 acetylation of new histones before deposition.

Structure of the Rtt109-AcCoA/Vps75 Complex and Implications for Chaperone-Mediated Histone Acetylation.,Tang Y, Holbert MA, Delgoshaie N, Wurtele H, Guillemette B, Meeth K, Yuan H, Drogaris P, Lee EH, Durette C, Thibault P, Verreault A, Cole PA, Marmorstein R Structure. 2011 Feb 9;19(2):221-31. Epub 2011 Jan 20. PMID:21256037<ref>PMID:21256037</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3q35" style="background-color:#fffaf0;"></div>

==See Also==
*[[Histone acetyltransferase 3D structures|Histone acetyltransferase 3D structures]]
*[[Vacuolar protein sorting-associated protein 3D structures|Vacuolar protein sorting-associated protein 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Marmorstein R]]
[[Category: Meeth K]]
[[Category: Tang Y]]
[[Category: Yuan H]]