View source for 5zb5


==The structural basis of histone chaperoneVps75==
<StructureSection load='5zb5' size='340' side='right'caption='[[5zb5]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5zb5]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Pneumocystis_carinii Pneumocystis carinii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5ZB5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5ZB5 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]] 2.299&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</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=5zb5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5zb5 OCA], [https://pdbe.org/5zb5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5zb5 RCSB], [https://www.ebi.ac.uk/pdbsum/5zb5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5zb5 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/M1JYC8_PNECA M1JYC8_PNECA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Rtt109 is a histone acetyltransferase (HAT) that is a potential therapeutic target in conditioned pathogenic fungi Pneumocystis carinii (P. carinii). The histone chaperone Vps75 can stimulate the Rtt109-dependent acetylation of several histone H3 lysines and preferentially acetylates H3K9 and H3K27 within canonical histone (H3-H4)2 tetramers. Vps75 shows two protein conformations assembled into dimeric and tetrameric forms, but the roles played by multimeric forms of Vps75 in Rtt109-mediated histone acetylation remain elusive. In P. carinii, we identified that Vps75 (PcVps75) dimers regulate H3K9 and H3K27 acetylation by directly interacting with histone (H3-H4)2 tetramers, rather than by forming a Vps75-Rtt109 complex. For PcVps75 tetramers, the major histone-binding surface is buried within a walnut-like structure in the absence of a histone cargo. Based on crystal structures of dimeric and tetrameric forms of PcVps75, as well as HAT assay data, we confirmed that residues 192E, 193D, 194E, 195E, and 196E and the disordered C-terminal tail (residues 224-250) of PcVps75 mediate interactions with histones and are important for the Rtt109 in P. carinii (PcRtt109)-mediated acetylation of H3K9 and H3K27, both in vitro and in yeast cells. Furthermore, expressing PcRtt109 alone or in combination with PcVps75 variants that cannot effectively bind histones could not fully restore cellular growth in the presence of genotoxic agents that block DNA replication owing to the absence of H3K9 and H3K27 acetylation. Together, these data indicate that the interaction between PcVps75 and histone (H3-H4)2 tetramers is a critical regulator of the Rtt109-mediated acetylation of H3K9 and H3K27.

Structural basis for the acetylation of histone H3K9 and H3K27 mediated by the histone chaperone Vps75 in Pneumocystis carinii.,Chen Y, Zhang Y, Ye H, Dou Y, Lu D, Li X, Limper AH, Han J, Su D Signal Transduct Target Ther. 2019 May 10;4:14. doi: 10.1038/s41392-019-0047-8., eCollection 2019. PMID:31098304<ref>PMID:31098304</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5zb5" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pneumocystis carinii]]
[[Category: Chen Y]]
[[Category: Dou Y]]
[[Category: Jiang H]]
[[Category: Limper A]]
[[Category: Su D]]
[[Category: Wang M]]
[[Category: Xu S]]
[[Category: Zhang Y]]