View source for 2yq0


==KSHV LANA (ORF73) C-terminal domain, octameric ring: cubic crystal form==
<StructureSection load='2yq0' size='340' side='right'caption='[[2yq0]], [[Resolution|resolution]] 3.91&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2yq0]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human_herpesvirus_8_type_M Human herpesvirus 8 type M]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2YQ0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2YQ0 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]] 3.911&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2yq0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2yq0 OCA], [https://pdbe.org/2yq0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2yq0 RCSB], [https://www.ebi.ac.uk/pdbsum/2yq0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2yq0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q76SB0_HHV8 Q76SB0_HHV8] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Kaposi sarcoma-associated herpesvirus (KSHV) establishes a lifelong latent infection and causes several malignancies in humans. Murine herpesvirus 68 (MHV-68) is a related gamma2-herpesvirus frequently used as a model to study the biology of gamma-herpesviruses in vivo. The KSHV latency-associated nuclear antigen (kLANA) and the MHV68 mLANA (orf73) protein are required for latent viral replication and persistence. Latent episomal KSHV genomes and kLANA form nuclear microdomains, termed 'LANA speckles', which also contain cellular chromatin proteins, including BRD2 and BRD4, members of the BRD/BET family of chromatin modulators. We solved the X-ray crystal structure of the C-terminal DNA binding domains (CTD) of kLANA and MHV-68 mLANA. While these structures share the overall fold with the EBNA1 protein of Epstein-Barr virus, they differ substantially in their surface characteristics. Opposite to the DNA binding site, both kLANA and mLANA CTD contain a characteristic lysine-rich positively charged surface patch, which appears to be a unique feature of gamma2-herpesviral LANA proteins. Importantly, kLANA and mLANA CTD dimers undergo higher order oligomerization. Using NMR spectroscopy we identified a specific binding site for the ET domains of BRD2/4 on kLANA. Functional studies employing multiple kLANA mutants indicate that the oligomerization of native kLANA CTD dimers, the characteristic basic patch and the ET binding site on the kLANA surface are required for the formation of kLANA 'nuclear speckles' and latent replication. Similarly, the basic patch on mLANA contributes to the establishment of MHV-68 latency in spleen cells in vivo. In summary, our data provide a structural basis for the formation of higher order LANA oligomers, which is required for nuclear speckle formation, latent replication and viral persistence.

A Structural Basis for BRD2/4-Mediated Host Chromatin Interaction and Oligomer Assembly of Kaposi Sarcoma-Associated Herpesvirus and Murine Gammaherpesvirus LANA Proteins.,Hellert J, Weidner-Glunde M, Krausze J, Richter U, Adler H, Fedorov R, Pietrek M, Ruckert J, Ritter C, Schulz TF, Luhrs T PLoS Pathog. 2013 Oct;9(10):e1003640. doi: 10.1371/journal.ppat.1003640. Epub, 2013 Oct 17. PMID:24146614<ref>PMID:24146614</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 2yq0" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Human herpesvirus 8 type M]]
[[Category: Large Structures]]
[[Category: Hellert J]]
[[Category: Krausze J]]
[[Category: Luhrs T]]