View source for 5tte


==Crystal Structure of an RBR E3 ubiquitin ligase in complex with an E2-Ub thioester intermediate mimic==
<StructureSection load='5tte' size='340' side='right'caption='[[5tte]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5tte]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Triticum_aestivum Triticum aestivum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5TTE OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5TTE 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]] 3.501&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</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=5tte FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5tte OCA], [https://pdbe.org/5tte PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5tte RCSB], [https://www.ebi.ac.uk/pdbsum/5tte PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5tte ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ARI1_HUMAN ARI1_HUMAN] E3 ubiquitin-protein ligase, which catalyzes polyubiquitination of target proteins together with ubiquitin-conjugating enzyme E2 UBE2L3. May play a role in protein translation by mediating polyubiquitination of EIF4E2, leading to its subsequent degradation.<ref>PMID:14623119</ref> <ref>PMID:21532592</ref> <ref>PMID:15236971</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
RING-in-between-RING (RBR) ubiquitin (Ub) E3 ligases function with Ub E2s through a RING/HECT hybrid mechanism to conjugate Ub to target proteins. Here, we report the crystal structure of the RBR E3, HHARI, in complex with a UbcH7 ~ Ub thioester mimetic which reveals the molecular basis for the specificity of this cognate E2/RBR E3 pair. The structure also reveals mechanistically important conformational changes in the RING1 and UBA-like domains of HHARI that accompany UbcH7 ~ Ub binding and provides a molecular basis by which HHARI recruits E2 ~ Ub in an 'open' conformation. In addition to optimally functioning with an E2 that solely performs transthiolation, our data suggests that HHARI prevents spurious discharge of Ub from E2 to lysine residues by: (1) harboring structural elements that block E2 ~ Ub from adopting a 'closed' conformation and (2) participating in contacts to ubiquitin that promote an open E2 ~ Ub conformation.HHARI is a RING-in-between-RING (RBR) ubiquitin (Ub) E3 ligase. Here the authors present the crystal structure of HHARI with the UbcH7 ~ Ub thioester intermediate mimetic, which reveals that HHARI binds this E2 ~ Ub in an open conformation and explains the specificity of this cognate RBR E3/E2 pair.

Structural insights into the mechanism and E2 specificity of the RBR E3 ubiquitin ligase HHARI.,Yuan L, Lv Z, Atkison JH, Olsen SK Nat Commun. 2017 Aug 8;8(1):211. doi: 10.1038/s41467-017-00272-6. PMID:28790309<ref>PMID:28790309</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5tte" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ubiquitin protein ligase 3D structures|Ubiquitin protein ligase 3D structures]]
*[[3D structures of ubiquitin|3D structures of ubiquitin]]
*[[3D structures of ubiquitin conjugating enzyme|3D structures of ubiquitin conjugating enzyme]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Triticum aestivum]]
[[Category: Lv Z]]
[[Category: Olsen SK]]
[[Category: Yuan L]]