View source for 6do3


==KLHDC2 ubiquitin ligase in complex with SelK C-end degron==
<StructureSection load='6do3' size='340' side='right'caption='[[6do3]], [[Resolution|resolution]] 2.17&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6do3]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DO3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6DO3 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]] 2.165&#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=6do3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6do3 OCA], [https://pdbe.org/6do3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6do3 RCSB], [https://www.ebi.ac.uk/pdbsum/6do3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6do3 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/KLDC2_HUMAN KLDC2_HUMAN] Represses CREB3-mediated transcription by interfering with CREB3-DNA binding.<ref>PMID:11384994</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Aberrant proteins can be deleterious to cells and are cleared by the ubiquitin-proteasome system. A group of C-end degrons that are recognized by specific cullin-RING ubiquitin E3 ligases (CRLs) has recently been identified in some of these abnormal polypeptides. Here, we report three crystal structures of a CRL2 substrate receptor, KLHDC2, in complex with the diglycine-ending C-end degrons of two early-terminated selenoproteins and the N-terminal proteolytic fragment of USP1. The E3 recognizes the degron peptides in a similarly coiled conformation and cradles their C-terminal diglycine with a deep surface pocket. By hydrogen bonding with multiple backbone carbonyls of the peptides, KLHDC2 further locks in the otherwise degenerate degrons with a compact interface and unexpected high affinities. Our results reveal the structural mechanism by which KLHDC2 recognizes the simplest C-end degron and suggest a functional necessity of the E3 to tightly maintain the low abundance of its select substrates.

Recognition of the Diglycine C-End Degron by CRL2(KLHDC2) Ubiquitin Ligase.,Rusnac DV, Lin HC, Canzani D, Tien KX, Hinds TR, Tsue AF, Bush MF, Yen HS, Zheng N Mol Cell. 2018 Dec 6;72(5):813-822.e4. doi: 10.1016/j.molcel.2018.10.021. PMID:30526872<ref>PMID:30526872</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6do3" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Lin HC]]
[[Category: Rusnac DV]]
[[Category: Yen HCS]]
[[Category: Zheng N]]