9ltj: Difference between revisions

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~~'''Unreleased structure'''~~

The ~~entry 9ltj~~ is ~~ON HOLD~~

==Cryo-EM structure of DDB1-DDA1-DET1 complex==

== Structural highlights ==

<table><tr><td colspan='2'>[[9ltj]] is a 3 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=9LTJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9LTJ FirstGlance]. <br>

</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.65Å</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=9ltj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9ltj OCA], [https://pdbe.org/9ltj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9ltj RCSB], [https://www.ebi.ac.uk/pdbsum/9ltj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9ltj ProSAT]</span></td></tr>

</table>

== Function ==

[https://www.uniprot.org/uniprot/DET1_HUMAN DET1_HUMAN] Component of the E3 ubiquitin ligase DCX DET1-COP1 complex, which is required for ubiquitination and subsequent degradation of target proteins. The complex is involved in JUN ubiquitination and degradation.<ref>PMID:14739464</ref>

== Publication Abstract from PubMed ==

Ubiquitin modifications regulate fundamental cellular activities by modulating protein stability and function. The ubiquitin ligase COP1, which is present across species from plants to humans, plays a crucial role in the ubiquitination of developmental transcription factors. While COP1 can function independently, it can also be incorporated into CULLIN4-RING ubiquitin ligase (CRL4) complexes through the DET1 adaptor protein. Despite its biological significance, the structural and functional mechanisms of COP1 and DET1-containing complexes remains poorly understood. Here we present the cryo-electron microscopy structures of human COP1 in complex with DDB1-DDA1-DET1 and Ube2e2, revealing an inactive stacked assembly state. Co-expression with COP1 substrates including c-Jun or ETS2 disrupts this configuration, inducing a conformational rearrangement into a distinct dimeric state that allows substrate access. Structural modelling identifies the spatial organization of COP1 WD40 domains where substrate recruits. DET1 serves as a structural scaffold, bridging COP1 and Ube2e2 to initiate potential ubiquitin addition on substrates, while DDB1 recruits the CULLIN4-RBX1 complex to facilitate Ube2d3-mediated ubiquitin chain elongation. These results reveal the dynamic interplay between the structural states of the CRL4(DET1-COP1) E3 ligase complex and its substrate specific activation mechanism, offering mechanistic insights into ubiquitination regulation and a basis for future studies on E3 ligase dynamics.

~~Authors~~:

Cryo-EM structure of the human COP1-DET1 ubiquitin ligase complex.,Wang S, Teng F, Stjepanovic G, Rao F, Su MY Nat Commun. 2026 Jan 15;17(1):543. doi: 10.1038/s41467-026-68375-7. PMID:41540009<ref>PMID:41540009</ref>

~~Description~~:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>

[[Category: ~~Unreleased~~ Structures]]

</div>

== References ==

__TOC__

</StructureSection>

[[Category: Homo sapiens]]

[[Category: Large Structures]]

[[Category: Su M-Y]]

[[Category: Teng F]]

[[Category: Wang S]]

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@@ Line 1: / Line 1: @@
-'''Unreleased structure'''
-The entry 9ltj is ON HOLD
+==Cryo-EM structure of DDB1-DDA1-DET1 complex==
+<StructureSection load='9ltj' size='340' side='right'caption='[[9ltj]], [[Resolution|resolution]] 2.65&Aring;' scene=''>
+== Structural highlights ==
+<table><tr><td colspan='2'>[[9ltj]] is a 3 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=9LTJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9LTJ FirstGlance]. <br>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 2.65&#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=9ltj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9ltj OCA], [https://pdbe.org/9ltj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9ltj RCSB], [https://www.ebi.ac.uk/pdbsum/9ltj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9ltj ProSAT]</span></td></tr>
+</table>
+== Function ==
+[https://www.uniprot.org/uniprot/DET1_HUMAN DET1_HUMAN] Component of the E3 ubiquitin ligase DCX DET1-COP1 complex, which is required for ubiquitination and subsequent degradation of target proteins. The complex is involved in JUN ubiquitination and degradation.<ref>PMID:14739464</ref>
+<div style="background-color:#fffaf0;">
+== Publication Abstract from PubMed ==
+Ubiquitin modifications regulate fundamental cellular activities by modulating protein stability and function. The ubiquitin ligase COP1, which is present across species from plants to humans, plays a crucial role in the ubiquitination of developmental transcription factors. While COP1 can function independently, it can also be incorporated into CULLIN4-RING ubiquitin ligase (CRL4) complexes through the DET1 adaptor protein. Despite its biological significance, the structural and functional mechanisms of COP1 and DET1-containing complexes remains poorly understood. Here we present the cryo-electron microscopy structures of human COP1 in complex with DDB1-DDA1-DET1 and Ube2e2, revealing an inactive stacked assembly state. Co-expression with COP1 substrates including c-Jun or ETS2 disrupts this configuration, inducing a conformational rearrangement into a distinct dimeric state that allows substrate access. Structural modelling identifies the spatial organization of COP1 WD40 domains where substrate recruits. DET1 serves as a structural scaffold, bridging COP1 and Ube2e2 to initiate potential ubiquitin addition on substrates, while DDB1 recruits the CULLIN4-RBX1 complex to facilitate Ube2d3-mediated ubiquitin chain elongation. These results reveal the dynamic interplay between the structural states of the CRL4(DET1-COP1) E3 ligase complex and its substrate specific activation mechanism, offering mechanistic insights into ubiquitination regulation and a basis for future studies on E3 ligase dynamics.
-Authors:
+Cryo-EM structure of the human COP1-DET1 ubiquitin ligase complex.,Wang S, Teng F, Stjepanovic G, Rao F, Su MY Nat Commun. 2026 Jan 15;17(1):543. doi: 10.1038/s41467-026-68375-7. PMID:41540009<ref>PMID:41540009</ref>
-Description:
+From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
-[[Category: Unreleased Structures]]
+</div>
+<div class="pdbe-citations 9ltj" style="background-color:#fffaf0;"></div>
+== References ==
+<references/>
+__TOC__
+</StructureSection>
+[[Category: Homo sapiens]]
+[[Category: Large Structures]]
+[[Category: Su M-Y]]
+[[Category: Teng F]]
+[[Category: Wang S]]