8cdj: Difference between revisions
No edit summary |
No edit summary |
||
| Line 4: | Line 4: | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[8cdj]] is a 5 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=8CDJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8CDJ FirstGlance]. <br> | <table><tr><td colspan='2'>[[8cdj]] is a 5 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=8CDJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8CDJ FirstGlance]. <br> | ||
</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=8cdj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8cdj OCA], [https://pdbe.org/8cdj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8cdj RCSB], [https://www.ebi.ac.uk/pdbsum/8cdj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8cdj ProSAT]</span></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 3.4Å</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=8cdj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8cdj OCA], [https://pdbe.org/8cdj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8cdj RCSB], [https://www.ebi.ac.uk/pdbsum/8cdj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8cdj ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | == Function == | ||
| Line 12: | Line 13: | ||
Cells respond to environmental cues by remodeling their inventories of multiprotein complexes. Cellular repertoires of SCF (SKP1-CUL1-F box protein) ubiquitin ligase complexes, which mediate much protein degradation, require CAND1 to distribute the limiting CUL1 subunit across the family of approximately 70 different F box proteins. Yet, how a single factor coordinately assembles numerous distinct multiprotein complexes remains unknown. We obtained cryo-EM structures of CAND1-bound SCF complexes in multiple states and correlated mutational effects on structures, biochemistry, and cellular assays. The data suggest that CAND1 clasps idling catalytic domains of an inactive SCF, rolls around, and allosterically rocks and destabilizes the SCF. New SCF production proceeds in reverse, through SKP1-F box allosterically destabilizing CAND1. The CAND1-SCF conformational ensemble recycles CUL1 from inactive complexes, fueling mixing and matching of SCF parts for E3 activation in response to substrate availability. Our data reveal biogenesis of a predominant family of E3 ligases, and the molecular basis for systemwide multiprotein complex assembly. | Cells respond to environmental cues by remodeling their inventories of multiprotein complexes. Cellular repertoires of SCF (SKP1-CUL1-F box protein) ubiquitin ligase complexes, which mediate much protein degradation, require CAND1 to distribute the limiting CUL1 subunit across the family of approximately 70 different F box proteins. Yet, how a single factor coordinately assembles numerous distinct multiprotein complexes remains unknown. We obtained cryo-EM structures of CAND1-bound SCF complexes in multiple states and correlated mutational effects on structures, biochemistry, and cellular assays. The data suggest that CAND1 clasps idling catalytic domains of an inactive SCF, rolls around, and allosterically rocks and destabilizes the SCF. New SCF production proceeds in reverse, through SKP1-F box allosterically destabilizing CAND1. The CAND1-SCF conformational ensemble recycles CUL1 from inactive complexes, fueling mixing and matching of SCF parts for E3 activation in response to substrate availability. Our data reveal biogenesis of a predominant family of E3 ligases, and the molecular basis for systemwide multiprotein complex assembly. | ||
Systemwide disassembly and assembly of SCF ubiquitin ligase complexes.,Baek K, Scott DC, Henneberg LT, King MT, Mann M, Schulman BA Cell. 2023 | Systemwide disassembly and assembly of SCF ubiquitin ligase complexes.,Baek K, Scott DC, Henneberg LT, King MT, Mann M, Schulman BA Cell. 2023 Apr 27;186(9):1895-1911.e21. doi: 10.1016/j.cell.2023.02.035. Epub , 2023 Apr 6. PMID:37028429<ref>PMID:37028429</ref> | ||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 8cdj" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 8cdj" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[CAND1 3D structures|CAND1 3D structures]] | |||
*[[Ubiquitin protein ligase 3D structures|Ubiquitin protein ligase 3D structures]] | |||
== References == | == References == | ||
<references/> | <references/> | ||