8ub4: Difference between revisions
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==Cdc48-Shp1 unfolding native substrate, consensus structure== | |||
<StructureSection load='8ub4' size='340' side='right'caption='[[8ub4]], [[Resolution|resolution]] 2.90Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[8ub4]] is a 10 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8UB4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8UB4 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]] 2.9Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=08T:[[[(2R,3S,4R,5R)-5-(6-AMINOPURIN-9-YL)-3,4-BIS(OXIDANYL)OXOLAN-2-YL]METHOXY-OXIDANYL-PHOSPHORYL]OXY-OXIDANYL-PHOSPHORYL]OXY-TRIS(FLUORANYL)BERYLLIUM'>08T</scene>, <scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=8ub4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ub4 OCA], [https://pdbe.org/8ub4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ub4 RCSB], [https://www.ebi.ac.uk/pdbsum/8ub4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ub4 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/CDC48_YEAST CDC48_YEAST] ATP-dependent chaperone which probably uses the energy provided by ATP hydrolysis to generate mechanical force to unfold substrate proteins, disassemble protein complexes, and disaggregate protein aggregates (PubMed:21454554). By recruiting and promoting the degradation of ubiquitinated proteins, plays a role in the ubiquitin fusion degradation (UFD) pathway (PubMed:16428438). Has a role in the endoplasmic reticulum-associated degradation (ERAD) pathway which mediates the cytoplasmic elimination of misfolded proteins exported from the ER (PubMed:11813000, PubMed:11740563, PubMed:11847109, PubMed:21148305). Required for the proteasome-dependent processing/activation of MGA2 and SPT23 transcription factors leading to the subsequent expression of OLE1 (PubMed:11847109, PubMed:11733065). Has an additional role in the turnover of OLE1 where it targets ubiquitinated OLE1 and other proteins to the ERAD (PubMed:11847109). Regulates ubiquitin-mediated mitochondria protein degradation (PubMed:21070972, PubMed:27044889). Involved in spindle disassembly probably by promoting the degradation of spindle assembly factors ASE1 and CDC5 at the end of mitosis (PubMed:14636562). Component of the ribosome quality control complex (RQC), a ribosome-associated complex that mediates ubiquitination and extraction of incompletely synthesized nascent chains for proteasomal degradation (PubMed:23178123, PubMed:24261871). CDC48 may provide the mechanical force that dislodges the polyubiquitinated nascent peptides from the exit channel (PubMed:23178123, PubMed:24261871). Required for ribophagy, a process which relocalizes ribosomal particles into the vacuole for degradation in response to starvation (PubMed:20508643).<ref>PMID:11733065</ref> <ref>PMID:11740563</ref> <ref>PMID:11813000</ref> <ref>PMID:11847109</ref> <ref>PMID:14636562</ref> <ref>PMID:16428438</ref> <ref>PMID:20508643</ref> <ref>PMID:21070972</ref> <ref>PMID:21148305</ref> <ref>PMID:21454554</ref> <ref>PMID:23178123</ref> <ref>PMID:24261871</ref> <ref>PMID:27044889</ref> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The Cdc48 AAA+ ATPase is an abundant and essential enzyme that unfolds substrates in multiple protein quality control pathways. The enzyme includes two conserved AAA+ ATPase motor domains, D1 and D2, that assemble as hexameric rings with D1 stacked above D2. Here, we report an ensemble of native structures of Cdc48 affinity purified from budding yeast lysate in complex with the adaptor Shp1 in the act of unfolding substrate. Our analysis reveals a continuum of structural snapshots that spans the entire translocation cycle. These data uncover elements of Shp1-Cdc48 interactions and support a 'hand-over-hand' mechanism in which the sequential movement of individual subunits is closely coordinated. D1 hydrolyzes ATP and disengages from substrate prior to D2, while D2 rebinds ATP and re-engages with substrate prior to D1, thereby explaining the dominant role played by the D2 motor in substrate translocation/unfolding. | |||
Visualization of the Cdc48 AAA+ ATPase protein unfolding pathway.,Cooney I, Schubert HL, Cedeno K, Fisher ON, Carson R, Price JC, Hill CP, Shen PS Nat Commun. 2024 Aug 29;15(1):7505. doi: 10.1038/s41467-024-51835-3. PMID:39209885<ref>PMID:39209885</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
[[Category: | </div> | ||
[[Category: | <div class="pdbe-citations 8ub4" style="background-color:#fffaf0;"></div> | ||
[[Category: | == References == | ||
[[Category: | <references/> | ||
[[Category: | __TOC__ | ||
[[Category: | </StructureSection> | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: | [[Category: Saccharomyces cerevisiae]] | ||
[[Category: | [[Category: Carson R]] | ||
[[Category: Cedeno K]] | |||
[[Category: Cooney I]] | |||
[[Category: Fisher ON]] | |||
[[Category: Hill CP]] | |||
[[Category: Price JC]] | |||
[[Category: Schubert HL]] | |||
[[Category: Shen PS]] |
Latest revision as of 11:07, 6 November 2024
Cdc48-Shp1 unfolding native substrate, consensus structureCdc48-Shp1 unfolding native substrate, consensus structure
Structural highlights
FunctionCDC48_YEAST ATP-dependent chaperone which probably uses the energy provided by ATP hydrolysis to generate mechanical force to unfold substrate proteins, disassemble protein complexes, and disaggregate protein aggregates (PubMed:21454554). By recruiting and promoting the degradation of ubiquitinated proteins, plays a role in the ubiquitin fusion degradation (UFD) pathway (PubMed:16428438). Has a role in the endoplasmic reticulum-associated degradation (ERAD) pathway which mediates the cytoplasmic elimination of misfolded proteins exported from the ER (PubMed:11813000, PubMed:11740563, PubMed:11847109, PubMed:21148305). Required for the proteasome-dependent processing/activation of MGA2 and SPT23 transcription factors leading to the subsequent expression of OLE1 (PubMed:11847109, PubMed:11733065). Has an additional role in the turnover of OLE1 where it targets ubiquitinated OLE1 and other proteins to the ERAD (PubMed:11847109). Regulates ubiquitin-mediated mitochondria protein degradation (PubMed:21070972, PubMed:27044889). Involved in spindle disassembly probably by promoting the degradation of spindle assembly factors ASE1 and CDC5 at the end of mitosis (PubMed:14636562). Component of the ribosome quality control complex (RQC), a ribosome-associated complex that mediates ubiquitination and extraction of incompletely synthesized nascent chains for proteasomal degradation (PubMed:23178123, PubMed:24261871). CDC48 may provide the mechanical force that dislodges the polyubiquitinated nascent peptides from the exit channel (PubMed:23178123, PubMed:24261871). Required for ribophagy, a process which relocalizes ribosomal particles into the vacuole for degradation in response to starvation (PubMed:20508643).[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] Publication Abstract from PubMedThe Cdc48 AAA+ ATPase is an abundant and essential enzyme that unfolds substrates in multiple protein quality control pathways. The enzyme includes two conserved AAA+ ATPase motor domains, D1 and D2, that assemble as hexameric rings with D1 stacked above D2. Here, we report an ensemble of native structures of Cdc48 affinity purified from budding yeast lysate in complex with the adaptor Shp1 in the act of unfolding substrate. Our analysis reveals a continuum of structural snapshots that spans the entire translocation cycle. These data uncover elements of Shp1-Cdc48 interactions and support a 'hand-over-hand' mechanism in which the sequential movement of individual subunits is closely coordinated. D1 hydrolyzes ATP and disengages from substrate prior to D2, while D2 rebinds ATP and re-engages with substrate prior to D1, thereby explaining the dominant role played by the D2 motor in substrate translocation/unfolding. Visualization of the Cdc48 AAA+ ATPase protein unfolding pathway.,Cooney I, Schubert HL, Cedeno K, Fisher ON, Carson R, Price JC, Hill CP, Shen PS Nat Commun. 2024 Aug 29;15(1):7505. doi: 10.1038/s41467-024-51835-3. PMID:39209885[14] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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