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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-9773 | |||||||||
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Title | yeast proteasome in Ub-engaged state (C2)![]() | |||||||||
![]() | Ub-engaged C2 | |||||||||
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Function / homology | ![]() SAGA complex localization to transcription regulatory region / peroxisome fission / proteasome storage granule assembly / transcription export complex 2 / proteasome regulatory particle assembly / protein deneddylation / nonfunctional rRNA decay / maintenance of DNA trinucleotide repeats / filamentous growth / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Cong Y | |||||||||
![]() | ![]() Title: Structural Snapshots of 26S Proteasome Reveal Tetraubiquitin-Induced Conformations. Authors: Zhanyu Ding / Cong Xu / Indrajit Sahu / Yifan Wang / Zhenglin Fu / Min Huang / Catherine C L Wong / Michael H Glickman / Yao Cong / ![]() ![]() Abstract: The 26S proteasome is the ATP-dependent protease responsible for regulating the proteome of eukaryotic cells through degradation of mainly ubiquitin-tagged substrates. In order to understand how ...The 26S proteasome is the ATP-dependent protease responsible for regulating the proteome of eukaryotic cells through degradation of mainly ubiquitin-tagged substrates. In order to understand how proteasome responds to ubiquitin signal, we resolved an ensemble of cryo-EM structures of proteasome in the presence of K48-Ub, with three of them resolved at near-atomic resolution. We identified a conformation with stabilized ubiquitin receptors and a previously unreported orientation of the lid, assigned as a Ub-accepted state C1-b. We determined another structure C3-b with localized K48-Ub to the toroid region of Rpn1, assigned as a substrate-processing state. Our structures indicate that tetraUb induced conformational changes in proteasome could initiate substrate degradation. We also propose a CP gate-opening mechanism involving the propagation of the motion of the lid to the gate through the Rpn6-α2 interaction. Our results enabled us to put forward a model of a functional cycle for proteasomes induced by tetraUb and nucleotide. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 13.3 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 46.9 KB 46.9 KB | Display Display | ![]() |
Images | ![]() | 151.7 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6j30MC ![]() 9769C ![]() 9770C ![]() 9771C ![]() 9772C ![]() 6j2cC ![]() 6j2nC ![]() 6j2qC ![]() 6j2xC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Ub-engaged C2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.318 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : Yeast proteasome
+Supramolecule #1: Yeast proteasome
+Macromolecule #1: Proteasome subunit beta type-1
+Macromolecule #2: Proteasome subunit beta type-2
+Macromolecule #3: Proteasome subunit beta type-3
+Macromolecule #4: Proteasome subunit beta type-4
+Macromolecule #5: Proteasome subunit beta type-5
+Macromolecule #6: Proteasome subunit beta type-6
+Macromolecule #7: Proteasome subunit beta type-7
+Macromolecule #8: Proteasome subunit alpha type-1
+Macromolecule #9: Proteasome subunit alpha type-2
+Macromolecule #10: Proteasome subunit alpha type-3
+Macromolecule #11: Proteasome subunit alpha type-4
+Macromolecule #12: Proteasome subunit alpha type-5
+Macromolecule #13: Proteasome subunit alpha type-6
+Macromolecule #14: Probable proteasome subunit alpha type-7
+Macromolecule #15: 26S proteasome regulatory subunit 7 homolog
+Macromolecule #16: 26S proteasome regulatory subunit 4 homolog
+Macromolecule #17: 26S proteasome regulatory subunit 8 homolog
+Macromolecule #18: 26S proteasome regulatory subunit 6B homolog
+Macromolecule #19: 26S proteasome subunit RPT4
+Macromolecule #20: 26S proteasome regulatory subunit 6A
+Macromolecule #21: 26S proteasome regulatory subunit RPN2
+Macromolecule #22: 26S proteasome regulatory subunit RPN9
+Macromolecule #23: 26S proteasome regulatory subunit RPN5
+Macromolecule #24: 26S proteasome regulatory subunit RPN6
+Macromolecule #25: 26S proteasome regulatory subunit RPN7
+Macromolecule #26: 26S proteasome regulatory subunit RPN3
+Macromolecule #27: 26S proteasome regulatory subunit RPN12
+Macromolecule #28: 26S proteasome regulatory subunit RPN8
+Macromolecule #29: Ubiquitin carboxyl-terminal hydrolase RPN11
+Macromolecule #30: 26S proteasome regulatory subunit RPN10
+Macromolecule #31: 26S proteasome regulatory subunit RPN13
+Macromolecule #32: 26S proteasome complex subunit SEM1
+Macromolecule #33: 26S proteasome regulatory subunit RPN1
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 38.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Initial angle assignment | Type: PROJECTION MATCHING |
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Final angle assignment | Type: MAXIMUM LIKELIHOOD |
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 4.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 40585 |