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Yorodumi- EMDB-53253: Activated 9-subunit COP9 signalosome and neddylated SCF (SKP1-SKP... -
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Basic information
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| Title | Activated 9-subunit COP9 signalosome and neddylated SCF (SKP1-SKP2-CKS1) complex structure | |||||||||
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Keywords | Cullin-RING E3 ligases / COP9 signalosome / LIGASE | |||||||||
| Function / homology | Function and homology informationnegative regulation of protein neddylation / negative regulation of protein localization to nucleolus / COP9 signalosome assembly / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / regulation of IRE1-mediated unfolded protein response / Parkin-FBXW7-Cul1 ubiquitin ligase complex / exosomal secretion / GTPase inhibitor activity / deNEDDylase activity ...negative regulation of protein neddylation / negative regulation of protein localization to nucleolus / COP9 signalosome assembly / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / regulation of IRE1-mediated unfolded protein response / Parkin-FBXW7-Cul1 ubiquitin ligase complex / exosomal secretion / GTPase inhibitor activity / deNEDDylase activity / protein deneddylation / regulation of protein neddylation / activation of NF-kappaB-inducing kinase activity / eukaryotic translation initiation factor 3 complex / negative regulation of beige fat cell differentiation / cellular response to camptothecin / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / COP9 signalosome / cullin-RING ubiquitin ligase complex / Cul7-RING ubiquitin ligase complex / cellular response to chemical stress / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / positive regulation of protein autoubiquitination / RNA polymerase II transcription initiation surveillance / protein neddylation / NEDD8 ligase activity / Hydrolases; Acting on peptide bonds (peptidases) / protein K27-linked ubiquitination / regulation of JNK cascade / metal-dependent deubiquitinase activity / negative regulation of response to oxidative stress / RHOBTB1 GTPase cycle / regulation of DNA damage response, signal transduction by p53 class mediator / VCB complex / inner cell mass cell proliferation / Cul5-RING ubiquitin ligase complex / ubiquitin-ubiquitin ligase activity / SCF ubiquitin ligase complex / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / Cul2-RING ubiquitin ligase complex / Cul3-RING ubiquitin ligase complex / negative regulation of type I interferon production / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Prolactin receptor signaling / negative regulation of mitophagy / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / TGF-beta receptor signaling activates SMADs / regulation of proteolysis / skeletal muscle cell differentiation / : / regulation of postsynapse assembly / cullin family protein binding / response to light stimulus / anatomical structure morphogenesis / protein monoubiquitination / site of DNA damage / JNK cascade / signal transduction in response to DNA damage / Nuclear events stimulated by ALK signaling in cancer / transcription-coupled nucleotide-excision repair / protein K48-linked ubiquitination / negative regulation of insulin receptor signaling pathway / translation initiation factor activity / regulation of cellular response to insulin stimulus / positive regulation of TORC1 signaling / intrinsic apoptotic signaling pathway / post-translational protein modification / animal organ morphogenesis / T cell activation / Regulation of BACH1 activity / protein modification process / MAP3K8 (TPL2)-dependent MAPK1/3 activation / negative regulation of canonical NF-kappaB signal transduction / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / cellular response to amino acid stimulus / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of CRY and PER proteins / Activation of NF-kappaB in B cells / G1/S transition of mitotic cell cycle / Degradation of GLI1 by the proteasome / Iron uptake and transport / negative regulation of canonical Wnt signaling pathway / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Recognition of DNA damage by PCNA-containing replication complex / Hedgehog 'on' state / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Vif-mediated degradation of APOBEC3G / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / RING-type E3 ubiquitin transferase / Degradation of beta-catenin by the destruction complex / DNA Damage Recognition in GG-NER Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.23 Å | |||||||||
Authors | Ding S / Clapperton JA / Maeots ME / Shaaban M / Enchev RI | |||||||||
| Funding support | United Kingdom, 1 items
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Citation | Journal: Nat Commun / Year: 2026Title: Structural basis of CSN-mediated SCF deneddylation. Authors: Shan Ding / Julie A Clapperton / Märt-Erik Mäeots / Simone Kunzelmann / Mohammed Shaaban / Radoslav I Enchev / ![]() Abstract: Cullin-RING ligases (CRLs) are the largest family of E3 ligases, with ubiquitination activity dynamically regulated by neddylation and deneddylation by the COP9 signalosome (CSN). CSN-mediated ...Cullin-RING ligases (CRLs) are the largest family of E3 ligases, with ubiquitination activity dynamically regulated by neddylation and deneddylation by the COP9 signalosome (CSN). CSN-mediated deneddylation not only deactivates CRLs but also enables substrate receptor exchange. Although CSN is a promising drug target, the structural basis underlying its catalytic mechanism remains unclear. Here, we use cryo-electron microscopy (cryo-EM) to uncover distinct functional states of CSN-CRL (SCF) complexes, capturing key intermediates of the deneddylation cycle. We visualise an autoinhibited docking state and a catalytic intermediate in which CSN5 Ins-1 loop, RBX1 RING and neddylated Cullin WHB domains are repositioned for isopeptide cleavage. We further resolve four dissociation intermediates that define the stepwise release of CSN from its product, with RBX1 RING stabilising key interactions. Additionally, our structures locate CSNAP within a CSN3-CSN8 groove. Together, our study provides a mechanistic model for CSN function and informs the rational design of CSN-targeted therapeutics. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_53253.map.gz | 111.1 MB | EMDB map data format | |
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| Header (meta data) | emd-53253-v30.xml emd-53253.xml | 36.9 KB 36.9 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_53253_fsc.xml | 11.4 KB | Display | FSC data file |
| Images | emd_53253.png | 97.2 KB | ||
| Filedesc metadata | emd-53253.cif.gz | 9.4 KB | ||
| Others | emd_53253_half_map_1.map.gz emd_53253_half_map_2.map.gz | 98.5 MB 98.5 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-53253 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-53253 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9qo1MC ![]() 9qo0C ![]() 9qo2C ![]() 9qo3C ![]() 9qo4C ![]() 9qo5C ![]() 9qo6C M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_53253.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.08 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: #2
| File | emd_53253_half_map_1.map | ||||||||||||
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| Density Histograms |
-Half map: #1
| File | emd_53253_half_map_2.map | ||||||||||||
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| Density Histograms |
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Sample components
+Entire : COP9 signalosome and neddylated SCF complex
+Supramolecule #1: COP9 signalosome and neddylated SCF complex
+Supramolecule #2: COP9 signalosome
+Supramolecule #3: Neddylated Cullin-1/Rbx1 complex
+Supramolecule #4: Cullin-1/Rbx1
+Supramolecule #5: Nedd8
+Macromolecule #1: COP9 signalosome complex subunit 1
+Macromolecule #2: COP9 signalosome complex subunit 2
+Macromolecule #3: COP9 signalosome complex subunit 3
+Macromolecule #4: COP9 signalosome complex subunit 4
+Macromolecule #5: COP9 signalosome complex subunit 5
+Macromolecule #6: COP9 signalosome complex subunit 6
+Macromolecule #7: COP9 signalosome complex subunit 7b
+Macromolecule #8: COP9 signalosome complex subunit 8
+Macromolecule #9: Cullin-1
+Macromolecule #10: E3 ubiquitin-protein ligase RBX1
+Macromolecule #11: COP9 signalosome complex subunit 9
+Macromolecule #12: NEDD8
+Macromolecule #13: INOSITOL HEXAKISPHOSPHATE
+Macromolecule #14: ZINC ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| 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 | TFS KRIOS |
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| Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Average electron dose: 47.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 5.0 µm / Nominal defocus min: 0.5 µm |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United Kingdom, 1 items
Citation






















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Processing
FIELD EMISSION GUN

