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Basic information
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Title | Cryo-EM Structure of the KBTBD2-CRL3~N8(removed)-CSN complex | |||||||||
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![]() | ligase / complex | |||||||||
Function / homology | ![]() COP9 signalosome assembly / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / regulation of IRE1-mediated unfolded protein response / exosomal secretion / GTPase inhibitor activity ...COP9 signalosome assembly / trophectodermal cell proliferation / macrophage migration inhibitory factor binding / positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / regulation of IRE1-mediated unfolded protein response / exosomal secretion / GTPase inhibitor activity / deNEDDylase activity / protein deneddylation / nuclear protein quality control by the ubiquitin-proteasome system / regulation of protein neddylation / polar microtubule / eukaryotic translation initiation factor 3 complex / activation of NF-kappaB-inducing kinase activity / COPII vesicle coating / anaphase-promoting complex-dependent catabolic process / regulation protein catabolic process at postsynapse / cullin-RING-type E3 NEDD8 transferase / RHOBTB3 ATPase cycle / NEDD8 transferase activity / COP9 signalosome / cell projection organization / cullin-RING ubiquitin ligase complex / positive regulation of mitotic metaphase/anaphase transition / embryonic cleavage / cellular response to chemical stress / Cul7-RING ubiquitin ligase complex / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / stem cell division / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / positive regulation of protein autoubiquitination / protein neddylation / regulation of JNK cascade / Hydrolases; Acting on peptide bonds (peptidases) / Notch binding / metal-dependent deubiquitinase activity / NEDD8 ligase activity / fibroblast apoptotic process / negative regulation of response to oxidative stress / RHOBTB1 GTPase cycle / Cul5-RING ubiquitin ligase complex / regulation of DNA damage response, signal transduction by p53 class mediator / SCF ubiquitin ligase complex / inner cell mass cell proliferation / Cul2-RING ubiquitin ligase complex / Cul4A-RING E3 ubiquitin ligase complex / ubiquitin-ubiquitin ligase activity / negative regulation of type I interferon production / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Cul3-RING ubiquitin ligase complex / mitotic metaphase chromosome alignment / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / negative regulation of mitophagy / negative regulation of Rho protein signal transduction / stress fiber assembly / Prolactin receptor signaling / positive regulation of cytokinesis / skeletal muscle cell differentiation / cullin family protein binding / sperm flagellum / response to light stimulus / protein monoubiquitination / endoplasmic reticulum to Golgi vesicle-mediated transport / ubiquitin-like ligase-substrate adaptor activity / protein K48-linked ubiquitination / RHOBTB2 GTPase cycle / protein autoubiquitination / Nuclear events stimulated by ALK signaling in cancer / JNK cascade / gastrulation / translation initiation factor activity / regulation of cellular response to insulin stimulus / positive regulation of TORC1 signaling / negative regulation of insulin receptor signaling pathway / post-translational protein modification / intrinsic apoptotic signaling pathway / cyclin binding / T cell activation / positive regulation of DNA-binding transcription factor activity / Regulation of BACH1 activity / positive regulation of protein ubiquitination / kidney development / integrin-mediated signaling pathway / phosphatidylinositol 3-kinase/protein kinase B signal transduction / response to insulin / cellular response to amino acid stimulus / Degradation of DVL / Degradation of GLI1 by the proteasome / Recognition of DNA damage by PCNA-containing replication complex / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / negative regulation of canonical Wnt signaling pathway / Negative regulation of NOTCH4 signaling / Vif-mediated degradation of APOBEC3G / Hedgehog 'on' state / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 7.51 Å | |||||||||
![]() | Hu Y / Mao Q / Chen Z / Sun L | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Dynamic molecular architecture and substrate recruitment of cullin3-RING E3 ligase CRL3. Authors: Yuxia Hu / Zhao Zhang / Qiyu Mao / Xiang Zhang / Aihua Hao / Yu Xun / Yeda Wang / Lin Han / Wuqiang Zhan / Qianying Liu / Yue Yin / Chao Peng / Eva Marie Y Moresco / Zhenguo Chen / Bruce Beutler / Lei Sun / ![]() ![]() Abstract: Phosphatidylinositol 3-kinase α, a heterodimer of catalytic p110α and one of five regulatory subunits, mediates insulin- and insulin like growth factor-signaling and, frequently, oncogenesis. ...Phosphatidylinositol 3-kinase α, a heterodimer of catalytic p110α and one of five regulatory subunits, mediates insulin- and insulin like growth factor-signaling and, frequently, oncogenesis. Cellular levels of the regulatory p85α subunit are tightly controlled by regulated proteasomal degradation. In adipose tissue and growth plates, failure of K48-linked p85α ubiquitination causes diabetes, lipodystrophy and dwarfism in mice, as in humans with SHORT syndrome. Here we elucidated the structures of the key ubiquitin ligase complexes regulating p85α availability. Specificity is provided by the substrate receptor KBTBD2, which recruits p85α to the cullin3-RING E3 ubiquitin ligase (CRL3). CRL3 forms multimers, which disassemble into dimers upon substrate binding (CRL3-p85α) and/or neddylation by the activator NEDD8 (CRL3~N8), leading to p85α ubiquitination and degradation. Deactivation involves dissociation of NEDD8 mediated by the COP9 signalosome and displacement of KBTBD2 by the inhibitor CAND1. The hereby identified structural basis of p85α regulation opens the way to better understanding disturbances of glucose regulation, growth and cancer. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 34.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 31.1 KB 31.1 KB | Display Display | ![]() |
Images | ![]() | 99.3 KB | ||
Filedesc metadata | ![]() | 9.1 KB | ||
Others | ![]() ![]() | 29.6 MB 29.6 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8h3aMC ![]() 8gq6C ![]() 8h33C ![]() 8h34C ![]() 8h35C ![]() 8h36C ![]() 8h37C ![]() 8h38C ![]() 8h3fC ![]() 8h3qC ![]() 8h3rC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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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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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 2.088 Å | ||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
File | emd_34462_half_map_1.map | ||||||||||||
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Projections & Slices |
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Density Histograms |
-Half map: #1
File | emd_34462_half_map_2.map | ||||||||||||
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Density Histograms |
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Sample components
+Entire : Cryo-EM Structure of the KBTBD2-CRL3~N8-CSN complex
+Supramolecule #1: Cryo-EM Structure of the KBTBD2-CRL3~N8-CSN complex
+Supramolecule #2: CSN
+Supramolecule #3: KBTBD2, Cullin-3, Rbx1
+Macromolecule #1: COP9 signalosome complex subunit 5
+Macromolecule #2: COP9 signalosome complex subunit 1
+Macromolecule #3: COP9 signalosome complex subunit 2
+Macromolecule #4: COP9 signalosome complex subunit 3
+Macromolecule #5: COP9 signalosome complex subunit 4
+Macromolecule #6: COP9 signalosome complex subunit 6
+Macromolecule #7: COP9 signalosome complex subunit 7b
+Macromolecule #8: COP9 signalosome complex subunit 8
+Macromolecule #9: Kelch repeat and BTB domain-containing protein 2
+Macromolecule #10: Cullin-3
+Macromolecule #11: E3 ubiquitin-protein ligase RBX1
+Macromolecule #12: ZINC ION
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.8 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 53.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 1.2 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: PDB ENTRY PDB model - PDB ID: Details: 6r7f |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 7.51 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 55391 |
Initial angle assignment | Type: PROJECTION MATCHING |
Final angle assignment | Type: PROJECTION MATCHING |