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- PDB-8h34: Cryo-EM Structure of the KBTBD2-Cul3-Rbx1 hexameric complex -

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Basic information

Entry
Database: PDB / ID: 8h34
TitleCryo-EM Structure of the KBTBD2-Cul3-Rbx1 hexameric complex
Components
  • Cullin-3
  • E3 ubiquitin-protein ligase RBX1
  • Kelch repeat and BTB domain-containing protein 2
KeywordsLIGASE / complex
Function / homology
Function and homology information


positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / polar microtubule / nuclear protein quality control by the ubiquitin-proteasome system / COPII vesicle coating / regulation protein catabolic process at postsynapse / anaphase-promoting complex-dependent catabolic process / negative regulation of beige fat cell differentiation ...positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / polar microtubule / nuclear protein quality control by the ubiquitin-proteasome system / COPII vesicle coating / regulation protein catabolic process at postsynapse / anaphase-promoting complex-dependent catabolic process / negative regulation of beige fat cell differentiation / RHOBTB3 ATPase cycle / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / embryonic cleavage / 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 / protein K27-linked ubiquitination / positive regulation of mitotic metaphase/anaphase transition / positive regulation of protein autoubiquitination / RNA polymerase II transcription initiation surveillance / Notch binding / protein neddylation / fibroblast apoptotic process / cell projection organization / NEDD8 ligase activity / negative regulation of Rho protein signal transduction / RHOBTB1 GTPase cycle / negative regulation of response to oxidative stress / VCB complex / Cul5-RING ubiquitin ligase complex / ubiquitin-ubiquitin ligase activity / stem cell division / SCF ubiquitin ligase complex / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / mitotic metaphase chromosome alignment / negative regulation of type I interferon production / Cul2-RING ubiquitin ligase complex / Cul3-RING ubiquitin ligase complex / stress fiber assembly / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / negative regulation of mitophagy / positive regulation of cytokinesis / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Prolactin receptor signaling / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / cullin family protein binding / endoplasmic reticulum to Golgi vesicle-mediated transport / protein monoubiquitination / RHOBTB2 GTPase cycle / sperm flagellum / site of DNA damage / protein autoubiquitination / protein K48-linked ubiquitination / ubiquitin-like ligase-substrate adaptor activity / signal transduction in response to DNA damage / Nuclear events stimulated by ALK signaling in cancer / transcription-coupled nucleotide-excision repair / gastrulation / 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 / positive regulation of protein ubiquitination / Regulation of BACH1 activity / T cell activation / integrin-mediated signaling pathway / negative regulation of canonical NF-kappaB signal transduction / lipid metabolic process / kidney development / cellular response to amino acid stimulus / phosphatidylinositol 3-kinase/protein kinase B signal transduction / Degradation of DVL / Degradation of CRY and PER proteins / G1/S transition of mitotic cell cycle / Degradation of GLI1 by the proteasome / negative regulation of canonical Wnt signaling pathway / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / Recognition of DNA damage by PCNA-containing replication complex / Vif-mediated degradation of APOBEC3G / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / 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 / response to insulin / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / DNA Damage Recognition in GG-NER / protein destabilization / NOTCH1 Intracellular Domain Regulates Transcription / Evasion by RSV of host interferon responses / Constitutive Signaling by NOTCH1 PEST Domain Mutants
Similarity search - Function
Kelch repeat and BTB domain-containing protein 2 / : / Zinc finger, RING-H2-type / RING-H2 zinc finger domain / BTB-kelch protein / BTB/Kelch-associated / BTB And C-terminal Kelch / BTB And C-terminal Kelch / Kelch / Kelch motif ...Kelch repeat and BTB domain-containing protein 2 / : / Zinc finger, RING-H2-type / RING-H2 zinc finger domain / BTB-kelch protein / BTB/Kelch-associated / BTB And C-terminal Kelch / BTB And C-terminal Kelch / Kelch / Kelch motif / : / Cullin alpha+beta domain / Cullin protein neddylation domain / : / Kelch repeat type 1 / Cullin, conserved site / Cullin family signature. / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Cullin, N-terminal / Cullin alpha solenoid domain / Cullin / Cullin homology domain / Cullin homology domain superfamily / Cullin family profile. / Kelch-type beta propeller / BTB/POZ domain / BTB domain profile. / Broad-Complex, Tramtrack and Bric a brac / BTB/POZ domain / SKP1/BTB/POZ domain superfamily / Zinc finger RING-type profile. / Zinc finger, RING-type / Zinc finger, RING/FYVE/PHD-type / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
E3 ubiquitin-protein ligase RBX1 / Cullin-3 / Kelch repeat and BTB domain-containing protein 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 7.99 Å
AuthorsHu, Y. / Mao, Q. / Chen, Z. / Sun, L.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)81900729 China
CitationJournal: Nat Struct Mol Biol / Year: 2024
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
DepositionOct 7, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 11, 2023Provider: repository / Type: Initial release
Revision 1.1Mar 20, 2024Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
M: Cullin-3
O: Cullin-3
P: Kelch repeat and BTB domain-containing protein 2
N: Kelch repeat and BTB domain-containing protein 2
R: E3 ubiquitin-protein ligase RBX1
Q: E3 ubiquitin-protein ligase RBX1
C: Cullin-3
A: Kelch repeat and BTB domain-containing protein 2
B: Kelch repeat and BTB domain-containing protein 2
F: Cullin-3
E: E3 ubiquitin-protein ligase RBX1
D: E3 ubiquitin-protein ligase RBX1
G: Kelch repeat and BTB domain-containing protein 2
J: Kelch repeat and BTB domain-containing protein 2
I: Cullin-3
H: Cullin-3
L: E3 ubiquitin-protein ligase RBX1
K: E3 ubiquitin-protein ligase RBX1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)1,047,80236
Polymers1,046,62518
Non-polymers1,17718
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Cullin-3 / CUL-3


Mass: 89063.328 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CUL3, KIAA0617 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q13618
#2: Protein
Kelch repeat and BTB domain-containing protein 2


Mass: 71403.367 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q8IY47
#3: Protein
E3 ubiquitin-protein ligase RBX1 / E3 ubiquitin-protein transferase RBX1 / Protein ZYP / RING finger protein 75 / RING-box protein 1 / ...E3 ubiquitin-protein transferase RBX1 / Protein ZYP / RING finger protein 75 / RING-box protein 1 / Rbx1 / Regulator of cullins 1 / ROC1


Mass: 13970.756 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RBX1, RNF75, ROC1 / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: P62877, RING-type E3 ubiquitin transferase, cullin-RING-type E3 NEDD8 transferase
#4: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 18 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: KBTBD2-Cul3-Rbx1 hexameric complex / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 45 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

EM software
IDNameVersionCategory
2SerialEMimage acquisition
13RELION33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 7.99 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 51689 / Symmetry type: POINT

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