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- PDB-9jkb: Cryo-EM structure of the CUL1-RBX1-SKP1-FBXO4 SCF ubiquition liga... -

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Basic information

Entry
Database: PDB / ID: 9jkb
TitleCryo-EM structure of the CUL1-RBX1-SKP1-FBXO4 SCF ubiquition ligase complex
Components
  • Cullin-1
  • E3 ubiquitin-protein ligase RBX1, N-terminally processed
  • F-box only protein 4
  • S-phase kinase-associated protein 1
KeywordsPROTEIN BINDING / ubiquitination E3 ligase / Cryo-EM
Function / homology
Function and homology information


positive regulation of protein polyubiquitination / Parkin-FBXW7-Cul1 ubiquitin ligase complex / common myeloid progenitor cell proliferation / F-box domain binding / PcG protein complex / negative regulation of beige fat cell differentiation / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / cellular homeostasis / cullin-RING ubiquitin ligase complex ...positive regulation of protein polyubiquitination / Parkin-FBXW7-Cul1 ubiquitin ligase complex / common myeloid progenitor cell proliferation / F-box domain binding / PcG protein complex / negative regulation of beige fat cell differentiation / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / cellular homeostasis / cullin-RING ubiquitin ligase complex / maintenance of protein location in nucleus / Cul7-RING ubiquitin ligase complex / cellular response to chemical stress / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / regulation of DNA damage checkpoint / positive regulation of protein autoubiquitination / RNA polymerase II transcription initiation surveillance / protein neddylation / ubiquitin ligase activator activity / NEDD8 ligase activity / protein K27-linked ubiquitination / negative regulation of response to oxidative stress / negative regulation of protein localization to nucleus / VCB complex / Cul5-RING ubiquitin ligase complex / post-transcriptional regulation of gene expression / ubiquitin-ubiquitin ligase activity / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / SCF ubiquitin ligase complex / 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 / Prolactin receptor signaling / negative regulation of mitophagy / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Association of TriC/CCT with target proteins during biosynthesis / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / cullin family protein binding / protein monoubiquitination / ubiquitin ligase complex / negative regulation of fibroblast proliferation / ubiquitin-like ligase-substrate adaptor activity / site of DNA damage / signal transduction in response to DNA damage / positive regulation of telomere maintenance via telomerase / Nuclear events stimulated by ALK signaling in cancer / protein K48-linked ubiquitination / negative regulation of insulin receptor signaling pathway / regulation of cellular response to insulin stimulus / positive regulation of TORC1 signaling / transcription-coupled nucleotide-excision repair / post-translational protein modification / intrinsic apoptotic signaling pathway / telomere maintenance / molecular function activator activity / animal organ morphogenesis / T cell activation / positive regulation of protein ubiquitination / Regulation of BACH1 activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / cellular response to ionizing radiation / negative regulation of canonical NF-kappaB signal transduction / cellular response to amino acid stimulus / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / regulation of protein stability / negative regulation of canonical Wnt signaling pathway / Vpu mediated degradation of CD4 / G1/S transition of mitotic cell cycle / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of DVL / Degradation of CRY and PER proteins / Iron uptake and transport / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / Recognition of DNA damage by PCNA-containing replication complex / RING-type E3 ubiquitin transferase / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Vif-mediated degradation of APOBEC3G / beta-catenin binding / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / protein destabilization / NOTCH1 Intracellular Domain Regulates Transcription / Evasion by RSV of host interferon responses / Degradation of beta-catenin by the destruction complex / DNA Damage Recognition in GG-NER / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / CLEC7A (Dectin-1) signaling / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER)
Similarity search - Function
F-box only protein 4 / A Receptor for Ubiquitination Targets / F-box domain profile. / F-box-like / F-box-like domain superfamily / SKP1 component, dimerisation / S-phase kinase-associated protein 1 / SKP1-like, dimerisation domain superfamily / Skp1 family, dimerisation domain / F-box domain ...F-box only protein 4 / A Receptor for Ubiquitination Targets / F-box domain profile. / F-box-like / F-box-like domain superfamily / SKP1 component, dimerisation / S-phase kinase-associated protein 1 / SKP1-like, dimerisation domain superfamily / Skp1 family, dimerisation domain / F-box domain / Zinc finger, RING-H2-type / RING-H2 zinc finger domain / : / Cullin protein neddylation domain / Cullin, N-terminal / Cullin, conserved site / Cullin family signature. / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin alpha solenoid domain / Cullin protein neddylation domain / Cullin / : / Cullin alpha+beta domain / Cullin homology domain / Cullin homology domain superfamily / Cullin family profile. / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / 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 / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
E3 ubiquitin-protein ligase RBX1 / S-phase kinase-associated protein 1 / Cullin-1 / F-box only protein 4
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.93 Å
AuthorsZhu, W. / Xu, C.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Biochem Biophys Res Commun / Year: 2024
Title: Structure of the CUL1-RBX1-SKP1-FBXO4 SCF ubiquitin ligase complex.
Authors: Wenjie Zhu / Xinyan Chen / Jiahai Zhang / Chao Xu /
Abstract: Cullin-RING E3 ubiquitin ligases (CRLs) constitute the largest family of ubiquitin ligase and play important roles in regulation of proteostasis. Here we presented the cryo-EM structure of CRL1, a ...Cullin-RING E3 ubiquitin ligases (CRLs) constitute the largest family of ubiquitin ligase and play important roles in regulation of proteostasis. Here we presented the cryo-EM structure of CRL1, a member of Cullin-1 E3 ligase. CRL1 adopts a homodimer architecture. Structural analysis revealed that in the CRL1 protomer, the substrate recognition subunit FBXO4 interacts both the adaptor protein SKP1, and the scaffold protein CUL1 via hydrophobic and electrostatic interactions. Two FBXO4 forms a domain-swapped dimer in the CRL1 structure, which constitutes the basis for the dimerization of CRL1. Inspired by the cryo-EM density, we modeled the architecture of whole CRL1 as a symmetrical dimer, which provides insights into CRL1-medaited turnover of oncogene proteins.
History
DepositionSep 15, 2024Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Oct 23, 2024Provider: repository / Type: Initial release
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
C: F-box only protein 4
A: Cullin-1
B: S-phase kinase-associated protein 1
R: E3 ubiquitin-protein ligase RBX1, N-terminally processed
D: F-box only protein 4


Theoretical massNumber of molelcules
Total (without water)194,2885
Polymers194,2885
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein F-box only protein 4


Mass: 36247.145 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: FBXO4, FBX4 / Production host: Escherichia coli (E. coli) / References: UniProt: Q9UKT5
#2: Protein Cullin-1 / CUL-1


Mass: 91715.352 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CUL1 / Production host: Escherichia coli (E. coli) / References: UniProt: Q13616
#3: Protein S-phase kinase-associated protein 1 / Cyclin-A/CDK2-associated protein p19 / p19A / Organ of Corti protein 2 / OCP-2 / Organ of Corti ...Cyclin-A/CDK2-associated protein p19 / p19A / Organ of Corti protein 2 / OCP-2 / Organ of Corti protein II / OCP-II / RNA polymerase II elongation factor-like protein / SIII / Transcription elongation factor B polypeptide 1-like / p19skp1


Mass: 18881.146 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SKP1, EMC19, OCP2, SKP1A, TCEB1L / Production host: Escherichia coli (E. coli) / References: UniProt: P63208
#4: Protein E3 ubiquitin-protein ligase RBX1, N-terminally processed / E3 ubiquitin-protein transferase RBX1 / N-terminally processed


Mass: 11196.830 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RBX1, RNF75, ROC1 / Production host: Escherichia coli (E. coli) / References: UniProt: P62877
Has protein modificationN

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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: Cryo-EM of the CUL1-RBX1-SKP1-FBXO4 SCF ubiquition ligase complex
Type: COMPLEX
Details: Cryo-EM of the CUL1-RBX1-SKP1-FBXO4 SCF ubiquition ligase complex
Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K

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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: 2900 nm / Nominal defocus min: 1500 nm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 55.8 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.93 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 102037 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0039716
ELECTRON MICROSCOPYf_angle_d0.66613132
ELECTRON MICROSCOPYf_dihedral_angle_d4.3171267
ELECTRON MICROSCOPYf_chiral_restr0.0431466
ELECTRON MICROSCOPYf_plane_restr0.0051685

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