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- PDB-9ua3: Cryo-EM structure of neddylated CUL2-RBX1-FEM1C-ELOB-ELOC -

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Basic information

Entry
Database: PDB / ID: 9ua3
TitleCryo-EM structure of neddylated CUL2-RBX1-FEM1C-ELOB-ELOC
Components
  • ALA-ARG-ALA-ARG
  • Cullin-2
  • Elongin-B
  • Elongin-C
  • Protein fem-1 homolog C
KeywordsLIGASE / E3 ubiquitin ligase / ARG/C-degron / degradation
Function / homology
Function and homology information


target-directed miRNA degradation / elongin complex / VCB complex / Cul5-RING ubiquitin ligase complex / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / SCF ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / ubiquitin ligase complex scaffold activity / Pausing and recovery of Tat-mediated HIV elongation ...target-directed miRNA degradation / elongin complex / VCB complex / Cul5-RING ubiquitin ligase complex / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / SCF ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / ubiquitin ligase complex scaffold activity / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / ubiquitin ligase complex / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / Formation of HIV elongation complex in the absence of HIV Tat / ubiquitin-like ligase-substrate adaptor activity / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / RNA Polymerase II Pre-transcription Events / intrinsic apoptotic signaling pathway / transcription corepressor binding / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / G1/S transition of mitotic cell cycle / Vif-mediated degradation of APOBEC3G / Inactivation of CSF3 (G-CSF) signaling / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Evasion by RSV of host interferon responses / Regulation of expression of SLITs and ROBOs / ubiquitin-protein transferase activity / Antigen processing: Ubiquitination & Proteasome degradation / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / Neddylation / protein-containing complex assembly / protein-macromolecule adaptor activity / ubiquitin-dependent protein catabolic process / proteasome-mediated ubiquitin-dependent protein catabolic process / protein ubiquitination / ubiquitin protein ligase binding / regulation of transcription by RNA polymerase II / nucleolus / nucleoplasm / cytosol
Similarity search - Function
Cullin protein neddylation domain / Cullin, conserved site / Elongin-C / Cullin family signature. / Elongin B / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Cullin, N-terminal ...Cullin protein neddylation domain / Cullin, conserved site / Elongin-C / Cullin family signature. / Elongin B / 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. / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / Ankyrin repeat / SKP1/BTB/POZ domain superfamily / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ubiquitin family / Ubiquitin homologues / Tetratricopeptide-like helical domain superfamily / Ubiquitin domain profile. / Ubiquitin-like domain / Ubiquitin-like domain superfamily / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
Cullin-2 / Elongin-C / Elongin-B / Protein fem-1 homolog C
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.28 Å
AuthorsZhou, H. / Xu, C.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: J Mol Cell Biol / Year: 2025
Title: Structural insights into CRL2FEM1C ubiquitin ligase-mediated protein ubiquitination.
Authors: Hualin Zhou / Mor Israel-Gueta / Xinyan Chen / Qiong Guo / Xing Liu / Itay Koren / Chao Xu /
History
DepositionMar 31, 2025Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Mar 4, 2026Provider: repository / Type: Initial release
Revision 1.0Mar 4, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Mar 4, 2026Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Mar 4, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 4, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Mar 4, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Mar 4, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Protein fem-1 homolog C
B: Cullin-2
E: Protein fem-1 homolog C
F: Cullin-2
C: Elongin-B
D: Elongin-C
G: Elongin-B
H: Elongin-C
I: ALA-ARG-ALA-ARG
J: ALA-ARG-ALA-ARG


Theoretical massNumber of molelcules
Total (without water)360,60410
Polymers360,60410
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Protein fem-1 homolog C / FEM1c / FEM1-gamma


Mass: 68767.312 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: FEM1C, KIAA1785 / Production host: Escherichia coli (E. coli) / References: UniProt: Q96JP0
#2: Protein Cullin-2 / CUL-2


Mass: 87068.836 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CUL2 / Production host: Escherichia coli (E. coli) / References: UniProt: Q13617
#3: Protein Elongin-B / EloB / Elongin 18 kDa subunit / RNA polymerase II transcription factor SIII subunit B / SIII p18 / ...EloB / Elongin 18 kDa subunit / RNA polymerase II transcription factor SIII subunit B / SIII p18 / Transcription elongation factor B polypeptide 2


Mass: 13147.781 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOB, TCEB2 / Production host: Escherichia coli (E. coli) / References: UniProt: Q15370
#4: Protein Elongin-C / EloC / Elongin 15 kDa subunit / RNA polymerase II transcription factor SIII subunit C / SIII p15 / ...EloC / Elongin 15 kDa subunit / RNA polymerase II transcription factor SIII subunit C / SIII p15 / Transcription elongation factor B polypeptide 1


Mass: 10843.420 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOC, TCEB1 / Production host: Escherichia coli (E. coli) / References: UniProt: Q15369
#5: Protein/peptide ALA-ARG-ALA-ARG


Mass: 474.558 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: Unknown peptide / Source: (natural) Homo sapiens (human)
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 structure of neddylated CUL2-RBX1-FEM1C-ELOB-ELOC
Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenConc.: 12 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen 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: TFS 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: 56 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.28 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 673233 / Symmetry type: POINT
RefinementHighest resolution: 3.28 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00418282
ELECTRON MICROSCOPYf_angle_d0.69424704
ELECTRON MICROSCOPYf_dihedral_angle_d4.7062434
ELECTRON MICROSCOPYf_chiral_restr0.0442788
ELECTRON MICROSCOPYf_plane_restr0.0063164

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