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- EMDB-12050: Focused map- Cullin scaffold. Ubiquitin ligation to F-box protein... -

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Basic information

Entry
Database: EMDB / ID: EMD-12050
TitleFocused map- Cullin scaffold. Ubiquitin ligation to F-box protein substrates by SCF-RBR E3-E3 super-assembly: CUL1-RBX1-ARIH1 Ariadne. Transition State 1
Map data
Sample
  • Complex: NEDD8-CUL1-RBX1-SKP1-SKP2-CKSHS1-Cyclin A-CDK2-p27-UBE2L3~Ub~ARIH1. Transition State 1 composite map.
    • Complex: Cullin-1, E3 ubiquitin-protein ligase RBX1
      • Protein or peptide: Cullin-1
      • Protein or peptide: E3 ubiquitin-protein ligase RBX1
    • Complex: E3 ubiquitin-protein ligase ARIH1
      • Protein or peptide: E3 ubiquitin-protein ligase ARIH1
  • Ligand: ZINC ION
Keywordsubiquitin / ubiquitin ligase / E3 ligase / F-box protein / RBR ligase / Cullin-RING-Ligase / CRL / SCF / NEDD8 / Post-translational modification / ubiquitylation / LIGASE
Function / homology
Function and homology information


PKR/eIFalpha signaling / ubiquitin-like protein transferase activity / RBR-type E3 ubiquitin transferase / Parkin-FBXW7-Cul1 ubiquitin ligase complex / negative regulation of beige fat cell differentiation / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / cullin-RING ubiquitin ligase complex / Cul7-RING ubiquitin ligase complex / cellular response to chemical stress ...PKR/eIFalpha signaling / ubiquitin-like protein transferase activity / RBR-type E3 ubiquitin transferase / Parkin-FBXW7-Cul1 ubiquitin ligase complex / negative regulation of beige fat cell differentiation / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / 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 / Modulation of host responses by IFN-stimulated genes / ubiquitin conjugating enzyme binding / NEDD8 ligase activity / protein K27-linked ubiquitination / negative regulation of response to oxidative stress / VCB complex / Cul5-RING ubiquitin ligase complex / 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 / RSV-host interactions / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Lewy body / Prolactin receptor signaling / negative regulation of mitophagy / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / cullin family protein binding / protein monoubiquitination / ubiquitin ligase complex / Cajal body / site of DNA damage / signal transduction in response to DNA damage / Nuclear events stimulated by ALK signaling in cancer / protein K48-linked ubiquitination / transcription-coupled nucleotide-excision repair / negative regulation of insulin receptor signaling pathway / regulation of cellular response to insulin stimulus / positive regulation of TORC1 signaling / post-translational protein modification / intrinsic apoptotic signaling pathway / animal organ morphogenesis / T cell activation / Regulation of BACH1 activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / 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 / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of DVL / Degradation of CRY and PER proteins / G1/S transition of mitotic cell cycle / negative regulation of canonical Wnt signaling pathway / Activation of NF-kappaB in B cells / Iron uptake and transport / Degradation of GLI1 by the proteasome / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Recognition of DNA damage by PCNA-containing replication complex / Negative regulation of NOTCH4 signaling / RING-type E3 ubiquitin transferase / Hedgehog 'on' state / PKR-mediated signaling / 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 / NOTCH1 Intracellular Domain Regulates Transcription / Degradation of beta-catenin by the destruction complex / Evasion by RSV of host interferon responses / DNA Damage Recognition in GG-NER / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ISG15 antiviral mechanism / CLEC7A (Dectin-1) signaling / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / Formation of TC-NER Pre-Incision Complex / Regulation of expression of SLITs and ROBOs / Formation of Incision Complex in GG-NER / Interleukin-1 signaling / Orc1 removal from chromatin / protein polyubiquitination / Dual incision in TC-NER / Cyclin D associated events in G1 / Regulation of RAS by GAPs / Gap-filling DNA repair synthesis and ligation in TC-NER
Similarity search - Function
: / E3 ubiquitin-protein ligase ARIH1, UBA-like domain / Ariadne domain / Ariadne domain / E3 ubiquitin ligase RBR family / IBR domain, a half RING-finger domain / IBR domain / IBR domain / In Between Ring fingers / TRIAD supradomain ...: / E3 ubiquitin-protein ligase ARIH1, UBA-like domain / Ariadne domain / Ariadne domain / E3 ubiquitin ligase RBR family / IBR domain, a half RING-finger domain / IBR domain / IBR domain / In Between Ring fingers / TRIAD supradomain / TRIAD supradomain profile. / Zinc finger, RING-H2-type / RING-H2 zinc finger domain / Cullin, N-terminal / Cullin protein neddylation domain / : / Cullin, conserved site / Cullin alpha solenoid domain / Cullin family signature. / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Cullin / : / Cullin alpha+beta domain / Cullin homology domain / Cullin homology domain superfamily / Cullin family profile. / Zinc finger, C3HC4 RING-type / Zinc finger, C3HC4 type (RING finger) / Ring finger / 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-1 / E3 ubiquitin-protein ligase ARIH1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.6 Å
AuthorsHorn-Ghetko D / Prabu JR / Schulman BA
Funding support Germany, 2 items
OrganizationGrant numberCountry
European Research Council (ERC)H2020 789016-NEDD8Activate Germany
German Research Foundation (DFG)SCHU 3196/1-1 Germany
CitationJournal: Nature / Year: 2021
Title: Ubiquitin ligation to F-box protein targets by SCF-RBR E3-E3 super-assembly.
Authors: Daniel Horn-Ghetko / David T Krist / J Rajan Prabu / Kheewoong Baek / Monique P C Mulder / Maren Klügel / Daniel C Scott / Huib Ovaa / Gary Kleiger / Brenda A Schulman /
Abstract: E3 ligases are typically classified by hallmark domains such as RING and RBR, which are thought to specify unique catalytic mechanisms of ubiquitin transfer to recruited substrates. However, rather ...E3 ligases are typically classified by hallmark domains such as RING and RBR, which are thought to specify unique catalytic mechanisms of ubiquitin transfer to recruited substrates. However, rather than functioning individually, many neddylated cullin-RING E3 ligases (CRLs) and RBR-type E3 ligases in the ARIH family-which together account for nearly half of all ubiquitin ligases in humans-form E3-E3 super-assemblies. Here, by studying CRLs in the SKP1-CUL1-F-box (SCF) family, we show how neddylated SCF ligases and ARIH1 (an RBR-type E3 ligase) co-evolved to ubiquitylate diverse substrates presented on various F-box proteins. We developed activity-based chemical probes that enabled cryo-electron microscopy visualization of steps in E3-E3 ubiquitylation, initiating with ubiquitin linked to the E2 enzyme UBE2L3, then transferred to the catalytic cysteine of ARIH1, and culminating in ubiquitin linkage to a substrate bound to the SCF E3 ligase. The E3-E3 mechanism places the ubiquitin-linked active site of ARIH1 adjacent to substrates bound to F-box proteins (for example, substrates with folded structures or limited length) that are incompatible with previously described conventional RING E3-only mechanisms. The versatile E3-E3 super-assembly may therefore underlie widespread ubiquitylation.
History
DepositionDec 7, 2020-
Header (metadata) releaseFeb 10, 2021-
Map releaseFeb 10, 2021-
UpdateJul 9, 2025-
Current statusJul 9, 2025Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0221
  • Imaged by UCSF Chimera
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  • Surface view colored by radius
  • Surface level: 0.0221
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7b5s
  • Surface level: 0.0221
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7b5s
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_12050.png

Downloads & links

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Map

FileDownload / File: emd_12050.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.09 Å/pix.
x 320 pix.
= 348.8 Å		1.09 Å/pix.
x 320 pix.
= 348.8 Å		1.09 Å/pix.
x 320 pix.
= 348.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.09 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0221 / Movie #1: 0.0221
Minimum - Maximum-0.09177531 - 0.16662394
Average (Standard dev.)0.000103918246 (±0.0022229615)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 348.80002 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.091.091.09
M x/y/z320320320
origin x/y/z0.0000.0000.000
length x/y/z348.800348.800348.800
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ320320320
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS320320320
D min/max/mean-0.0920.1670.000

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Supplemental data

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Mask #1

Fileemd_12050_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_12050_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_12050_half_map_2.map
Projections & Slices
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Sample components

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Entire : NEDD8-CUL1-RBX1-SKP1-SKP2-CKSHS1-Cyclin A-CDK2-p27-UBE2L3~Ub~ARIH...

EntireName: NEDD8-CUL1-RBX1-SKP1-SKP2-CKSHS1-Cyclin A-CDK2-p27-UBE2L3~Ub~ARIH1. Transition State 1 composite map.
Components
  • Complex: NEDD8-CUL1-RBX1-SKP1-SKP2-CKSHS1-Cyclin A-CDK2-p27-UBE2L3~Ub~ARIH1. Transition State 1 composite map.
    • Complex: Cullin-1, E3 ubiquitin-protein ligase RBX1
      • Protein or peptide: Cullin-1
      • Protein or peptide: E3 ubiquitin-protein ligase RBX1
    • Complex: E3 ubiquitin-protein ligase ARIH1
      • Protein or peptide: E3 ubiquitin-protein ligase ARIH1
  • Ligand: ZINC ION

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Supramolecule #1: NEDD8-CUL1-RBX1-SKP1-SKP2-CKSHS1-Cyclin A-CDK2-p27-UBE2L3~Ub~ARIH...

SupramoleculeName: NEDD8-CUL1-RBX1-SKP1-SKP2-CKSHS1-Cyclin A-CDK2-p27-UBE2L3~Ub~ARIH1. Transition State 1 composite map.
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Molecular weightTheoretical: 300 KDa

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Supramolecule #2: Cullin-1, E3 ubiquitin-protein ligase RBX1

SupramoleculeName: Cullin-1, E3 ubiquitin-protein ligase RBX1 / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1, #3
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: E3 ubiquitin-protein ligase ARIH1

SupramoleculeName: E3 ubiquitin-protein ligase ARIH1 / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Cullin-1

MacromoleculeName: Cullin-1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 89.800367 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MSSTRSQNPH GLKQIGLDQI WDDLRAGIQQ VYTRQSMAKS RYMELYTHVY NYCTSVHQSN QARGAGVPPS KSKKGQTPGG AQFVGLELY KRLKEFLKNY LTNLLKDGED LMDESVLKFY TQQWEDYRFS SKVLNGICAY LNRHWVRREC DEGRKGIYEI Y SLALVTWR ...String:
MSSTRSQNPH GLKQIGLDQI WDDLRAGIQQ VYTRQSMAKS RYMELYTHVY NYCTSVHQSN QARGAGVPPS KSKKGQTPGG AQFVGLELY KRLKEFLKNY LTNLLKDGED LMDESVLKFY TQQWEDYRFS SKVLNGICAY LNRHWVRREC DEGRKGIYEI Y SLALVTWR DCLFRPLNKQ VTNAVLKLIE KERNGETINT RLISGVVQSY VELGLNEDDA FAKGPTLTVY KESFESQFLA DT ERFYTRE STEFLQQNPV TEYMKKAEAR LLEEQRRVQV YLHESTQDEL ARKCEQVLIE KHLEIFHTEF QNLLDADKNE DLG RMYNLV SRIQDGLGEL KKLLETHIHN QGLAAIEKCG EAALNDPKMY VQTVLDVHKK YNALVMSAFN NDAGFVAALD KACG RFINN NAVTKMAQSS SKSPELLARY CDSLLKKSSK NPEEAELEDT LNQVMVVFKY IEDKDVFQKF YAKMLAKRLV HQNSA SDDA EASMISKLKQ ACGFEYTSKL QRMFQDIGVS KDLNEQFKKH LTNSEPLDLD FSIQVLSSGS WPFQQSCTFA LPSELE RSY QRFTAFYASR HSGRKLTWLY QLSKGELVTN CFKNRYTLQA STFQMAILLQ YNTEDAYTVQ QLTDSTQIKM DILAQVL QI LLKSKLLVLE DENANVDEVE LKPDTLIKLY LGYKNKKLRV NINVPMKTEQ KQEQETTHKN IEEDRKLLIQ AAIVRIMK M RKVLKHQQLL GEVLTQLSSR FKPRVPVIKK CIDILIEKEY LERVDGEKDT YSYLA

UniProtKB: Cullin-1

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Macromolecule #2: E3 ubiquitin-protein ligase ARIH1

MacromoleculeName: E3 ubiquitin-protein ligase ARIH1 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO / EC number: RBR-type E3 ubiquitin transferase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 64.197777 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MDSDEGYNYE FDEDEECSEE DSGAEEEEDE DDDEPDDDTL DLGEVELVEP GLGVGGERDG LLCGETGGGG GSALGPGGGG GGGGGGGGG GPGHEQEEDY RYEVLTAEQI LQHMVECIRE VNEVIQNPAT ITRILLSHFN WDKEKLMERY FDGNLEKLFA E CHVINPSK ...String:
MDSDEGYNYE FDEDEECSEE DSGAEEEEDE DDDEPDDDTL DLGEVELVEP GLGVGGERDG LLCGETGGGG GSALGPGGGG GGGGGGGGG GPGHEQEEDY RYEVLTAEQI LQHMVECIRE VNEVIQNPAT ITRILLSHFN WDKEKLMERY FDGNLEKLFA E CHVINPSK KSRTRQMNTR SSAQDMPCQI CYLNYPNSYF TGLECGHKFC MQCWSEYLTT KIMEEGMGQT ISCPAHGCDI LV DDNTVMR LITDSKVKLK YQHLITNSFV ECNRLLKWCP APDCHHVVKV QYPDAKPVRC KCGRQFCFNC GENWHDPVKC KWL KKWIKK CDDDSETSNW IAANTKECPK CHVTIEKDGG CNHMVCRNQN CKAEFCWVCL GPWEPHGSAW YNCNRYNEDD AKAA RDAQE RSRAALQRYL FYCNRYMNHM QSLRFEHKLY AQVKQKMEEM QQHNMSWIEV QFLKKAVDVL CQCRATLMYT YVFAF YLKK NNQSIIFENN QADLENATEV LSGYLERDIS QDSLQDIKQK VQDKYRYCES RRRVLLQHVH EGYEKDLWEY IED

UniProtKB: E3 ubiquitin-protein ligase ARIH1

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Macromolecule #3: E3 ubiquitin-protein ligase RBX1

MacromoleculeName: E3 ubiquitin-protein ligase RBX1 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: RING-type E3 ubiquitin transferase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 12.289977 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MAAAMDVDTP SGTNSGAGKK RFEVKKWNAV ALWAWDIVVD NCAICRNHIM DLCIECQANQ ASATSEECTV AWGVCNHAFH FHCISRWLK TRQVCPLDNR EWEFQKYGH

UniProtKB: E3 ubiquitin-protein ligase RBX1

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Macromolecule #4: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 4 / Number of copies: 5 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: EMDB MAP
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 623409
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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