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- EMDB-34449: Cryo-EM Structure of the KBTBD2-Cul3-Rbx1 tetrameric complex -

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Basic information

Entry
Database: EMDB / ID: EMD-34449
TitleCryo-EM Structure of the KBTBD2-Cul3-Rbx1 tetrameric complex
Map data
Sample
  • Complex: KBTBD2-Cul3-Rbx1 tetrameric complex
    • Protein or peptide: Kelch repeat and BTB domain-containing protein 2
    • Protein or peptide: E3 ubiquitin-protein ligase RBX1
    • Protein or peptide: Cullin-3
  • Ligand: ZINC ION
Keywordsligase / complex
Function / homology
Function and homology information


positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / nuclear protein quality control by the ubiquitin-proteasome system / polar microtubule / COPII vesicle coating / anaphase-promoting complex-dependent catabolic process / embryonic cleavage / regulation protein catabolic process at postsynapse ...positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / nuclear protein quality control by the ubiquitin-proteasome system / polar microtubule / COPII vesicle coating / anaphase-promoting complex-dependent catabolic process / embryonic cleavage / regulation protein catabolic process at postsynapse / cullin-RING-type E3 NEDD8 transferase / RHOBTB3 ATPase cycle / NEDD8 transferase activity / cell projection organization / cullin-RING ubiquitin ligase complex / positive regulation of mitotic metaphase/anaphase transition / 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 / Notch binding / NEDD8 ligase activity / fibroblast apoptotic process / RHOBTB1 GTPase cycle / negative regulation of response to oxidative stress / Cul5-RING ubiquitin ligase complex / SCF ubiquitin ligase complex / 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 / stress fiber assembly / negative regulation of Rho protein signal transduction / Prolactin receptor signaling / positive regulation of cytokinesis / cullin family protein binding / sperm flagellum / 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 / gastrulation / phosphatidylinositol 3-kinase/protein kinase B signal transduction / positive regulation of TORC1 signaling / regulation of cellular response to insulin stimulus / post-translational protein modification / intrinsic apoptotic signaling pathway / cyclin binding / Regulation of BACH1 activity / positive regulation of protein ubiquitination / T cell activation / kidney development / integrin-mediated signaling pathway / Degradation of DVL / response to insulin / cellular response to amino acid stimulus / Degradation of GLI1 by the proteasome / Negative regulation of NOTCH4 signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Recognition of DNA damage by PCNA-containing replication complex / Vif-mediated degradation of APOBEC3G / Hedgehog 'on' state / negative regulation of canonical Wnt signaling pathway / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / DNA Damage Recognition in GG-NER / Degradation of beta-catenin by the destruction complex / protein destabilization / RING-type E3 ubiquitin transferase / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / lipid metabolic process / Evasion by RSV of host interferon responses / Wnt signaling pathway / Dual Incision in GG-NER / Transcription-Coupled Nucleotide Excision Repair (TC-NER) / NOTCH1 Intracellular Domain Regulates Transcription / Formation of TC-NER Pre-Incision Complex / mitotic spindle / Regulation of expression of SLITs and ROBOs / spindle pole / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / Formation of Incision Complex in GG-NER / G1/S transition of mitotic cell cycle / Interleukin-1 signaling / Orc1 removal from chromatin / glucose metabolic process / Regulation of RAS by GAPs
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 / Cullin protein neddylation domain / Kelch ...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 / Cullin protein neddylation domain / Kelch / : / Cullin, conserved site / Cullin family signature. / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Kelch motif / Kelch repeat type 1 / Cullin / Cullin, N-terminal / Cullin homology domain / Cullin homology domain superfamily / Cullin family / 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)
Methodsingle particle reconstruction / cryo EM / Resolution: 7.86 Å
AuthorsHu Y / Mao Q / Chen Z / Sun L
Funding support China, 1 items
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, 2022-
Header (metadata) releaseOct 11, 2023-
Map releaseOct 11, 2023-
UpdateMar 20, 2024-
Current statusMar 20, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_34449.png

Downloads & links

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Map

FileDownload / File: emd_34449.map.gz / Format: CCP4 / Size: 27 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
2.66 Å/pix.
x 192 pix.
= 511.488 Å		2.66 Å/pix.
x 192 pix.
= 511.488 Å		2.66 Å/pix.
x 192 pix.
= 511.488 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 2.664 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0001
Minimum - Maximum-0.0013889093 - 1.5899543
Average (Standard dev.)0.0018313251 (±0.026927242)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions192192192
Spacing192192192
CellA=B=C: 511.488 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_34449_half_map_1.map
Projections & Slices
AxesZYX

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Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_34449_half_map_2.map
Projections & Slices
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Histogram (log scale)

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Sample components

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Entire : KBTBD2-Cul3-Rbx1 tetrameric complex

EntireName: KBTBD2-Cul3-Rbx1 tetrameric complex
Components
  • Complex: KBTBD2-Cul3-Rbx1 tetrameric complex
    • Protein or peptide: Kelch repeat and BTB domain-containing protein 2
    • Protein or peptide: E3 ubiquitin-protein ligase RBX1
    • Protein or peptide: Cullin-3
  • Ligand: ZINC ION

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Supramolecule #1: KBTBD2-Cul3-Rbx1 tetrameric complex

SupramoleculeName: KBTBD2-Cul3-Rbx1 tetrameric complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Kelch repeat and BTB domain-containing protein 2

MacromoleculeName: Kelch repeat and BTB domain-containing protein 2 / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 71.403367 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSTQDERQIN TEYAVSLLEQ LKLFYEQQLF TDIVLIVEGT EFPCHKMVLA TCSSYFRAMF MSGLSESKQT HVHLRNVDAA TLQIIITYA YTGNLAMNDS TVEQLYETAC FLQVEDVLQR CREYLIKKIN AENCVRLLSF ADLFSCEELK QSAKRMVEHK F TAVYHQDA ...String:
MSTQDERQIN TEYAVSLLEQ LKLFYEQQLF TDIVLIVEGT EFPCHKMVLA TCSSYFRAMF MSGLSESKQT HVHLRNVDAA TLQIIITYA YTGNLAMNDS TVEQLYETAC FLQVEDVLQR CREYLIKKIN AENCVRLLSF ADLFSCEELK QSAKRMVEHK F TAVYHQDA FMQLSHDLLI DILSSDNLNV EKEETVREAA MLWLEYNTES RSQYLSSVLS QIRIDALSEV TQRAWFQGLP PN DKSVVVQ GLYKSMPKFF KPRLGMTKEE MMIFIEASSE NPCSLYSSVC YSPQAEKVYK LCSPPADLHK VGTVVTPDND IYI AGGQVP LKNTKTNHSK TSKLQTAFRT VNCFYWFDAQ QNTWFPKTPM LFVRIKPSLV CCEGYIYAIG GDSVGGELNR RTVE RYDTE KDEWTMVSPL PCAWQWSAAV VVHDCIYVMT LNLMYCYFPR SDSWVEMAMR QTSRSFASAA AFGDKIFYIG GLHIA TNSG IRLPSGTVDG SSVTVEIYDV NKNEWKMAAN IPAKRYSDPC VRAVVISNSL CVFMRETHLN ERAKYVTYQY DLELDR WSL RQHISERVLW DLGRDFRCTV GKLYPSCLEE SPWKPPTYLF STDGTEEFEL DGEMVALPPV

UniProtKB: Kelch repeat and BTB domain-containing protein 2

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Macromolecule #2: E3 ubiquitin-protein ligase RBX1

MacromoleculeName: E3 ubiquitin-protein ligase RBX1 / type: protein_or_peptide / ID: 2 / Number of copies: 4 / Enantiomer: LEVO / EC number: RING-type E3 ubiquitin transferase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.970756 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
HHHHHHENLY FQGMAAAMDV DTPSGTNSGA GKKRFEVKKW NAVALWAWDI VVDNCAICRN HIMDLCIECQ ANQASATSEE CTVAWGVCN HAFHFHCISR WLKTRQVCPL DNREWEFQKY GH

UniProtKB: E3 ubiquitin-protein ligase RBX1

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Macromolecule #3: Cullin-3

MacromoleculeName: Cullin-3 / type: protein_or_peptide / ID: 3 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 90.105469 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: WSHPQFEKMS NLSKGTGSRK DTKMRIRAFP MTMDEKYVNS IWDLLKNAIQ EIQRKNNSGL SFEELYRNAY TMVLHKHGEK LYTGLREVV TEHLINKVRE DVLNSLNNNF LQTLNQAWND HQTAMVMIRD ILMYMDRVYV QQNNVENVYN LGLIIFRDQV V RYGCIRDH ...String:
WSHPQFEKMS NLSKGTGSRK DTKMRIRAFP MTMDEKYVNS IWDLLKNAIQ EIQRKNNSGL SFEELYRNAY TMVLHKHGEK LYTGLREVV TEHLINKVRE DVLNSLNNNF LQTLNQAWND HQTAMVMIRD ILMYMDRVYV QQNNVENVYN LGLIIFRDQV V RYGCIRDH LRQTLLDMIA RERKGEVVDR GAIRNACQML MILGLEGRSV YEEDFEAPFL EMSAEFFQME SQKFLAENSA SV YIKKVEA RINEEIERVM HCLDKSTEEP IVKVVERELI SKHMKTIVEM ENSGLVHMLK NGKTEDLGCM YKLFSRVPNG LKT MCECMS SYLREQGKAL VSEEGEGKNP VDYIQGLLDL KSRFDRFLLE SFNNDRLFKQ TIAGDFEYFL NLNSRSPEYL SLFI DDKLK KGVKGLTEQE VETILDKAMV LFRFMQEKDV FERYYKQHLA RRLLTNKSVS DDSEKNMISK LKTECGCQFT SKLEG MFRD MSISNTTMDE FRQHLQATGV SLGGVDLTVR VLTTGYWPTQ SATPKCNIPP APRHAFEIFR RFYLAKHSGR QLTLQH HMG SADLNATFYG PVKKEDGSEV GVGGAQVTGS NTRKHILQVS TFQMTILMLF NNREKYTFEE IQQETDIPER ELVRALQ SL ACGKPTQRVL TKEPKSKEIE NGHIFTVNDQ FTSKLHRVKI QTVAAKQGES DPERKETRQK VDDDRKHEIE AAIVRIMK S RKKMQHNVLV AEVTQQLKAR FLPSPVVIKK RIEGLIEREY LARTPEDRKV YTYVA

UniProtKB: Cullin-3

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Macromolecule #4: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 4 / Number of copies: 12 / 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 K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 45.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination 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 modelType of model: PDB ENTRY
PDB model - PDB ID:

6i2m


Details: 4A0K
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 7.86 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 50236
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION (ver. 3.0)

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