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- EMDB-34452: Cryo-EM Structure of the KBTBD2-CUL3-Rbx1-p85a dimeric complex -

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Basic information

Entry
Database: EMDB / ID: EMD-34452
TitleCryo-EM Structure of the KBTBD2-CUL3-Rbx1-p85a dimeric complex
Map data
Sample
  • Complex: KBTBD2-CUL3-Rbx1-p85a dimeric complex
    • Protein or peptide: E3 ubiquitin-protein ligase RBX1
    • Protein or peptide: Kelch repeat and BTB domain-containing protein 2
    • Protein or peptide: Phosphatidylinositol 3-kinase regulatory subunit alpha
    • 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 / perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / nuclear protein quality control by the ubiquitin-proteasome system / polar microtubule / regulation protein catabolic process at postsynapse / COPII vesicle coating ...positive regulation of mitotic cell cycle phase transition / trophectodermal cellular morphogenesis / liver morphogenesis / POZ domain binding / perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / nuclear protein quality control by the ubiquitin-proteasome system / polar microtubule / regulation protein catabolic process at postsynapse / COPII vesicle coating / anaphase-promoting complex-dependent catabolic process / phosphatidylinositol kinase activity / positive regulation of focal adhesion disassembly / 1-phosphatidylinositol-3-kinase regulator activity / phosphatidylinositol 3-kinase regulator activity / IRS-mediated signalling / positive regulation of endoplasmic reticulum unfolded protein response / phosphatidylinositol 3-kinase activator activity / interleukin-18-mediated signaling pathway / T follicular helper cell differentiation / phosphatidylinositol 3-kinase complex / PI3K events in ERBB4 signaling / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / phosphatidylinositol 3-kinase regulatory subunit binding / myeloid leukocyte migration / cullin-RING ubiquitin ligase complex / neurotrophin TRKA receptor binding / RHOBTB3 ATPase cycle / positive regulation of mitotic metaphase/anaphase transition / embryonic cleavage / Activated NTRK2 signals through PI3K / cellular response to chemical stress / Cul7-RING ubiquitin ligase complex / cis-Golgi network / ubiquitin-dependent protein catabolic process via the C-end degron rule pathway / Activated NTRK3 signals through PI3K / transmembrane receptor protein tyrosine kinase adaptor activity / cell projection organization / ErbB-3 class receptor binding / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / positive regulation of protein autoubiquitination / RHOD GTPase cycle / RNA polymerase II transcription initiation surveillance / protein neddylation / phosphatidylinositol 3-kinase complex, class IA / Nephrin family interactions / RHOF GTPase cycle / kinase activator activity / Notch binding / Signaling by LTK in cancer / NEDD8 ligase activity / fibroblast apoptotic process / positive regulation of leukocyte migration / Signaling by LTK / MET activates PI3K/AKT signaling / VCB complex / RHOBTB1 GTPase cycle / PI3K/AKT activation / negative regulation of stress fiber assembly / RND1 GTPase cycle / positive regulation of filopodium assembly / negative regulation of response to oxidative stress / RND2 GTPase cycle / Cul5-RING ubiquitin ligase complex / RND3 GTPase cycle / growth hormone receptor signaling pathway / insulin binding / SCF ubiquitin ligase complex / negative regulation of type I interferon production / Cul2-RING ubiquitin ligase complex / Signaling by ALK / stem cell division / ubiquitin-ubiquitin ligase activity / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / PI-3K cascade:FGFR3 / RHOV GTPase cycle / Cul4A-RING E3 ubiquitin ligase complex / RHOB GTPase cycle / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / Cul4-RING E3 ubiquitin ligase complex / mitotic metaphase chromosome alignment / Cul3-RING ubiquitin ligase complex / natural killer cell mediated cytotoxicity / GP1b-IX-V activation signalling / PI-3K cascade:FGFR2 / Cul4B-RING E3 ubiquitin ligase complex / stress fiber assembly / PI-3K cascade:FGFR4 / ubiquitin ligase complex scaffold activity / negative regulation of Rho protein signal transduction / negative regulation of mitophagy / PI-3K cascade:FGFR1 / Prolactin receptor signaling / positive regulation of cytokinesis / RHOC GTPase cycle / RHOJ GTPase cycle / intracellular glucose homeostasis
Similarity search - Function
Kelch repeat and BTB domain-containing protein 2 / : / Phosphatidylinositol 3-kinase regulatory subunit alpha, SH3 domain / PIK3R1, inter-SH2 domain / PI3K p85 subunit, C-terminal SH2 domain / PI3K regulatory subunit p85-related , inter-SH2 domain / PI3K p85 subunit, N-terminal SH2 domain / Phosphatidylinositol 3-kinase regulatory subunit P85 inter-SH2 domain / Zinc finger, RING-H2-type / RING-H2 zinc finger domain ...Kelch repeat and BTB domain-containing protein 2 / : / Phosphatidylinositol 3-kinase regulatory subunit alpha, SH3 domain / PIK3R1, inter-SH2 domain / PI3K p85 subunit, C-terminal SH2 domain / PI3K regulatory subunit p85-related , inter-SH2 domain / PI3K p85 subunit, N-terminal SH2 domain / Phosphatidylinositol 3-kinase regulatory subunit P85 inter-SH2 domain / Zinc finger, RING-H2-type / RING-H2 zinc finger domain / BTB-kelch protein / Cullin protein neddylation domain / : / BTB/Kelch-associated / BTB And C-terminal Kelch / BTB And C-terminal Kelch / Cullin, conserved site / Cullin family signature. / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Rho GTPase-activating protein domain / RhoGAP domain / Kelch motif / Rho GTPase-activating proteins domain profile. / GTPase-activator protein for Rho-like GTPases / Kelch / Kelch repeat type 1 / Cullin / Cullin, N-terminal / Cullin homology domain / Cullin homology domain superfamily / Cullin alpha solenoid domain / Cullin family profile. / Rho GTPase activation protein / 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 / SH2 domain / Src homology 2 (SH2) domain profile. / Src homology 2 domains / Zinc finger RING-type profile. / SH2 domain / Zinc finger, RING-type / Src homology 3 domains / SH2 domain superfamily / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / Zinc finger, RING/FYVE/PHD-type / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
Phosphatidylinositol 3-kinase regulatory subunit alpha / 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: 4.6 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 8, 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_34452.png

Downloads & links

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Map

FileDownload / File: emd_34452.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
1.33 Å/pix.
x 384 pix.
= 511.488 Å		1.33 Å/pix.
x 384 pix.
= 511.488 Å		1.33 Å/pix.
x 384 pix.
= 511.488 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.332 Å
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Histogram (log scale)
Contour LevelBy AUTHOR: 0.001
Minimum - Maximum-0.0017728873 - 1.8945361
Average (Standard dev.)0.0005839851 (±0.017095936)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 511.488 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: #3

Fileemd_34452_additional_1.map
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Additional map: #2

Fileemd_34452_additional_2.map
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Additional map: #1

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Half map: #2

Fileemd_34452_half_map_1.map
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Half map: #1

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Sample components

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Entire : KBTBD2-CUL3-Rbx1-p85a dimeric complex

EntireName: KBTBD2-CUL3-Rbx1-p85a dimeric complex
Components
  • Complex: KBTBD2-CUL3-Rbx1-p85a dimeric complex
    • Protein or peptide: E3 ubiquitin-protein ligase RBX1
    • Protein or peptide: Kelch repeat and BTB domain-containing protein 2
    • Protein or peptide: Phosphatidylinositol 3-kinase regulatory subunit alpha
    • Protein or peptide: Cullin-3
  • Ligand: ZINC ION

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Supramolecule #1: KBTBD2-CUL3-Rbx1-p85a dimeric complex

SupramoleculeName: KBTBD2-CUL3-Rbx1-p85a dimeric complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: E3 ubiquitin-protein ligase RBX1

MacromoleculeName: E3 ubiquitin-protein ligase RBX1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO / EC number: RING-type E3 ubiquitin transferase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 12.289977 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString:
MAAAMDVDTP SGTNSGAGKK RFEVKKWNAV ALWAWDIVVD NCAICRNHIM DLCIECQANQ ASATSEECTV AWGVCNHAFH FHCISRWLK TRQVCPLDNR EWEFQKYGH

UniProtKB: E3 ubiquitin-protein ligase RBX1

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

MacromoleculeName: Kelch repeat and BTB domain-containing protein 2 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 71.431375 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 GLYKDMPKFF 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 #3: Phosphatidylinositol 3-kinase regulatory subunit alpha

MacromoleculeName: Phosphatidylinositol 3-kinase regulatory subunit alpha
type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 83.710281 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSAEGYQYRA LYDYKKEREE DIDLHLGDIL TVNKGSLVAL GFSDGQEARP EEIGWLNGYN ETTGERGDFP GTYVEYIGRK KISPPTPKP RPPRPLPVAP GSSKTEADVE QQALTLPDLA EQFAPPDIAP PLLIKLVEAI EKKGLECSTL YRTQSSSNLA E LRQLLDCD ...String:
MSAEGYQYRA LYDYKKEREE DIDLHLGDIL TVNKGSLVAL GFSDGQEARP EEIGWLNGYN ETTGERGDFP GTYVEYIGRK KISPPTPKP RPPRPLPVAP GSSKTEADVE QQALTLPDLA EQFAPPDIAP PLLIKLVEAI EKKGLECSTL YRTQSSSNLA E LRQLLDCD TPSVDLEMID VHVLADAFKR YLLDLPNPVI PAAVYSEMIS LAPEVQSSEE YIQLLKKLIR SPSIPHQYWL TL QYLLKHF FKLSQTSSKN LLNARVLSEI FSPMLFRFSA ASSDNTENLI KVIEILISTE WNERQPAPAL PPKPPKPTTV ANN GMNNNM SLQDAEWYWG DISREEVNEK LRDTADGTFL VRDASTKMHG DYTLTLRKGG NNKLIKIFHR DGKYGFSDPL TFSS VVELI NHYRNESLAQ YNPKLDVKLL YPVSKYQQDQ VVKEDNIEAV GKKLHEYNTQ FQEKSREYDR LYEEYTRTSQ EIQMK RTAI EAFNETIKIF EEQCQTQERY SKEYIEKFKR EGNEKEIQRI MHNYDKLKSR ISEIIDSRRR LEEDLKKQAA EYREID KRM NSIKPDLIQL RKTRDQYLMW LTQKGVRQKK LNEWLGNENT EDQYSLVEDD EDLPHHDEKT WNVGSSNRNK AENLLRG KR DGTFLVRESS KQGCYACSVV VDGEVKHCVI NKTATGYGFA EPYNLYSSLK ELVLHYQHTS LVQHNDSLNV TLAYPVYA Q QRR

UniProtKB: Phosphatidylinositol 3-kinase regulatory subunit alpha

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Macromolecule #4: Cullin-3

MacromoleculeName: Cullin-3 / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 89.063328 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MSNLSKGTGS RKDTKMRIRA FPMTMDEKYV NSIWDLLKNA IQEIQRKNNS GLSFEELYRN AYTMVLHKHG EKLYTGLREV VTEHLINKV REDVLNSLNN NFLQTLNQAW NDHQTAMVMI RDILMYMDRV YVQQNNVENV YNLGLIIFRD QVVRYGCIRD H LRQTLLDM ...String:
MSNLSKGTGS RKDTKMRIRA FPMTMDEKYV NSIWDLLKNA IQEIQRKNNS GLSFEELYRN AYTMVLHKHG EKLYTGLREV VTEHLINKV REDVLNSLNN NFLQTLNQAW NDHQTAMVMI RDILMYMDRV YVQQNNVENV YNLGLIIFRD QVVRYGCIRD H LRQTLLDM IARERKGEVV DRGAIRNACQ MLMILGLEGR SVYEEDFEAP FLEMSAEFFQ MESQKFLAEN SASVYIKKVE AR INEEIER VMHCLDKSTE EPIVKVVERE LISKHMKTIV EMENSGLVHM LKNGKTEDLG CMYKLFSRVP NGLKTMCECM SSY LREQGK ALVSEEGEGK NPVDYIQGLL DLKSRFDRFL LESFNNDRLF KQTIAGDFEY FLNLNSRSPE YLSLFIDDKL KKGV KGLTE QEVETILDKA MVLFRFMQEK DVFERYYKQH LARRLLTNKS VSDDSEKNMI SKLKTECGCQ FTSKLEGMFR DMSIS NTTM DEFRQHLQAT GVSLGGVDLT VRVLTTGYWP TQSATPKCNI PPAPRHAFEI FRRFYLAKHS GRQLTLQHHM GSADLN ATF YGPVKKEDGS EVGVGGAQVT GSNTRKHILQ VSTFQMTILM LFNNREKYTF EEIQQETDIP ERELVRALQS LACGKPT QR VLTKEPKSKE IENGHIFTVN DQFTSKLHRV KIQTVAAKQG ESDPERKETR QKVDDDRKHE IEAAIVRIMK SRKKMQHN V LVAEVTQQLK ARFLPSPVVI KKRIEGLIER EYLARTPEDR KVYTYVA

UniProtKB: Cullin-3

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Macromolecule #5: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 5 / Number of copies: 6 / 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:

4ovu


Details: 7CIO
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number images used: 333476
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING

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