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- EMDB-42051: Cryo-EM Structure of SCF-FBOX22-BACH1BTB -

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Entry
Database: EMDB / ID: EMD-42051
TitleCryo-EM Structure of SCF-FBOX22-BACH1BTB
Map dataThe overall EM map of SCF-FBXO22-BACH1BTB complex from Non uniform refinement in cryoSPARC
Sample
  • Complex: FBXO22-BACH1BTB
    • Protein or peptide: F-box only protein 22
    • Protein or peptide: Transcription regulator protein BACH1
  • Protein or peptide: S-phase kinase-associated protein 1
  • Protein or peptide: Cullin-1
KeywordsF-box protein / FBXO22 / BACH1 / LIGASE
Function / homology
Function and homology information


regulation of skeletal muscle fiber development / Regulation of HMOX1 expression and activity / Parkin-FBXW7-Cul1 ubiquitin ligase complex / F-box domain binding / PcG protein complex / ligand-modulated transcription factor activity / cullin-RING ubiquitin ligase complex / positive regulation of ubiquitin protein ligase activity / Cul7-RING ubiquitin ligase complex / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling ...regulation of skeletal muscle fiber development / Regulation of HMOX1 expression and activity / Parkin-FBXW7-Cul1 ubiquitin ligase complex / F-box domain binding / PcG protein complex / ligand-modulated transcription factor activity / cullin-RING ubiquitin ligase complex / positive regulation of ubiquitin protein ligase activity / Cul7-RING ubiquitin ligase complex / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / maintenance of protein location in nucleus / nucleocytoplasmic transport / regulation of metabolic process / SCF ubiquitin ligase complex / NFE2L2 regulating anti-oxidant/detoxification enzymes / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / ubiquitin ligase complex scaffold activity / Prolactin receptor signaling / cullin family protein binding / protein monoubiquitination / ubiquitin-like ligase-substrate adaptor activity / protein K48-linked ubiquitination / Nuclear events stimulated by ALK signaling in cancer / intrinsic apoptotic signaling pathway / Regulation of BACH1 activity / molecular function activator activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / cellular response to starvation / animal organ morphogenesis / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Vpu mediated degradation of CD4 / Dectin-1 mediated noncanonical NF-kB signaling / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / Iron uptake and transport / Heme signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / G1/S transition of mitotic cell cycle / 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 / Degradation of beta-catenin by the destruction complex / beta-catenin binding / NOTCH1 Intracellular Domain Regulates Transcription / protein modification process / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / DNA-binding transcription repressor activity, RNA polymerase II-specific / Constitutive Signaling by NOTCH1 PEST Domain Mutants / Constitutive Signaling by NOTCH1 HD+PEST Domain Mutants / FCERI mediated NF-kB activation / RNA polymerase II transcription regulator complex / Z disc / Interleukin-1 signaling / Orc1 removal from chromatin / protein polyubiquitination / Regulation of RUNX2 expression and activity / ubiquitin-protein transferase activity / Cyclin D associated events in G1 / : / Regulation of PLK1 Activity at G2/M Transition / Downstream TCR signaling / Antigen processing: Ubiquitination & Proteasome degradation / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / Neddylation / DNA-binding transcription activator activity, RNA polymerase II-specific / ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / proteasome-mediated ubiquitin-dependent protein catabolic process / DNA-binding transcription factor activity, RNA polymerase II-specific / cell population proliferation / positive regulation of canonical NF-kappaB signal transduction / protein ubiquitination / RNA polymerase II cis-regulatory region sequence-specific DNA binding / chromatin remodeling / DNA-binding transcription factor activity / protein domain specific binding / DNA repair / heme binding / ubiquitin protein ligase binding / centrosome / regulation of DNA-templated transcription / regulation of transcription by RNA polymerase II / chromatin / negative regulation of transcription by RNA polymerase II / nucleoplasm / nucleus / plasma membrane / cytoplasm / cytosol
Similarity search - Function
FIST, C-domain / FIST C domain / FIST_C / BACH, basic leucine zipper (bZIP) domain / F-box domain / Basic leucine zipper domain, Maf-type / bZIP Maf transcription factor / Transcription factor, Skn-1-like, DNA-binding domain superfamily / : / F-box-like domain superfamily ...FIST, C-domain / FIST C domain / FIST_C / BACH, basic leucine zipper (bZIP) domain / F-box domain / Basic leucine zipper domain, Maf-type / bZIP Maf transcription factor / Transcription factor, Skn-1-like, DNA-binding domain superfamily / : / 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 / Cullin protein neddylation domain / Cullin, conserved site / Cullin family signature. / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Basic-leucine zipper (bZIP) domain signature. / Basic-leucine zipper (bZIP) domain profile. / basic region leucin zipper / Cullin / Basic-leucine zipper domain / Cullin, N-terminal / Cullin homology domain / Cullin homology domain superfamily / Cullin alpha solenoid domain / Cullin family profile. / Basic-leucine zipper domain superfamily / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / BTB/POZ domain / BTB domain profile. / Broad-Complex, Tramtrack and Bric a brac / BTB/POZ domain / SKP1/BTB/POZ domain superfamily / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily
Similarity search - Domain/homology
Transcription regulator protein BACH1 / S-phase kinase-associated protein 1 / Cullin-1 / F-box only protein 22
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsShi H / Cao S / Zheng N
Funding support United States, 1 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Cell / Year: 2024
Title: Recognition of BACH1 quaternary structure degrons by two F-box proteins under oxidative stress.
Authors: Shiyun Cao / Sheena Faye Garcia / Huigang Shi / Ellie I James / Yuki Kito / Hui Shi / Haibin Mao / Sharon Kaisari / Gergely Rona / Sophia Deng / Hailey V Goldberg / Jackeline Ponce / Beatrix ...Authors: Shiyun Cao / Sheena Faye Garcia / Huigang Shi / Ellie I James / Yuki Kito / Hui Shi / Haibin Mao / Sharon Kaisari / Gergely Rona / Sophia Deng / Hailey V Goldberg / Jackeline Ponce / Beatrix Ueberheide / Luca Lignitto / Miklos Guttman / Michele Pagano / Ning Zheng /
Abstract: Ubiquitin-dependent proteolysis regulates diverse cellular functions with high substrate specificity, which hinges on the ability of ubiquitin E3 ligases to decode the targets' degradation signals, i. ...Ubiquitin-dependent proteolysis regulates diverse cellular functions with high substrate specificity, which hinges on the ability of ubiquitin E3 ligases to decode the targets' degradation signals, i.e., degrons. Here, we show that BACH1, a transcription repressor of antioxidant response genes, features two distinct unconventional degrons encrypted in the quaternary structure of its homodimeric BTB domain. These two degrons are both functionalized by oxidative stress and are deciphered by two complementary E3s. FBXO22 recognizes a degron constructed by the BACH1 BTB domain dimer interface, which is unmasked from transcriptional co-repressors after oxidative stress releases BACH1 from chromatin. When this degron is impaired by oxidation, a second BACH1 degron manifested by its destabilized BTB dimer is probed by a pair of FBXL17 proteins that remodels the substrate into E3-bound monomers for ubiquitination. Our findings highlight the multidimensionality of protein degradation signals and the functional complementarity of different ubiquitin ligases targeting the same substrate.
History
DepositionSep 20, 2023-
Header (metadata) releaseNov 6, 2024-
Map releaseNov 6, 2024-
UpdateJan 8, 2025-
Current statusJan 8, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_42051.png

Downloads & links

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Map

FileDownload / File: emd_42051.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationThe overall EM map of SCF-FBXO22-BACH1BTB complex from Non uniform refinement in cryoSPARC
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 400 pix.
= 336. Å		0.84 Å/pix.
x 400 pix.
= 336. Å		0.84 Å/pix.
x 400 pix.
= 336. Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.84 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.4
Minimum - Maximum-2.8524 - 3.953699
Average (Standard dev.)-0.00056936254 (±0.04968332)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 336.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: The composite EM map of SCF-FBXO22-BACH1BTB complex was...

Fileemd_42051_additional_1.map
AnnotationThe composite EM map of SCF-FBXO22-BACH1BTB complex was generated by combining the global EM map and local refinement map of FBXO22-BACH1 via Chimera.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
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Histogram

Histogram (log scale)

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Half map: The half map of SCF-FBXO22-BACH1BTB complex from Non...

Fileemd_42051_half_map_1.map
AnnotationThe half map of SCF-FBXO22-BACH1BTB complex from Non uniform refinement in cryoSPARC.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: The half map of SCF-FBXO22-BACH1BTB complex from Non...

Fileemd_42051_half_map_2.map
AnnotationThe half map of SCF-FBXO22-BACH1BTB complex from Non uniform refinement in cryoSPARC.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : FBXO22-BACH1BTB

EntireName: FBXO22-BACH1BTB
Components
  • Complex: FBXO22-BACH1BTB
    • Protein or peptide: F-box only protein 22
    • Protein or peptide: Transcription regulator protein BACH1
  • Protein or peptide: S-phase kinase-associated protein 1
  • Protein or peptide: Cullin-1

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Supramolecule #1: FBXO22-BACH1BTB

SupramoleculeName: FBXO22-BACH1BTB / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: F-box only protein 22

MacromoleculeName: F-box only protein 22 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 44.56227 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MEPVGCCGEC RGSSVDPRST FVLSNLAEVV ERVLTFLPAK ALLRVACVCR LWRECVRRVL RTHRSVTWIS AGLAEAGHLE GHCLVRVVA EELENVRILP HTVLYMADSE TFISLEECRG HKRARKRTSM ETALALEKLF PKQCQVLGIV TPGIVVTPMG S GSNRPQEI ...String:
MEPVGCCGEC RGSSVDPRST FVLSNLAEVV ERVLTFLPAK ALLRVACVCR LWRECVRRVL RTHRSVTWIS AGLAEAGHLE GHCLVRVVA EELENVRILP HTVLYMADSE TFISLEECRG HKRARKRTSM ETALALEKLF PKQCQVLGIV TPGIVVTPMG S GSNRPQEI EIGESGFALL FPQIEGIKIQ PFHFIKDPKN LTLERHQLTE VGLLDNPELR VVLVFGYNCC KVGASNYLQQ VV STFSDMN IILAGGQVDN LSSLTSEKNP LDIDASGVVG LSFSGHRIQS ATVLLNEDVS DEKTAEAAMQ RLKAANIPEH NTI GFMFAC VGRGFQYYRA KGNVEADAFR KFFPSVPLFG FFGNGEIGCD RIVTGNFILR KCNEVKDDDL FHSYTTIMAL IHLG SSK

UniProtKB: F-box only protein 22

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Macromolecule #2: Transcription regulator protein BACH1

MacromoleculeName: Transcription regulator protein BACH1 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 13.839761 KDa
Recombinant expressionOrganism: Escherichia coli BL21 (bacteria)
SequenceString:
SVFAYESSVH STNVLLSLND QRKKDVLCDV TIFVEGQRFR AHRSVLAACS SYFHSRIVGQ ADGELNITLP EEVTVKGFEP LIQFAYTAK LILSKENVDE VCKCVEFLSV HNIEESCFQF LKF

UniProtKB: Transcription regulator protein BACH1

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Macromolecule #3: S-phase kinase-associated protein 1

MacromoleculeName: S-phase kinase-associated protein 1 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 18.082326 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MPSIKLQSSD GEIFEVDVEI AKQSVTIKTM LEDLGMDDEG DDDPVPLPNV NAAILKKVIQ WCTHHKDDPP PPEDDENKEK RTDDIPVWD QEFLKVDQGT LFELILAANY LDIKGLLDVT CKTVANMIKG KTPEEIRKTF NIKNDFTEEE EAQVGSTQFC L

UniProtKB: S-phase kinase-associated protein 1

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Macromolecule #4: Cullin-1

MacromoleculeName: Cullin-1 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 88.501945 KDa
Recombinant expressionOrganism: Escherichia coli BL21 (bacteria)
SequenceString: KQIGLDQIWD DLRAGIQQVY TRQSMAKSRY MELYTHVYNY CTSVHQSNQA RGAGVPPSKS KKGQTPGGAQ FVGLELYKRL KEFLKNYLT NLLKDGEDLM DESVLKFYTQ QWEDYRFSSK VLNGICAYLN RHWVRRECDE GRKGIYEIYS LALVTWRDCL F RPLNKQVT ...String:
KQIGLDQIWD DLRAGIQQVY TRQSMAKSRY MELYTHVYNY CTSVHQSNQA RGAGVPPSKS KKGQTPGGAQ FVGLELYKRL KEFLKNYLT NLLKDGEDLM DESVLKFYTQ QWEDYRFSSK VLNGICAYLN RHWVRRECDE GRKGIYEIYS LALVTWRDCL F RPLNKQVT NAVLKLIEKE RNGETINTRL ISGVVQSYVE LGLNEDDAFA KGPTLTVYKE SFESQFLADT ERFYTRESTE FL QQNPVTE YMKKAEARLL EEQRRVQVYL HESTQDELAR KCEQVLIEKH LEIFHTEFQN LLDADKNEDL GRMYNLVSRI QDG LGELKK LLETHIHNQG LAAIEKCGEA ALNDPKMYVQ TVLDVHKKYN ALVMSAFNND AGFVAALDKA CGRFINNNAV TKMA QSSSK SPELLARYCD SLLKKSSKNP EEAELEDTLN QVMVVFKYIE DKDVFQKFYA KMLAKRLVHQ NSASDDAEAS MISKL KQAC GFEYTSKLQR MFQDIGVSKD LNEQFKKHLT NSEPLDLDFS IQVLSSGSWP FQQSCTFALP SELERSYQRF TAFYAS RHS GRKLTWLYQL SKGELVTNCF KNRYTLQAST FQMAILLQYN TEDAYTVQQL TDSTQIKMDI LAQVLQILLK SKLLVLE DE NANVDEVELK PDTLIKLYLG YKNKKLRVNI NVPMKTEQKQ EQETTHKNIE EDRKLLIQAA IVRIMKMRKV LKHQQLLG E VLTQLSSRFK PRVPVIKKCI DILIEKEYLE RVDGEKDTYS YLA

UniProtKB: Cullin-1

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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: 7.5
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 59.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.5 µm / Nominal defocus min: 0.8 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER / Details: ab-initio reconstruction
Final reconstructionAlgorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 413523
Initial angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: cryoSPARC
Final angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: cryoSPARC
Final 3D classificationSoftware - Name: cryoSPARC

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