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- PDB-8ubu: Cryo-EM structure of dimeric SCF-FBXL17-BACH1BTB E3 ligase comple... -

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Basic information

Entry
Database: PDB / ID: 8ubu
TitleCryo-EM structure of dimeric SCF-FBXL17-BACH1BTB E3 ligase complex close conformation
Components
  • Cullin-1
  • E3 ubiquitin-protein ligase RBX1, N-terminally processed
  • F-box/LRR-repeat protein 17
  • S-phase kinase-associated protein 1
  • Transcription regulator protein BACH1
KeywordsLIGASE / SCF / FBXL17 / BACH1 / F-box protein / CUL1 / Cullin / E3 ligase
Function / homology
Function and homology information


Regulation of HMOX1 expression and activity / regulation of xenophagy / Parkin-FBXW7-Cul1 ubiquitin ligase complex / F-box domain binding / synaptic assembly at neuromuscular junction / regulation of cell cycle process / neural crest cell differentiation / ligand-modulated transcription factor activity / regulation of BMP signaling pathway / PcG protein complex ...Regulation of HMOX1 expression and activity / regulation of xenophagy / Parkin-FBXW7-Cul1 ubiquitin ligase complex / F-box domain binding / synaptic assembly at neuromuscular junction / regulation of cell cycle process / neural crest cell differentiation / ligand-modulated transcription factor activity / regulation of BMP signaling pathway / PcG protein complex / negative regulation of beige fat cell differentiation / regulation of mitophagy / cullin-RING-type E3 NEDD8 transferase / NEDD8 transferase activity / regulation of smoothened signaling pathway / regulation of centrosome duplication / cullin-RING ubiquitin ligase complex / maintenance of protein location in nucleus / Cul7-RING ubiquitin ligase complex / Loss of Function of FBXW7 in Cancer and NOTCH1 Signaling / cellular response to chemical stress / regulation of TOR signaling / positive regulation of protein autoubiquitination / RNA polymerase II transcription initiation surveillance / protein neddylation / ubiquitin ligase activator activity / regulation of DNA damage checkpoint / NEDD8 ligase activity / NFE2L2 regulating anti-oxidant/detoxification enzymes / negative regulation of response to oxidative stress / protein K27-linked ubiquitination / 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 / SCF-dependent proteasomal ubiquitin-dependent protein catabolic process / negative regulation of mitophagy / Prolactin receptor signaling / limb development / Cul4A-RING E3 ubiquitin ligase complex / Cul4-RING E3 ubiquitin ligase complex / Cul4B-RING E3 ubiquitin ligase complex / ubiquitin ligase complex scaffold activity / protein quality control for misfolded or incompletely synthesized proteins / centrosome duplication / cilium assembly / protein monoubiquitination / cullin family protein binding / GSK3B-mediated proteasomal degradation of PD-L1(CD274) / ubiquitin-like ligase-substrate adaptor activity / signal transduction in response to DNA damage / Nuclear events stimulated by ALK signaling in cancer / protein K48-linked ubiquitination / negative regulation of insulin receptor signaling pathway / regulation of cellular response to insulin stimulus / positive regulation of TORC1 signaling / animal organ morphogenesis / intrinsic apoptotic signaling pathway / transcription-coupled nucleotide-excision repair / post-translational protein modification / regulation of mitotic cell cycle / molecular function activator activity / negative regulation of canonical NF-kappaB signal transduction / cellular response to amino acid stimulus / site of DNA damage / Regulation of BACH1 activity / MAP3K8 (TPL2)-dependent MAPK1/3 activation / T cell activation / Heme signaling / G1/S transition of mitotic cell cycle / negative regulation of canonical Wnt signaling pathway / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Vpu mediated degradation of CD4 / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of DVL / cell population proliferation / Degradation of CRY and PER proteins / Activation of NF-kappaB in B cells / Iron uptake and transport / Degradation of GLI1 by the proteasome / Recognition of DNA damage by PCNA-containing replication complex / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Negative regulation of NOTCH4 signaling / RING-type E3 ubiquitin transferase / regulation of circadian rhythm / Hedgehog 'on' state / beta-catenin binding / Vif-mediated degradation of APOBEC3G / DNA-binding transcription repressor activity, RNA polymerase II-specific / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Evasion by RSV of host interferon responses / NOTCH1 Intracellular Domain Regulates Transcription
Similarity search - Function
: / : / F-box/LRR-repeat protein 15, leucine rich repeat domain / BACH, basic leucine zipper (bZIP) domain / Basic leucine zipper domain, Maf-type / bZIP Maf transcription factor / Transcription factor, Skn-1-like, DNA-binding domain superfamily / : / Leucine-rich repeat, cysteine-containing subtype / Leucine-rich repeat - CC (cysteine-containing) subfamily ...: / : / F-box/LRR-repeat protein 15, leucine rich repeat domain / BACH, basic leucine zipper (bZIP) domain / Basic leucine zipper domain, Maf-type / bZIP Maf transcription factor / Transcription factor, Skn-1-like, DNA-binding domain superfamily / : / Leucine-rich repeat, cysteine-containing subtype / Leucine-rich repeat - CC (cysteine-containing) subfamily / A Receptor for Ubiquitination Targets / F-box domain profile. / F-box-like / 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 / Zinc finger, RING-H2-type / RING-H2 zinc finger domain / Basic-leucine zipper (bZIP) domain signature. / : / Cullin protein neddylation domain / Basic-leucine zipper (bZIP) domain profile. / basic region leucin zipper / Cullin, conserved site / Cullin family signature. / Leucine Rich repeat / Cullin, N-terminal / Cullin repeat-like-containing domain superfamily / Cullin protein, neddylation domain / Cullin / Cullin protein neddylation domain / Basic-leucine zipper domain / Cullin alpha solenoid domain / Basic-leucine zipper domain superfamily / Cullin / : / Cullin alpha+beta domain / 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 / BTB/POZ domain / BTB domain profile. / Broad-Complex, Tramtrack and Bric a brac / BTB/POZ domain / SKP1/BTB/POZ domain superfamily / Leucine-rich repeat / Leucine-rich repeat 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
Transcription regulator protein BACH1 / E3 ubiquitin-protein ligase RBX1 / S-phase kinase-associated protein 1 / Cullin-1 / F-box/LRR-repeat protein 17
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.6 Å
AuthorsShi, H. / Cao, S. / Zheng, N.
Funding support United States, 1items
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 25, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 6, 2024Provider: repository / Type: Initial release
Revision 1.1Nov 13, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_abbrev / _citation.journal_id_ASTM ..._citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _em_admin.last_update
Revision 1.2Nov 20, 2024Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_PubMed / _citation.title / _em_admin.last_update
Revision 1.3Nov 27, 2024Group: Data collection / Category: em_admin / Item: _em_admin.last_update
Revision 1.4Jan 8, 2025Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Cullin-1
B: E3 ubiquitin-protein ligase RBX1, N-terminally processed
C: S-phase kinase-associated protein 1
D: F-box/LRR-repeat protein 17
E: Transcription regulator protein BACH1
G: S-phase kinase-associated protein 1
H: Cullin-1
I: E3 ubiquitin-protein ligase RBX1, N-terminally processed
K: F-box/LRR-repeat protein 17
L: Transcription regulator protein BACH1


Theoretical massNumber of molelcules
Total (without water)352,53710
Polymers352,53710
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 Cullin-1 / CUL-1


Mass: 88501.945 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CUL1 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: Q13616
#2: Protein E3 ubiquitin-protein ligase RBX1, N-terminally processed / E3 ubiquitin-protein transferase RBX1 / N-terminally processed


Mass: 10840.410 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RBX1, RNF75, ROC1 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: P62877
#3: Protein S-phase kinase-associated protein 1 / Cyclin-A/CDK2-associated protein p19 / p19A / Organ of Corti protein 2 / OCP-2 / Organ of Corti ...Cyclin-A/CDK2-associated protein p19 / p19A / Organ of Corti protein 2 / OCP-2 / Organ of Corti protein II / OCP-II / RNA polymerase II elongation factor-like protein / SIII / Transcription elongation factor B polypeptide 1-like / p19skp1


Mass: 18580.834 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SKP1, EMC19, OCP2, SKP1A, TCEB1L / Cell line (production host): High Five / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: P63208
#4: Protein F-box/LRR-repeat protein 17


Mass: 44505.512 Da / Num. of mol.: 2 / Fragment: UNP residues 310-701
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: FBXL17 / Cell line (production host): High Five / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q9UF56
#5: Protein Transcription regulator protein BACH1


Mass: 13839.761 Da / Num. of mol.: 2 / Fragment: BTB domain (UNP residues 7-128)
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: BACH1 / Production host: Escherichia coli BL21 (bacteria) / References: UniProt: O14867
Has ligand of interestN
Has protein modificationY

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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: The SCF-F-box protein with BACH1 BTB Domain, dimeric SCF-BFXL17-BACH1BTB
Type: COMPLEX / Entity ID: #5, #3-#4, #1-#2 / Source: MULTIPLE SOURCES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE

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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: 25000 nm / Nominal defocus min: 5000 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 60 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM software
IDNameCategory
2SerialEMimage acquisition
7UCSF Chimeramodel fitting
8PHENIXmodel fitting
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
12cryoSPARCclassification
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 4.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 71155 / Algorithm: BACK PROJECTION / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model building
IDPDB-ID 3D fitting-IDAccession codeInitial refinement model-IDSource nameType
16WCQ

6wcq

16WCQ1PDBexperimental model
21LDJ

1ldj

11LDJ2PDBexperimental model

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