[English] 日本語
Yorodumi
- PDB-8okx: Structure of cGAS in complex with SPSB3-ELOBC -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8okx
TitleStructure of cGAS in complex with SPSB3-ELOBC
Components
  • Cyclic GMP-AMP synthase
  • Elongin-B
  • Elongin-C
  • SPRY domain-containing SOCS box protein 3
KeywordsIMMUNE SYSTEM / cGAS / degradation / UPS
Function / homology
Function and homology information


2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / STING mediated induction of host immune responses / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / target-directed miRNA degradation / elongin complex / regulation of immunoglobulin production / cGAS/STING signaling pathway / regulation of T cell activation ...2',3'-cyclic GMP-AMP synthase activity / cyclic GMP-AMP synthase / STING mediated induction of host immune responses / paracrine signaling / poly-ADP-D-ribose modification-dependent protein binding / target-directed miRNA degradation / elongin complex / regulation of immunoglobulin production / cGAS/STING signaling pathway / regulation of T cell activation / pattern recognition receptor signaling pathway / : / VCB complex / negative regulation of epithelial to mesenchymal transition / Cul5-RING ubiquitin ligase complex / SCF ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / cytoplasmic pattern recognition receptor signaling pathway / negative regulation of cGAS/STING signaling pathway / cellular response to exogenous dsRNA / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / positive regulation of type I interferon production / negative regulation of double-strand break repair via homologous recombination / : / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / ubiquitin-like ligase-substrate adaptor activity / protein K48-linked ubiquitination / Formation of HIV elongation complex in the absence of HIV Tat / nucleosome binding / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / positive regulation of defense response to virus by host / phosphatidylinositol-4,5-bisphosphate binding / RNA Polymerase II Pre-transcription Events / activation of innate immune response / transcription corepressor binding / determination of adult lifespan / TP53 Regulates Transcription of DNA Repair Genes / transcription initiation at RNA polymerase II promoter / transcription elongation by RNA polymerase II / molecular condensate scaffold activity / Vif-mediated degradation of APOBEC3G / Inactivation of CSF3 (G-CSF) signaling / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Evasion by RSV of host interferon responses / Regulation of expression of SLITs and ROBOs / positive regulation of cellular senescence / Antigen processing: Ubiquitination & Proteasome degradation / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / site of double-strand break / Neddylation / protein-containing complex assembly / double-stranded DNA binding / ubiquitin-dependent protein catabolic process / protein-macromolecule adaptor activity / defense response to virus / proteasome-mediated ubiquitin-dependent protein catabolic process / nuclear body / protein ubiquitination / innate immune response / DNA repair / DNA damage response / ubiquitin protein ligase binding / chromatin binding / regulation of transcription by RNA polymerase II / GTP binding / protein homodimerization activity / DNA binding / nucleoplasm / ATP binding / metal ion binding / nucleus / plasma membrane / cytosol / cytoplasm
Similarity search - Function
SPRY domain-containing SOCS box protein 3, SPRY domain / : / SOCS box domain / SOCS box domain profile. / SOCS_box / Mab-21-like, nucleotidyltransferase domain / Mab-21 protein nucleotidyltransferase domain / Mab-21-like / Mab-21-like, HhH/H2TH-like domain / Mab-21 protein HhH/H2TH-like domain ...SPRY domain-containing SOCS box protein 3, SPRY domain / : / SOCS box domain / SOCS box domain profile. / SOCS_box / Mab-21-like, nucleotidyltransferase domain / Mab-21 protein nucleotidyltransferase domain / Mab-21-like / Mab-21-like, HhH/H2TH-like domain / Mab-21 protein HhH/H2TH-like domain / Mab-21 / Elongin-C / Elongin B / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / SPRY domain / B30.2/SPRY domain / B30.2/SPRY domain profile. / B30.2/SPRY domain superfamily / Domain in SPla and the RYanodine Receptor. / SPRY domain / SKP1/BTB/POZ domain superfamily / Ubiquitin family / Ubiquitin homologues / Ubiquitin domain profile. / Ubiquitin-like domain / Concanavalin A-like lectin/glucanase domain superfamily / Ubiquitin-like domain superfamily
Similarity search - Domain/homology
Elongin-C / Elongin-B / SPRY domain-containing SOCS box protein 3 / Cyclic GMP-AMP synthase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.51 Å
AuthorsXu, P.B. / Ablasser, A.
Funding supportEuropean Union, 1items
OrganizationGrant numberCountry
European Molecular Biology Organization (EMBO)ALTF 184-2021European Union
CitationJournal: Nature / Year: 2024
Title: The CRL5-SPSB3 ubiquitin ligase targets nuclear cGAS for degradation.
Authors: Pengbiao Xu / Ying Liu / Chong Liu / Baptiste Guey / Lingyun Li / Pauline Melenec / Jonathan Ricci / Andrea Ablasser /
Abstract: Cyclic GMP-AMP synthase (cGAS) senses aberrant DNA during infection, cancer and inflammatory disease, and initiates potent innate immune responses through the synthesis of 2'3'-cyclic GMP-AMP (cGAMP). ...Cyclic GMP-AMP synthase (cGAS) senses aberrant DNA during infection, cancer and inflammatory disease, and initiates potent innate immune responses through the synthesis of 2'3'-cyclic GMP-AMP (cGAMP). The indiscriminate activity of cGAS towards DNA demands tight regulatory mechanisms that are necessary to maintain cell and tissue homeostasis under normal conditions. Inside the cell nucleus, anchoring to nucleosomes and competition with chromatin architectural proteins jointly prohibit cGAS activation by genomic DNA. However, the fate of nuclear cGAS and its role in cell physiology remains unclear. Here we show that the ubiquitin proteasomal system (UPS) degrades nuclear cGAS in cycling cells. We identify SPSB3 as the cGAS-targeting substrate receptor that associates with the cullin-RING ubiquitin ligase 5 (CRL5) complex to ligate ubiquitin onto nuclear cGAS. A cryo-electron microscopy structure of nucleosome-bound cGAS in a complex with SPSB3 reveals a highly conserved Asn-Asn (NN) minimal degron motif at the C terminus of cGAS that directs SPSB3 recruitment, ubiquitylation and cGAS protein stability. Interference with SPSB3-regulated nuclear cGAS degradation primes cells for type I interferon signalling, conferring heightened protection against infection by DNA viruses. Our research defines protein degradation as a determinant of cGAS regulation in the nucleus and provides structural insights into an element of cGAS that is amenable to therapeutic exploitation.
History
DepositionMar 29, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Feb 14, 2024Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Additional map / Part number: 2 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Additional map / Part number: 2 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Additional map / Part number: 2 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Feb 14, 2024Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Mar 13, 2024Group: Database references / Category: citation / citation_author / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Apr 10, 2024Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.3Jul 9, 2025Group: Data collection / Structure summary / Category: em_admin / em_software / pdbx_entry_details
Item: _em_admin.last_update / _em_software.name / _pdbx_entry_details.has_protein_modification
Revision 1.1Jul 9, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Cyclic GMP-AMP synthase
B: SPRY domain-containing SOCS box protein 3
C: Elongin-C
D: Elongin-B
hetero molecules


Theoretical massNumber of molelcules
Total (without water)95,8285
Polymers95,7624
Non-polymers651
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

-
Components

#1: Protein Cyclic GMP-AMP synthase / cGAMP synthase / cGAS / h-cGAS / 2'3'-cGAMP synthase / Mab-21 domain-containing protein 1


Mass: 42714.145 Da / Num. of mol.: 1 / Mutation: K285A R300A K428A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CGAS, C6orf150, MB21D1 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q8N884, cyclic GMP-AMP synthase
#2: Protein SPRY domain-containing SOCS box protein 3 / SSB-3


Mass: 27415.240 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SPSB3, C16orf31, SSB3 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q6PJ21
#3: Protein Elongin-C / EloC / Elongin 15 kDa subunit / RNA polymerase II transcription factor SIII subunit C / SIII p15 / ...EloC / Elongin 15 kDa subunit / RNA polymerase II transcription factor SIII subunit C / SIII p15 / Transcription elongation factor B polypeptide 1


Mass: 12485.135 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOC, TCEB1 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q15369
#4: Protein Elongin-B / EloB / Elongin 18 kDa subunit / RNA polymerase II transcription factor SIII subunit B / SIII p18 / ...EloB / Elongin 18 kDa subunit / RNA polymerase II transcription factor SIII subunit B / SIII p18 / Transcription elongation factor B polypeptide 2


Mass: 13147.781 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOB, TCEB2 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q15370
#5: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationN

-
Experimental details

-
Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

-
Sample preparation

ComponentName: cGAS-Spsb3-EloBC complex / Type: COMPLEX / Entity ID: #1-#4 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.4 / Details: PBS buffer
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: C-flat-2/2
VitrificationCryogen name: ETHANE

-
Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 600 nm
Image recordingElectron dose: 40 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

-
Processing

SoftwareName: PHENIX / Version: 1.20rc2_4400: / Classification: refinement
EM softwareName: PHENIX / Category: model refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.51 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 592494 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0076555
ELECTRON MICROSCOPYf_angle_d0.7928824
ELECTRON MICROSCOPYf_dihedral_angle_d4.581864
ELECTRON MICROSCOPYf_chiral_restr0.043959
ELECTRON MICROSCOPYf_plane_restr0.0081129

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more