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- PDB-8cx1: Cryo-EM structure of human APOBEC3G/HIV-1 Vif/CBFbeta/ELOB/ELOC d... -

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Basic information

Entry
Database: PDB / ID: 8cx1
TitleCryo-EM structure of human APOBEC3G/HIV-1 Vif/CBFbeta/ELOB/ELOC dimeric complex in State 1
Components
  • Core-binding factor subunit beta
  • DNA dC->dU-editing enzyme APOBEC-3G
  • Elongin-B
  • Elongin-C
  • RNA (5'-R(P*AP*AP*AP*AP*UP*AP*UP*U)-3')
  • RNA (5'-R(P*UP*AP*AP*AP*UP*AP*UP*U)-3')
  • Virion infectivity factor
KeywordsVIRAL PROTEIN/IMMUNE SYSTEM/RNA / Viral protein / RNA binding protein / Complex / Ubiquitin E3 ligase / VIRAL PROTEIN-IMMUNE SYSTEM-RNA complex
Function / homology
Function and homology information


RUNX3 regulates RUNX1-mediated transcription / apolipoprotein B mRNA editing enzyme complex / RUNX1 regulates transcription of genes involved in BCR signaling / dCTP deaminase activity / RUNX1 regulates transcription of genes involved in interleukin signaling / cytidine deamination / RUNX2 regulates bone development / core-binding factor complex / RUNX1 regulates expression of components of tight junctions / positive regulation of CD8-positive, alpha-beta T cell differentiation ...RUNX3 regulates RUNX1-mediated transcription / apolipoprotein B mRNA editing enzyme complex / RUNX1 regulates transcription of genes involved in BCR signaling / dCTP deaminase activity / RUNX1 regulates transcription of genes involved in interleukin signaling / cytidine deamination / RUNX2 regulates bone development / core-binding factor complex / RUNX1 regulates expression of components of tight junctions / positive regulation of CD8-positive, alpha-beta T cell differentiation / RUNX2 regulates chondrocyte maturation / base conversion or substitution editing / single-stranded DNA cytosine deaminase / negative regulation of CD4-positive, alpha-beta T cell differentiation / DNA cytosine deamination / cytidine to uridine editing / deoxycytidine deaminase activity / lymphocyte differentiation / cytidine deaminase activity / negative regulation of single stranded viral RNA replication via double stranded DNA intermediate / RUNX1 and FOXP3 control the development of regulatory T lymphocytes (Tregs) / negative regulation of viral process / RUNX2 regulates genes involved in cell migration / RUNX2 regulates genes involved in differentiation of myeloid cells / Transcriptional regulation by RUNX2 / retrotransposon silencing / RUNX1 regulates transcription of genes involved in differentiation of keratinocytes / myeloid cell differentiation / target-directed miRNA degradation / elongin complex / RUNX3 Regulates Immune Response and Cell Migration / VCB complex / definitive hemopoiesis / DNA demethylation / RUNX1 regulates transcription of genes involved in differentiation of myeloid cells / Regulation of RUNX1 Expression and Activity / Cul5-RING ubiquitin ligase complex / Cul2-RING ubiquitin ligase complex / negative regulation of viral genome replication / RUNX1 regulates transcription of genes involved in WNT signaling / RUNX1 regulates estrogen receptor mediated transcription / RUNX1 interacts with co-factors whose precise effect on RUNX1 targets is not known / RUNX2 regulates osteoblast differentiation / APOBEC3G mediated resistance to HIV-1 infection / Pausing and recovery of Tat-mediated HIV elongation / Tat-mediated HIV elongation arrest and recovery / RUNX3 regulates p14-ARF / HIV elongation arrest and recovery / Pausing and recovery of HIV elongation / Tat-mediated elongation of the HIV-1 transcript / Formation of HIV-1 elongation complex containing HIV-1 Tat / Formation of HIV elongation complex in the absence of HIV Tat / RNA Polymerase II Transcription Elongation / Formation of RNA Pol II elongation complex / cell maturation / positive regulation of defense response to virus by host / viral life cycle / RNA Polymerase II Pre-transcription Events / transcription corepressor binding / virion component / P-body / transcription elongation by RNA polymerase II / transcription initiation at RNA polymerase II promoter / TP53 Regulates Transcription of DNA Repair Genes / Vif-mediated degradation of APOBEC3G / Regulation of RUNX3 expression and activity / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / Inactivation of CSF3 (G-CSF) signaling / osteoblast differentiation / Regulation of expression of SLITs and ROBOs / protein polyubiquitination / Transcriptional regulation of granulopoiesis / Regulation of RUNX2 expression and activity / protein-macromolecule adaptor activity / positive regulation of proteasomal ubiquitin-dependent protein catabolic process / Antigen processing: Ubiquitination & Proteasome degradation / Neddylation / RUNX1 regulates transcription of genes involved in differentiation of HSCs / ubiquitin-dependent protein catabolic process / protein-containing complex assembly / defense response to virus / Estrogen-dependent gene expression / host cell cytoplasm / sequence-specific DNA binding / transcription by RNA polymerase II / transcription coactivator activity / protein ubiquitination / ribonucleoprotein complex / innate immune response / ubiquitin protein ligase binding / regulation of transcription by RNA polymerase II / host cell plasma membrane / negative regulation of transcription by RNA polymerase II / positive regulation of transcription by RNA polymerase II / RNA binding / zinc ion binding / nucleoplasm / membrane / identical protein binding
Similarity search - Function
Retroviral Vif (Viral infectivity) protein / Retroviral Vif (Viral infectivity) protein / Core-binding factor, beta subunit / Core-binding factor, beta subunit superfamily / Core binding factor beta subunit / Novel AID APOBEC clade 2 / APOBEC/CMP deaminase, zinc-binding / Cytidine and deoxycytidylate deaminases zinc-binding region signature. / Cytidine and deoxycytidylate deaminase domain / Cytidine and deoxycytidylate deaminases domain profile. ...Retroviral Vif (Viral infectivity) protein / Retroviral Vif (Viral infectivity) protein / Core-binding factor, beta subunit / Core-binding factor, beta subunit superfamily / Core binding factor beta subunit / Novel AID APOBEC clade 2 / APOBEC/CMP deaminase, zinc-binding / Cytidine and deoxycytidylate deaminases zinc-binding region signature. / Cytidine and deoxycytidylate deaminase domain / Cytidine and deoxycytidylate deaminases domain profile. / Elongin B / Elongin-C / Cytidine deaminase-like / S-phase kinase-associated protein 1-like / SKP1 component, POZ domain / Skp1 family, tetramerisation domain / Found in Skp1 protein family / SKP1/BTB/POZ domain superfamily / Ubiquitin family / Ubiquitin homologues / Ubiquitin-like domain / Ubiquitin domain profile. / Ubiquitin-like domain superfamily
Similarity search - Domain/homology
RNA / Core-binding factor subunit beta / Elongin-C / Elongin-B / Virion infectivity factor / DNA dC->dU-editing enzyme APOBEC-3G
Similarity search - Component
Biological speciesHomo sapiens (human)
Human immunodeficiency virus 1
Spodoptera frugiperda (fall armyworm)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsLi, Y. / Langley, C. / Azumaya, C.M. / Echeverria, I. / Chesarino, N.M. / Emerman, M. / Cheng, Y. / Gross, J.D.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI150476 United States
CitationJournal: Nature / Year: 2023
Title: The structural basis for HIV-1 Vif antagonism of human APOBEC3G.
Authors: Yen-Li Li / Caroline A Langley / Caleigh M Azumaya / Ignacia Echeverria / Nicholas M Chesarino / Michael Emerman / Yifan Cheng / John D Gross /
Abstract: The APOBEC3 (A3) proteins are host antiviral cellular proteins that hypermutate the viral genome of diverse viral families. In retroviruses, this process requires A3 packaging into viral particles. ...The APOBEC3 (A3) proteins are host antiviral cellular proteins that hypermutate the viral genome of diverse viral families. In retroviruses, this process requires A3 packaging into viral particles. The lentiviruses encode a protein, Vif, that antagonizes A3 family members by targeting them for degradation. Diversification of A3 allows host escape from Vif whereas adaptations in Vif enable cross-species transmission of primate lentiviruses. How this 'molecular arms race' plays out at the structural level is unknown. Here, we report the cryogenic electron microscopy structure of human APOBEC3G (A3G) bound to HIV-1 Vif, and the hijacked cellular proteins that promote ubiquitin-mediated proteolysis. A small surface explains the molecular arms race, including a cross-species transmission event that led to the birth of HIV-1. Unexpectedly, we find that RNA is a molecular glue for the Vif-A3G interaction, enabling Vif to repress A3G by ubiquitin-dependent and -independent mechanisms. Our results suggest a model in which Vif antagonizes A3G by intercepting it in its most dangerous form for the virus-when bound to RNA and on the pathway to packaging-to prevent viral restriction. By engaging essential surfaces required for restriction, Vif exploits a vulnerability in A3G, suggesting a general mechanism by which RNA binding helps to position key residues necessary for viral antagonism of a host antiviral gene.
History
DepositionMay 19, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 15, 2023Provider: repository / Type: Initial release
Revision 1.1Feb 22, 2023Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed ..._citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Apr 5, 2023Group: 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

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: DNA dC->dU-editing enzyme APOBEC-3G
B: Virion infectivity factor
C: Core-binding factor subunit beta
D: Elongin-B
E: Elongin-C
F: DNA dC->dU-editing enzyme APOBEC-3G
G: Virion infectivity factor
H: Core-binding factor subunit beta
I: Elongin-B
J: Elongin-C
K: RNA (5'-R(P*UP*AP*AP*AP*UP*AP*UP*U)-3')
L: RNA (5'-R(P*AP*AP*AP*AP*UP*AP*UP*U)-3')
hetero molecules


Theoretical massNumber of molelcules
Total (without water)244,94018
Polymers244,54812
Non-polymers3926
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 5 types, 10 molecules AFBGCHDIEJ

#1: Protein DNA dC->dU-editing enzyme APOBEC-3G / APOBEC-related cytidine deaminase / APOBEC-related protein / ARCD / APOBEC-related protein 9 / ARP- ...APOBEC-related cytidine deaminase / APOBEC-related protein / ARCD / APOBEC-related protein 9 / ARP-9 / CEM-15 / CEM15 / Deoxycytidine deaminase / A3G


Mass: 50034.598 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: APOBEC3G, MDS019 / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: Q9HC16, single-stranded DNA cytosine deaminase
#2: Protein Virion infectivity factor / Vif / SOR protein


Mass: 22556.002 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: vif / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q77YG0
#3: Protein Core-binding factor subunit beta / CBF-beta / Polyomavirus enhancer-binding protein 2 beta subunit / PEA2-beta / PEBP2-beta / SL3-3 ...CBF-beta / Polyomavirus enhancer-binding protein 2 beta subunit / PEA2-beta / PEBP2-beta / SL3-3 enhancer factor 1 subunit beta / SL3/AKV core-binding factor beta subunit


Mass: 21542.188 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: CBFB / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q13951
#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.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOB, TCEB2 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q15370
#5: 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.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ELOC, TCEB1 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q15369

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RNA chain , 2 types, 2 molecules KL

#6: RNA chain RNA (5'-R(P*UP*AP*AP*AP*UP*AP*UP*U)-3')


Mass: 2496.529 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Spodoptera frugiperda (fall armyworm)
#7: RNA chain RNA (5'-R(P*AP*AP*AP*AP*UP*AP*UP*U)-3')


Mass: 2519.569 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Spodoptera frugiperda (fall armyworm)

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Non-polymers , 1 types, 6 molecules

#8: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION

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Details

Has ligand of interestY

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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: HIV-1 Vif-E3 ligase substrate receptor (VCBC) in complex with human APOBEC3G and RNA
Type: COMPLEX / Entity ID: #1-#7 / Source: MULTIPLE SOURCES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7
SpecimenConc.: 0.46 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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 FIELDBright-field microscopy / Nominal magnification: 105000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm
Image recordingElectron dose: 68 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC3particle selection
2SerialEM3.8.6image acquisition
4cryoSPARC3CTF correction
10cryoSPARC3initial Euler assignment
11cryoSPARC3final Euler assignment
12RELION3.1classification
13RELION3.13D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 57207 / Symmetry type: POINT

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