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- PDB-8cx1: Cryo-EM structure of human APOBEC3G/HIV-1 Vif/CBFbeta/ELOB/ELOC d... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8cx1 | ||||||
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Title | Cryo-EM structure of human APOBEC3G/HIV-1 Vif/CBFbeta/ELOB/ELOC dimeric complex in State 1 | ||||||
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![]() | VIRAL PROTEIN/IMMUNE SYSTEM/RNA / Viral protein / RNA binding protein / Complex / Ubiquitin E3 ligase / VIRAL PROTEIN-IMMUNE SYSTEM-RNA complex | ||||||
Function / homology | ![]() RUNX3 regulates RUNX1-mediated transcription / apolipoprotein B mRNA editing enzyme complex / RUNX1 regulates transcription of genes involved in BCR signaling / dCTP deaminase activity / cytidine deamination / RUNX1 regulates transcription of genes involved in interleukin signaling / 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 / cytidine deamination / RUNX1 regulates transcription of genes involved in interleukin signaling / 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 / : / lymphocyte differentiation / cytidine to uridine editing / cytidine deaminase activity / RUNX1 and FOXP3 control the development of regulatory T lymphocytes (Tregs) / negative regulation of viral process / negative regulation of single stranded viral RNA replication via double stranded DNA intermediate / : / 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 / RUNX3 Regulates Immune Response and Cell Migration / elongin complex / VCB complex / definitive hemopoiesis / 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 / positive regulation of defense response to virus by host / cell maturation / RNA Polymerase II Pre-transcription Events / viral life cycle / transcription corepressor binding / virion component / 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 / P-body / 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 / Evasion by RSV of host interferon responses / Regulation of expression of SLITs and ROBOs / osteoblast differentiation / Transcriptional regulation of granulopoiesis / protein polyubiquitination / Regulation of RUNX2 expression and 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 / protein-macromolecule adaptor activity / ubiquitin-dependent protein catabolic process / protein-containing complex assembly / defense response to virus / Estrogen-dependent gene expression / sequence-specific DNA binding / host cell cytoplasm / 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 / identical protein binding Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||
![]() | Li, Y. / Langley, C. / Azumaya, C.M. / Echeverria, I. / Chesarino, N.M. / Emerman, M. / Cheng, Y. / Gross, J.D. | ||||||
Funding support | ![]()
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![]() | ![]() 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 |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 343.8 KB | Display | ![]() |
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PDB format | ![]() | 275.5 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 27033MC ![]() 8cx0C ![]() 8cx2C M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 5 types, 10 molecules AFBGCHDIEJ
#1: Protein | Mass: 50034.598 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() References: UniProt: Q9HC16, single-stranded DNA cytosine deaminase #2: Protein | Mass: 22556.002 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #3: Protein | Mass: 21542.188 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 13147.781 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #5: Protein | Mass: 12485.135 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-RNA chain , 2 types, 2 molecules KL
#6: RNA chain | Mass: 2496.529 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
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#7: RNA chain | Mass: 2519.569 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() |
-Non-polymers , 1 types, 6 molecules ![](data/chem/img/ZN.gif)
#8: Chemical | ChemComp-ZN / |
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-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: HIV-1 Vif-E3 ligase substrate receptor (VCBC) in complex with human APOBEC3G and RNA Type: COMPLEX / Entity ID: #1-#7 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 7 |
Specimen | Conc.: 0.46 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm |
Image recording | Electron dose: 68 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 57207 / Symmetry type: POINT |