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- PDB-8d9w: beta-Arf1 homodimeric interface within AP-1, Arf1, Nef, MHC-I lat... -
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Basic information
Entry | Database: PDB / ID: 8d9w | ||||||||||||
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Title | beta-Arf1 homodimeric interface within AP-1, Arf1, Nef, MHC-I lattice on narrow tubes | ||||||||||||
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![]() | Protein Transport/Viral Protein / complex / coat / Protein Transport-Viral Protein complex | ||||||||||||
Function / homology | ![]() basolateral protein secretion / perturbation by virus of host immune response / negative regulation of CD4 production / mitotic cleavage furrow ingression / endosome to melanosome transport / trans-Golgi Network Vesicle Budding / AP-1 adaptor complex / Lysosome Vesicle Biogenesis / platelet dense granule organization / protein trimerization ...basolateral protein secretion / perturbation by virus of host immune response / negative regulation of CD4 production / mitotic cleavage furrow ingression / endosome to melanosome transport / trans-Golgi Network Vesicle Budding / AP-1 adaptor complex / Lysosome Vesicle Biogenesis / platelet dense granule organization / protein trimerization / Glycosphingolipid transport / regulation of receptor internalization / melanosome assembly / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I / Intra-Golgi traffic / regulation of Arp2/3 complex-mediated actin nucleation / Golgi to vacuole transport / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class II / Synthesis of PIPs at the Golgi membrane / Golgi Associated Vesicle Biogenesis / symbiont-mediated suppression of host apoptosis / clathrin adaptor activity / suppression by virus of host autophagy / MHC class II antigen presentation / CD4 receptor binding / Nef Mediated CD4 Down-regulation / thioesterase binding / dendritic spine organization / determination of left/right symmetry / long-term synaptic depression / clathrin-coated vesicle / COPI-dependent Golgi-to-ER retrograde traffic / T cell mediated cytotoxicity directed against tumor cell target / positive regulation of memory T cell activation / TAP complex binding / Lysosome Vesicle Biogenesis / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / clathrin binding / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell proliferation / Golgi Associated Vesicle Biogenesis / CD8 receptor binding / cell leading edge / antigen processing and presentation of exogenous peptide antigen via MHC class I / MHC class I protein binding / endoplasmic reticulum exit site / host cell Golgi membrane / Synthesis of PIPs at the plasma membrane / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent / TAP binding / protection from natural killer cell mediated cytotoxicity / intracellular copper ion homeostasis / protein targeting / beta-2-microglobulin binding / COPI-mediated anterograde transport / T cell receptor binding / detection of bacterium / clathrin-coated pit / regulation of calcium-mediated signaling / vesicle-mediated transport / viral life cycle / MHC class II antigen presentation / Neutrophil degranulation / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / sarcomere / small monomeric GTPase / trans-Golgi network membrane / Nef mediated downregulation of MHC class I complex cell surface expression / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-independent / antigen processing and presentation of endogenous peptide antigen via MHC class Ib / kidney development / Endosomal/Vacuolar pathway / lumenal side of endoplasmic reticulum membrane / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / intracellular protein transport / trans-Golgi network / cytoplasmic vesicle membrane / peptide antigen assembly with MHC class I protein complex / ER to Golgi transport vesicle membrane / MHC class I peptide loading complex / T cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I / positive regulation of T cell cytokine production / cellular response to virus / MHC class I protein complex / SH3 domain binding / virion component / positive regulation of T cell mediated cytotoxicity / recycling endosome membrane / phagocytic vesicle membrane / positive regulation of type II interferon production / peptide antigen binding / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / Interferon gamma signaling / Interferon alpha/beta signaling / E3 ubiquitin ligases ubiquitinate target proteins / early endosome membrane / ATPase binding / presynapse Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / subtomogram averaging / cryo EM / Resolution: 9.3 Å | ||||||||||||
![]() | Hooy, R.H. / Hurley, J.H. | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Self-assembly and structure of a clathrin-independent AP-1:Arf1 tubular membrane coat. Authors: Richard M Hooy / Yuichiro Iwamoto / Dan A Tudorica / Xuefeng Ren / James H Hurley / ![]() Abstract: The adaptor protein (AP) complexes not only form the inner layer of clathrin coats but also have clathrin-independent roles in membrane traffic whose mechanisms are unknown. HIV-1 Nef hijacks AP-1 to ...The adaptor protein (AP) complexes not only form the inner layer of clathrin coats but also have clathrin-independent roles in membrane traffic whose mechanisms are unknown. HIV-1 Nef hijacks AP-1 to sequester major histocompatibility complex class I (MHC-I), evading immune detection. We found that AP-1:Arf1:Nef:MHC-I forms a coat on tubulated membranes without clathrin and determined its structure. The coat assembles via Arf1 dimer interfaces. AP-1-positive tubules are enriched in cells upon clathrin knockdown. Nef localizes preferentially to AP-1 tubules in cells, explaining how Nef sequesters MHC-I. Coat contact residues are conserved across Arf isoforms and the Arf-dependent AP complexes AP-1, AP-3, and AP-4. Thus, AP complexes can self-assemble with Arf1 into tubular coats without clathrin or other scaffolding factors. The AP-1:Arf1 coat defines the structural basis of a broader class of tubulovesicular membrane coats as an intermediate in clathrin vesicle formation from internal membranes and as an MHC-I sequestration mechanism in HIV-1 infection. | ||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 582.1 KB | Display | ![]() |
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PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 27186MC ![]() 7ux3C ![]() 8d4cC ![]() 8d4dC ![]() 8d4eC ![]() 8d4fC ![]() 8d4gC ![]() 8d9rC ![]() 8d9sC ![]() 8d9tC ![]() 8d9uC ![]() 8d9vC 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 , 2 types, 6 molecules NUVdFI
#1: Protein | Mass: 24285.244 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Details: Glycine 2 is myristoylated / Source: (gene. exp.) ![]() ![]() ![]() ![]() #5: Protein | Mass: 20590.547 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Details: Gly2 is myristoylated / Source: (gene. exp.) ![]() ![]() ![]() |
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-Protein/peptide , 1 types, 2 molecules Yj
#2: Protein/peptide | Mass: 4542.884 Da / Num. of mol.: 2 / Mutation: T345S, S349G, G355S, C363A Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-AP-1 complex subunit ... , 4 types, 12 molecules BADEMXZaKOef
#3: Protein | Mass: 104736.461 Da / Num. of mol.: 4 / Mutation: K359R,E476K Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 48606.730 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #6: Protein | Mass: 68194.094 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #7: Protein | Mass: 18305.273 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Non-polymers , 2 types, 4 molecules ![](data/chem/img/MG.gif)
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#8: Chemical | #9: Chemical | |
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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: subtomogram averaging |
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Sample preparation
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Buffer solution | pH: 7.2 | ||||||||||||||||||
Specimen | Conc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: TFS KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 42000 X / Nominal defocus max: 4500 nm / Nominal defocus min: 1500 nm / Alignment procedure: COMA FREE |
Image recording | Electron dose: 2.7 e/Å2 / Avg electron dose per subtomogram: 120 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
EM imaging optics | Energyfilter slit width: 25 eV |
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Processing
CTF correction | Type: PHASE FLIPPING ONLY | ||||||||||||||||||||||||
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Symmetry | Point symmetry: C2 (2 fold cyclic) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 9.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 8174 / Symmetry type: POINT | ||||||||||||||||||||||||
EM volume selection | Num. of tomograms: 38 / Num. of volumes extracted: 43110 | ||||||||||||||||||||||||
Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | ||||||||||||||||||||||||
Displacement parameters | Biso mean: 31 Å2 | ||||||||||||||||||||||||
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