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- PDB-8d9v: gamma-Arf1 homodimeric interface within AP-1, Arf1, Nef lattice o... -
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Basic information
Entry | Database: PDB / ID: 8d9v | ||||||||||||
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Title | gamma-Arf1 homodimeric interface within AP-1, Arf1, Nef lattice on narrow membrane tubes | ||||||||||||
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![]() | VIRAL PROTEIN / nef / AP / HIV / trafficking | ||||||||||||
Function / homology | ![]() basolateral protein secretion / perturbation by virus of host immune response / negative regulation of CD4 production / endosome to melanosome transport / AP-1 adaptor complex / Lysosome Vesicle Biogenesis / platelet dense granule organization / protein trimerization / melanosome assembly / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I ...basolateral protein secretion / perturbation by virus of host immune response / negative regulation of CD4 production / endosome to melanosome transport / AP-1 adaptor complex / Lysosome Vesicle Biogenesis / platelet dense granule organization / protein trimerization / melanosome assembly / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I / Golgi to vacuole transport / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class II / 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 / thioesterase binding / determination of left/right symmetry / clathrin-coated vesicle / 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 / 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 / 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 / protein targeting / beta-2-microglobulin binding / 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 / 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 / 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 / heart development / T cell receptor signaling pathway / antibacterial humoral response / ER-Phagosome pathway / postsynaptic density / early endosome / defense response to Gram-positive bacterium / immune response / Golgi membrane / external side of plasma membrane / lysosomal membrane / intracellular membrane-bounded organelle / innate immune response / signaling receptor binding / GTPase activity / synapse / endoplasmic reticulum membrane / GTP binding / protein kinase binding Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / subtomogram averaging / cryo EM / Resolution: 9.4 Å | ||||||||||||
![]() | Hooy, R.M. / 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. | ||||||||||||
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-Related structure data
Related structure data | ![]() 27187MC ![]() 7ux3C ![]() 8d4cC ![]() 8d4dC ![]() 8d4eC ![]() 8d4fC ![]() 8d4gC ![]() 8d9rC ![]() 8d9sC ![]() 8d9tC ![]() 8d9uC ![]() 8d9wC C: citing same article ( M: map data used to model this data |
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Similar structure data | Similarity search - Function & homology ![]() |
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Assembly
Deposited unit | ![]()
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Noncrystallographic symmetry (NCS) | NCS domain:
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