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- PDB-6cri: Structure of the cargo bound AP-1:Arf1:tetherin-Nef stable closed... -
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Basic information
Entry | Database: PDB / ID: 6cri | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Title | Structure of the cargo bound AP-1:Arf1:tetherin-Nef stable closed trimer | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
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![]() | VIRAL PROTEIN / PROTEIN TRANSPORT / AP / HIV / Nef / trafficking | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Function / homology | ![]() negative regulation of plasmacytoid dendritic cell cytokine production / negative regulation of intracellular transport of viral material / response to interferon-beta / basolateral protein secretion / : / AP-1 adaptor complex / endosome to melanosome transport / Lysosome Vesicle Biogenesis / mitotic cleavage furrow ingression / trans-Golgi Network Vesicle Budding ...negative regulation of plasmacytoid dendritic cell cytokine production / negative regulation of intracellular transport of viral material / response to interferon-beta / basolateral protein secretion / : / AP-1 adaptor complex / endosome to melanosome transport / Lysosome Vesicle Biogenesis / mitotic cleavage furrow ingression / trans-Golgi Network Vesicle Budding / protein trimerization / response to interferon-alpha / platelet dense granule organization / Glycosphingolipid transport / metalloendopeptidase inhibitor activity / regulation of receptor internalization / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I / melanosome assembly / Intra-Golgi traffic / regulation of Arp2/3 complex-mediated actin nucleation / 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 / Synthesis of PIPs at the Golgi membrane / symbiont-mediated suppression of host autophagy / clathrin adaptor activity / positive regulation of leukocyte proliferation / MHC class II antigen presentation / CD4 receptor binding / thioesterase binding / Nef Mediated CD4 Down-regulation / dendritic spine organization / determination of left/right symmetry / long-term synaptic depression / clathrin-coated vesicle / azurophil granule membrane / COPI-dependent Golgi-to-ER retrograde traffic / clathrin binding / Lysosome Vesicle Biogenesis / negative regulation of viral genome replication / Golgi Associated Vesicle Biogenesis / cell leading edge / MHC class I protein binding / Synthesis of PIPs at the plasma membrane / B cell activation / host cell Golgi membrane / response to type II interferon / intracellular copper ion homeostasis / protein targeting / COPI-mediated anterograde transport / side of membrane / vesicle-mediated transport / clathrin-coated pit / regulation of calcium-mediated signaling / viral life cycle / Neutrophil degranulation / multivesicular body / MHC class II antigen presentation / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / cytoplasmic vesicle membrane / negative regulation of cell migration / Nef mediated downregulation of MHC class I complex cell surface expression / sarcomere / small monomeric GTPase / trans-Golgi network membrane / kidney development / regulation of actin cytoskeleton organization / intracellular protein transport / trans-Golgi network / negative regulation of cell growth / response to virus / cellular response to virus / SH3 domain binding / virion component / SARS-CoV-1 activates/modulates innate immune responses / Interferon alpha/beta signaling / synaptic vesicle / presynapse / heart development / ATPase binding / defense response to virus / positive regulation of canonical NF-kappaB signal transduction / early endosome / neuron projection / postsynaptic density / symbiont-mediated suppression of host innate immune response / apical plasma membrane / protein domain specific binding / membrane raft / Golgi membrane / signaling receptor binding / lysosomal membrane / innate immune response / focal adhesion / GTPase activity / intracellular membrane-bounded organelle / synapse / Neutrophil degranulation / protein kinase binding / GTP binding Similarity search - Function | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 6.8 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
![]() | Morris, K.L. / Buffalo, C.Z. / Hurley, J.H. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: HIV-1 Nefs Are Cargo-Sensitive AP-1 Trimerization Switches in Tetherin Downregulation. Authors: Kyle L Morris / Cosmo Z Buffalo / Christina M Stürzel / Elena Heusinger / Frank Kirchhoff / Xuefeng Ren / James H Hurley / ![]() ![]() Abstract: The HIV accessory protein Nef counteracts immune defenses by subverting coated vesicle pathways. The 3.7 Å cryo-EM structure of a closed trimer of the clathrin adaptor AP-1, the small GTPase Arf1, ...The HIV accessory protein Nef counteracts immune defenses by subverting coated vesicle pathways. The 3.7 Å cryo-EM structure of a closed trimer of the clathrin adaptor AP-1, the small GTPase Arf1, HIV-1 Nef, and the cytosolic tail of the restriction factor tetherin suggested a mechanism for inactivating tetherin by Golgi retention. The 4.3 Å structure of a mutant Nef-induced dimer of AP-1 showed how the closed trimer is regulated by the dileucine loop of Nef. HDX-MS and mutational analysis were used to show how cargo dynamics leads to alternative Arf1 trimerization, directing Nef targets to be either retained at the trans-Golgi or sorted to lysosomes. Phosphorylation of the NL4-3 M-Nef was shown to regulate AP-1 trimerization, explaining how O-Nefs lacking this phosphosite counteract tetherin but most M-Nefs do not. These observations show how the higher-order organization of a vesicular coat can be allosterically modulated to direct cargoes to distinct fates. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 1.1 MB | Display | ![]() |
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PDB format | ![]() | 953.9 KB | Display | ![]() |
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 | ![]() 7563MC ![]() 7453C ![]() 7454C ![]() 7455C ![]() 7456C ![]() 7457C ![]() 7458C ![]() 6cm9C ![]() 6d83C ![]() 6d84C ![]() 6dffC M: map data used to model this data C: citing same article ( |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 2 types, 12 molecules TNcYdZCHKULV
#1: Protein | Mass: 29964.326 Da / Num. of mol.: 6 Fragment: Tetherin UNP residues 2-26, Nef UNP residues 1-206 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() Gene: BST2, nef / Production host: ![]() ![]() #3: Protein | Mass: 18936.600 Da / Num. of mol.: 6 / Mutation: Q71L Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-AP-1 complex subunit ... , 4 types, 12 molecules BIJGQRMWXSab
#2: Protein | Mass: 64458.656 Da / Num. of mol.: 3 / Mutation: K359R, E476K Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #4: Protein | Mass: 66401.055 Da / Num. of mol.: 3 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #5: Protein | Mass: 48475.535 Da / Num. of mol.: 3 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #6: Protein | Mass: 16998.850 Da / Num. of mol.: 3 / Mutation: C148S Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Non-polymers , 2 types, 12 molecules 


#7: Chemical | ChemComp-GTP / #8: Chemical | ChemComp-MG / |
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-Details
Has protein modification | N |
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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: Structure of the cargo bound AP-1:Arf1:tetherin-Nef stable closed trimer Type: COMPLEX / Entity ID: #1-#6 / Source: RECOMBINANT |
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Molecular weight | Value: 0.70 MDa / Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() ![]() |
Buffer solution | pH: 8 Details: 20 mM Tris at pH 8.0, 200 mM NaCl, 5 mM MgCl2, and 0.5 mM TCEP |
Specimen | Conc.: 0.07 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: unspecified |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 296 K |
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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 |
Image recording | Electron dose: 62.4 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.13_2998: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 6.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 11108 / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | B value: 425 / Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Correlation coefficient | ||||||||||||||||||||||||
Refine LS restraints |
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