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- PDB-8d4c: beta-Arf1 mediated dimeric assembly of AP-1, Arf1, Nef complex wi... -

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Basic information

Entry
Database: PDB / ID: 8d4c
Titlebeta-Arf1 mediated dimeric assembly of AP-1, Arf1, Nef complex within lattice on MHC-I lipopeptide incorporated narrow membrane tubes
Components
  • (AP-1 complex subunit ...) x 4
  • ADP-ribosylation factor 1
  • HLA class I histocompatibility antigen, A alpha chain
  • Protein Nef
KeywordsPROTEIN TRANSPORT / nef / AP / trafficking
Function / homology
Function and homology information


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 / platelet dense granule organization / Glycosphingolipid transport ...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 / platelet dense granule organization / Glycosphingolipid transport / 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 / 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 / positive regulation of memory T cell activation / T cell mediated cytotoxicity directed against tumor cell target / TAP complex binding / COPI-dependent Golgi-to-ER retrograde traffic / clathrin binding / Golgi medial cisterna / positive regulation of CD8-positive, alpha-beta T cell activation / CD8-positive, alpha-beta T cell activation / positive regulation of CD8-positive, alpha-beta T cell proliferation / Lysosome Vesicle Biogenesis / CD8 receptor binding / Golgi Associated Vesicle Biogenesis / antigen processing and presentation of exogenous peptide antigen via MHC class I / cell leading edge / beta-2-microglobulin binding / MHC class I protein binding / Synthesis of PIPs at the plasma membrane / 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 / intracellular copper ion homeostasis / 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 / detection of bacterium / protein targeting / T cell receptor binding / COPI-mediated anterograde transport / vesicle-mediated transport / clathrin-coated pit / regulation of calcium-mediated signaling / viral life cycle / Neutrophil degranulation / MHC class II antigen presentation / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / cytoplasmic vesicle membrane / Nef mediated downregulation of MHC class I complex cell surface expression / sarcomere / small monomeric GTPase / trans-Golgi network membrane / kidney development / lumenal side of endoplasmic reticulum membrane / Endosomal/Vacuolar pathway / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / intracellular protein transport / trans-Golgi network / ER to Golgi transport vesicle membrane / peptide antigen assembly with MHC class I protein complex / 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 / cellular response to virus / peptide antigen binding / SH3 domain binding / positive regulation of T cell mediated cytotoxicity / virion component / positive regulation of type II interferon production / recycling endosome membrane / phagocytic vesicle membrane / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / Interferon gamma signaling / Interferon alpha/beta signaling / antibacterial humoral response / synaptic vesicle / E3 ubiquitin ligases ubiquitinate target proteins / presynapse / T cell receptor signaling pathway / heart development
Similarity search - Function
AP-1 complex subunit sigma / Adaptor protein complex AP-1, gamma subunit / Gamma-adaptin ear (GAE) domain / Gamma-adaptin ear (GAE) domain profile. / HIV-1 Nef protein, anchor domain superfamily / Clathrin adaptor, beta-adaptin, appendage, Ig-like subdomain / Beta2-adaptin appendage, C-terminal sub-domain / HIV negative factor Nef / AP-1/2/4 complex subunit beta / Adaptor protein complex, sigma subunit ...AP-1 complex subunit sigma / Adaptor protein complex AP-1, gamma subunit / Gamma-adaptin ear (GAE) domain / Gamma-adaptin ear (GAE) domain profile. / HIV-1 Nef protein, anchor domain superfamily / Clathrin adaptor, beta-adaptin, appendage, Ig-like subdomain / Beta2-adaptin appendage, C-terminal sub-domain / HIV negative factor Nef / AP-1/2/4 complex subunit beta / Adaptor protein complex, sigma subunit / HIV-1 Nef protein, core domain superfamily / Negative factor, (F-Protein) or Nef / : / Beta-adaptin appendage, C-terminal subdomain / Beta2-adaptin appendage, C-terminal sub-domain / ADP-ribosylation factor 1-5 / AP complex subunit beta / Clathrin adaptor complex, small chain / Clathrin adaptor complexes small chain signature. / Clathrin adaptor complexes medium chain signature 1. / Clathrin adaptor, mu subunit / Clathrin adaptor, mu subunit, conserved site / Clathrin adaptor complexes medium chain signature 2. / : / Coatomer/calthrin adaptor appendage, C-terminal subdomain / Clathrin adaptor, alpha/beta/gamma-adaptin, appendage, Ig-like subdomain / Adaptin C-terminal domain / Adaptin C-terminal domain / AP complex, mu/sigma subunit / Clathrin adaptor complex small chain / Adaptor complexes medium subunit family / AP-2 complex subunit mu, C-terminal superfamily / Clathrin/coatomer adaptor, adaptin-like, N-terminal / Adaptin N terminal region / Mu homology domain / Mu homology domain (MHD) profile. / Clathrin adaptor, appendage, Ig-like subdomain superfamily / Small GTPase superfamily, ARF type / small GTPase Arf family profile. / Sar1p-like members of the Ras-family of small GTPases / Small GTPase superfamily, ARF/SAR type / ADP-ribosylation factor family / Longin-like domain superfamily / ARF-like small GTPases; ARF, ADP-ribosylation factor / TBP domain superfamily / Armadillo/beta-catenin-like repeats / Armadillo / MHC class I, alpha chain, C-terminal / MHC_I C-terminus / MHC class I alpha chain, alpha1 alpha2 domains / Class I Histocompatibility antigen, domains alpha 1 and 2 / : / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / Rab subfamily of small GTPases / MHC classes I/II-like antigen recognition protein / Armadillo-like helical / Small GTP-binding protein domain / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Armadillo-type fold / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
GUANOSINE-5'-TRIPHOSPHATE / HLA class I histocompatibility antigen, A alpha chain / AP-1 complex subunit gamma-1 / AP-1 complex subunit mu-1 / ADP-ribosylation factor 1 / AP-1 complex subunit beta-1 / Protein Nef / AP-1 complex subunit sigma-3
Similarity search - Component
Biological speciesHomo sapiens (human)
Human immunodeficiency virus 1
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / subtomogram averaging / cryo EM / Resolution: 9.3 Å
AuthorsHooy, R.M. / Hurley, J.H.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)F32 AI152971 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)R01 AI120691 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)P50 AI150476 United States
CitationJournal: Sci Adv / Year: 2022
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
DepositionJun 1, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 14, 2023Provider: repository / Type: Initial release
Revision 1.1Jun 12, 2024Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / em_3d_fitting_list
Item: _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id ..._em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
C: ADP-ribosylation factor 1
H: ADP-ribosylation factor 1
N: Protein Nef
Y: HLA class I histocompatibility antigen, A alpha chain
B: AP-1 complex subunit beta-1
G: AP-1 complex subunit gamma-1
L: Protein Nef
M: AP-1 complex subunit mu-1
S: AP-1 complex subunit sigma-3
D: ADP-ribosylation factor 1
F: ADP-ribosylation factor 1
K: Protein Nef
P: HLA class I histocompatibility antigen, A alpha chain
A: AP-1 complex subunit beta-1
E: AP-1 complex subunit gamma-1
I: Protein Nef
J: AP-1 complex subunit mu-1
O: AP-1 complex subunit sigma-3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)668,60826
Polymers666,41818
Non-polymers2,1908
Water00
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 , 2 types, 8 molecules CHDFNLKI

#1: Protein
ADP-ribosylation factor 1


Mass: 20590.547 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Details: N-terminal myristoylation / Source: (gene. exp.) Homo sapiens (human) / Gene: ARF1 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P84077
#2: Protein
Protein Nef / 3'ORF / Negative factor / F-protein


Mass: 24154.049 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Details: N-terminal myristoylation / Source: (gene. exp.) Human immunodeficiency virus 1 / Gene: nef / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q90VU7

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Protein/peptide , 1 types, 2 molecules YP

#3: Protein/peptide HLA class I histocompatibility antigen, A alpha chain / Human leukocyte antigen A / HLA-A


Mass: 4139.429 Da / Num. of mol.: 2 / Mutation: T345S, S349G, G355S, C363A
Source method: isolated from a genetically manipulated source
Details: Conjugated to lipid maleimide via N-terminal cysteine
Source: (gene. exp.) Homo sapiens (human) / Gene: HLA-A, HLAA / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P04439

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AP-1 complex subunit ... , 4 types, 8 molecules BAGEMJSO

#4: Protein AP-1 complex subunit beta-1 / Adaptor protein complex AP-1 subunit beta-1 / Adaptor-related protein complex 1 subunit beta-1 / ...Adaptor protein complex AP-1 subunit beta-1 / Adaptor-related protein complex 1 subunit beta-1 / Beta-1-adaptin / Beta-adaptin 1 / Clathrin assembly protein complex 1 beta large chain / Golgi adaptor HA1/AP1 adaptin beta subunit


Mass: 104605.266 Da / Num. of mol.: 2 / Mutation: K359R, E476K
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: AP1B1, ADTB1, BAM22, CLAPB2 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q10567
#5: Protein AP-1 complex subunit gamma-1 / Adaptor protein complex AP-1 subunit gamma-1 / Adaptor-related protein complex 1 subunit gamma-1 / ...Adaptor protein complex AP-1 subunit gamma-1 / Adaptor-related protein complex 1 subunit gamma-1 / Clathrin assembly protein complex 1 gamma-1 large chain / Gamma-adaptin / Gamma1-adaptin / Golgi adaptor HA1/AP1 adaptin subunit gamma-1


Mass: 68062.891 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Ap1g1, Adtg, Clapg1 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P22892
#6: Protein AP-1 complex subunit mu-1 / AP-mu chain family member mu1A / Adaptor protein complex AP-1 subunit mu-1 / Adaptor-related ...AP-mu chain family member mu1A / Adaptor protein complex AP-1 subunit mu-1 / Adaptor-related protein complex 1 subunit mu-1 / Clathrin assembly protein complex 1 mu-1 medium chain 1 / Clathrin coat assembly protein AP47 / Clathrin coat-associated protein AP47 / Golgi adaptor HA1/AP1 adaptin mu-1 subunit / Mu-adaptin 1 / Mu1A-adaptin


Mass: 48606.730 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Ap1m1, Cltnm / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P35585
#7: Protein AP-1 complex subunit sigma-3 / Adaptor protein complex AP-1 subunit sigma-1C / Adaptor-related protein complex 1 subunit sigma-1C ...Adaptor protein complex AP-1 subunit sigma-1C / Adaptor-related protein complex 1 subunit sigma-1C / Clathrin assembly protein complex 1 sigma-1C small chain / Golgi adaptor HA1/AP1 adaptin sigma-1C subunit / Sigma 1C subunit of AP-1 clathrin / Sigma-adaptin 1C / Sigma1C-adaptin


Mass: 18305.273 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: AP1S3 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q96PC3

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Non-polymers , 2 types, 8 molecules

#8: Chemical
ChemComp-GTP / GUANOSINE-5'-TRIPHOSPHATE


Mass: 523.180 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C10H16N5O14P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: GTP, energy-carrying molecule*YM
#9: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg / 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: subtomogram averaging

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Sample preparation

Component
IDNameTypeDetailsEntity IDParent-IDSource
1Complex of AP-1, Arf1, Nef and MHC-I cytosolic tail on a tubulated lipid bilayerCOMPLEXDimeric contacts in lattice on narrow membrane tubes mediated by beta-Arf1 interactions#1-#70RECOMBINANT
2AP-1 heterotetramerCOMPLEXAll four subunits are co-expressed from the same plasmid. Assembly occurs in bacteria during expression.#4-#71RECOMBINANT
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
21Homo sapiens (human)9606
32Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
21Escherichia coli BL21(DE3) (bacteria)469008
32Escherichia coli BL21(DE3) (bacteria)469008
Buffer solutionpH: 7.2
Details: HEPES/KOAc concentrated stocks are diluted to their final concentrations then pH'd to 7.2 with KOH prior to use in experiments.
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMHEPES1
2125 mMpotassium acetateKOAc1
32 mMmagnesium chloride1
41 mMDTT1
SpecimenConc.: 0.2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid type: EMS Lacey Carbon
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 K
Details: 60 second wait, 3-5 second blot, 597 filter paper, 0.5 second drain. Sample was supplemented with 10nm BSA-gold fiducials. 3.5ul of the mixture was double-side blotted.

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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 FIELD / Nominal magnification: 42000 X / Nominal defocus max: 4500 nm / Nominal defocus min: 1500 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 3 sec. / Electron dose: 3 e/Å2 / Avg electron dose per subtomogram: 123 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1
Details: Tilt images were collected in movie-mode. Each movie/tilt consisted of 3-4 frames each
EM imaging opticsEnergyfilter slit width: 25 eV
Image scansWidth: 5760 / Height: 4092

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Processing

Software
NameVersionClassificationNB
phenix.real_space_refine1.20_4459refinement
PHENIX1.20_4459refinement
EM software
IDNameVersionCategory
1Dynamo1.1.532volume selection
2SerialEMimage acquisition
4NOVACTFCTF correction
7UCSF Chimera1.14model fitting
8UCSF ChimeraX1.3model fitting
10PHENIX1.20-4459model refinement
14RELION3.1.13D reconstruction
Image processingDetails: The images were gain-normalized
CTF correctionDetails: CTF was estimated on a per-tilt basis in IMOD (4.11) using CTFPLOTTER. The results were used as input to NOVACTF during 3DCTF correction.
Type: PHASE FLIPPING ONLY
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 9.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 7004 / Symmetry type: POINT
EM volume selectionDetails: Tubes were annotated by tracing the center of the tube in Dynamo and recording the average apparent diameter. Initial subtomogram positions were picked using uniform radial and axial sampling.
Num. of tomograms: 31 / Num. of volumes extracted: 61864 / Reference model: Reference-free
Atomic model buildingProtocol: RIGID BODY FIT
Atomic model building

3D fitting-ID: 1 / Source name: PDB / Type: experimental model

IDPDB-IDPdb chain-IDAccession codeInitial refinement model-ID
16CM9

6cm9

6CM91
24EN2

4en2

B4EN22
34EN2

4en2

E4EN22
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 32.79 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.000518008
ELECTRON MICROSCOPYf_angle_d0.222422514
ELECTRON MICROSCOPYf_chiral_restr0.076216
ELECTRON MICROSCOPYf_plane_restr0.00094454
ELECTRON MICROSCOPYf_dihedral_angle_d4.99744506

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