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- PDB-6yaf: AP2 on a membrane containing tyrosine-based cargo peptide -

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Basic information

Entry
Database: PDB / ID: 6yaf
TitleAP2 on a membrane containing tyrosine-based cargo peptide
Components
  • AP-2 complex subunit alpha-2
  • AP-2 complex subunit beta
  • AP-2 complex subunit mu
  • AP-2 complex subunit sigma
  • Tyrosine type cargo signal derived from TGN38
KeywordsENDOCYTOSIS / clathrin / clathrin adaptor / ap2 / clathrin assembly
Function / homology
Function and homology information


protein metabolic process => GO:0019538 / Gap junction degradation / Formation of annular gap junctions / LDL clearance / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / LDL clearance / WNT5A-dependent internalization of FZD4 / VLDLR internalisation and degradation / Retrograde neurotrophin signalling ...protein metabolic process => GO:0019538 / Gap junction degradation / Formation of annular gap junctions / LDL clearance / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / LDL clearance / WNT5A-dependent internalization of FZD4 / VLDLR internalisation and degradation / Retrograde neurotrophin signalling / Nef Mediated CD8 Down-regulation / Trafficking of GluR2-containing AMPA receptors / Retrograde neurotrophin signalling / Retrograde transport at the Trans-Golgi-Network / WNT5A-dependent internalization of FZD2, FZD5 and ROR2 / clathrin adaptor complex / WNT5A-dependent internalization of FZD4 / Trafficking of GluR2-containing AMPA receptors / WNT5A-dependent internalization of FZD4 / extrinsic component of presynaptic endocytic zone membrane / VLDLR internalisation and degradation / MHC class II antigen presentation / Recycling pathway of L1 / AP-2 adaptor complex / regulation of vesicle size / postsynaptic neurotransmitter receptor internalization / Recycling pathway of L1 / Retrograde neurotrophin signalling / Cargo recognition for clathrin-mediated endocytosis / Cargo recognition for clathrin-mediated endocytosis / clathrin-coated endocytic vesicle / positive regulation of synaptic vesicle endocytosis / LDL clearance / Clathrin-mediated endocytosis / clathrin adaptor activity / Clathrin-mediated endocytosis / vesicle budding from membrane / membrane coat / membrane organization / trans-Golgi network transport vesicle / clathrin-dependent endocytosis / MHC class II antigen presentation / protein serine/threonine kinase binding / coronary vasculature development / signal sequence binding / endolysosome membrane / Nef Mediated CD4 Down-regulation / negative regulation of protein localization to plasma membrane / low-density lipoprotein particle receptor binding / aorta development / Neutrophil degranulation / ventricular septum development / clathrin binding / Golgi Associated Vesicle Biogenesis / Recycling pathway of L1 / Trafficking of GluR2-containing AMPA receptors / positive regulation of receptor internalization / synaptic vesicle endocytosis / EPH-ephrin mediated repulsion of cells / clathrin-coated pit / transport vesicle / vesicle-mediated transport / MHC class II antigen presentation / VLDLR internalisation and degradation / phosphatidylinositol binding / post-translational protein modification / kidney development / Post-translational protein phosphorylation / clathrin-coated endocytic vesicle membrane / intracellular protein transport / trans-Golgi network / terminal bouton / cytoplasmic side of plasma membrane / receptor internalization / kinase binding / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / endocytic vesicle membrane / disordered domain specific binding / synaptic vesicle / Cargo recognition for clathrin-mediated endocytosis / presynapse / Clathrin-mediated endocytosis / cytoplasmic vesicle / postsynapse / protein-containing complex assembly / Potential therapeutics for SARS / transmembrane transporter binding / membrane => GO:0016020 / endosome / protein domain specific binding / endoplasmic reticulum lumen / intracellular membrane-bounded organelle / lipid binding / glutamatergic synapse / synapse / protein-containing complex binding / protein kinase binding / Golgi apparatus / nucleoplasm / membrane
Similarity search - Function
AP-2 complex subunit sigma / Clathrin adaptor, alpha-adaptin, appendage, C-terminal subdomain / Adaptor protein complex AP-2, alpha subunit / Alpha adaptin AP2, C-terminal domain / Mu2, C-terminal domain / AP-2 complex subunit mu, N-terminal / Adaptor protein complex, sigma subunit / Clathrin adaptor, beta-adaptin, appendage, Ig-like subdomain / Beta-adaptin appendage, C-terminal subdomain / AP-1/2/4 complex subunit beta ...AP-2 complex subunit sigma / Clathrin adaptor, alpha-adaptin, appendage, C-terminal subdomain / Adaptor protein complex AP-2, alpha subunit / Alpha adaptin AP2, C-terminal domain / Mu2, C-terminal domain / AP-2 complex subunit mu, N-terminal / Adaptor protein complex, sigma subunit / Clathrin adaptor, beta-adaptin, appendage, Ig-like subdomain / Beta-adaptin appendage, C-terminal subdomain / AP-1/2/4 complex subunit beta / Beta2-adaptin appendage, C-terminal sub-domain / Beta2-adaptin appendage, C-terminal sub-domain / 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 / Adaptor complexes medium subunit family / AP complex, mu/sigma subunit / Clathrin adaptor complex small chain / AP-2 complex subunit mu, C-terminal superfamily / Mu homology domain / Mu homology domain (MHD) profile. / Clathrin adaptor, alpha/beta/gamma-adaptin, appendage, Ig-like subdomain / Adaptin C-terminal domain / Adaptin C-terminal domain / Clathrin/coatomer adaptor, adaptin-like, N-terminal / Adaptin N terminal region / Clathrin adaptor, appendage, Ig-like subdomain superfamily / Longin-like domain superfamily / TBP domain superfamily / Armadillo/beta-catenin-like repeats / Armadillo / Armadillo-like helical / Armadillo-type fold
Similarity search - Domain/homology
Trans-Golgi network integral membrane protein 2 / AP-2 complex subunit alpha-2 / AP-2 complex subunit sigma / AP-2 complex subunit beta / AP-2 complex subunit mu
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
Homo sapiens (human)
Mus musculus (house mouse)
MethodELECTRON MICROSCOPY / subtomogram averaging / cryo EM / Resolution: 9.1 Å
AuthorsKovtun, O. / Kane Dickson, V. / Kelly, B.T. / Owen, D. / Briggs, J.A.G.
Funding support United Kingdom, 2items
OrganizationGrant numberCountry
Wellcome Trust207455/Z/17/Z United Kingdom
Medical Research Council (MRC, United Kingdom)MC_UP_1201/16 United Kingdom
CitationJournal: Sci Adv / Year: 2020
Title: Architecture of the AP2/clathrin coat on the membranes of clathrin-coated vesicles.
Authors: Oleksiy Kovtun / Veronica Kane Dickson / Bernard T Kelly / David J Owen / John A G Briggs /
Abstract: Clathrin-mediated endocytosis (CME) is crucial for modulating the protein composition of a cell's plasma membrane. Clathrin forms a cage-like, polyhedral outer scaffold around a vesicle, to which ...Clathrin-mediated endocytosis (CME) is crucial for modulating the protein composition of a cell's plasma membrane. Clathrin forms a cage-like, polyhedral outer scaffold around a vesicle, to which cargo-selecting clathrin adaptors are attached. Adaptor protein complex (AP2) is the key adaptor in CME. Crystallography has shown AP2 to adopt a range of conformations. Here, we used cryo-electron microscopy, tomography, and subtomogram averaging to determine structures, interactions, and arrangements of clathrin and AP2 at the key steps of coat assembly, from AP2 in solution to membrane-assembled clathrin-coated vesicles (CCVs). AP2 binds cargo and PtdIns(4,5) (phosphatidylinositol 4,5-bisphosphate)-containing membranes via multiple interfaces, undergoing conformational rearrangement from its cytosolic state. The binding mode of AP2 β2 appendage into the clathrin lattice in CCVs and buds implies how the adaptor structurally modulates coat curvature and coat disassembly.
History
DepositionMar 12, 2020Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jul 29, 2020Provider: repository / Type: Initial release
Revision 1.1Aug 12, 2020Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Aug 19, 2020Group: Database references / Category: citation / citation_author
Item: _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

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Assembly

Deposited unit
A: AP-2 complex subunit alpha-2
B: AP-2 complex subunit beta
M: AP-2 complex subunit mu
P: Tyrosine type cargo signal derived from TGN38
S: AP-2 complex subunit sigma


Theoretical massNumber of molelcules
Total (without water)245,9525
Polymers245,9525
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: equilibrium centrifugation, liposome pull-downs
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area12800 Å2
ΔGint-51 kcal/mol
Surface area80690 Å2
MethodPISA

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Components

#1: Protein AP-2 complex subunit alpha-2 / 100 kDa coated vesicle protein C / Adaptor protein complex AP-2 subunit alpha-2 / Adaptor-related ...100 kDa coated vesicle protein C / Adaptor protein complex AP-2 subunit alpha-2 / Adaptor-related protein complex 2 subunit alpha-2 / Alpha-adaptin C / Alpha2-adaptin / Clathrin assembly protein complex 2 alpha-C large chain / Plasma membrane adaptor HA2/AP2 adaptin alpha C subunit


Mass: 70310.062 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Ap2a2, Adtab / Production host: Escherichia coli (E. coli) / References: UniProt: P18484
#2: Protein AP-2 complex subunit beta / AP105B / Adaptor protein complex AP-2 subunit beta / Adaptor-related protein complex 2 subunit beta ...AP105B / Adaptor protein complex AP-2 subunit beta / Adaptor-related protein complex 2 subunit beta / Beta-2-adaptin / Beta-adaptin / Clathrin assembly protein complex 2 beta large chain / Plasma membrane adaptor HA2/AP2 adaptin beta subunit


Mass: 105619.344 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: AP2B1, ADTB2, CLAPB1 / Production host: Escherichia coli (E. coli) / References: UniProt: P63010
#3: Protein AP-2 complex subunit mu / AP-2 mu chain / Adaptor protein complex AP-2 subunit mu / Adaptor-related protein complex 2 subunit ...AP-2 mu chain / Adaptor protein complex AP-2 subunit mu / Adaptor-related protein complex 2 subunit mu / Clathrin assembly protein complex 2 mu medium chain / Clathrin coat assembly protein AP50 / Clathrin coat-associated protein AP50 / Mu2-adaptin / Plasma membrane adaptor AP-2 50 kDa protein


Mass: 51044.113 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Ap2m1 / Production host: Escherichia coli (E. coli) / References: UniProt: P84092
#4: Protein/peptide Tyrosine type cargo signal derived from TGN38


Mass: 1940.255 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human) / References: UniProt: O43493*PLUS
#5: Protein AP-2 complex subunit sigma / Adaptor protein complex AP-2 subunit sigma / Adaptor-related protein complex 2 subunit sigma / ...Adaptor protein complex AP-2 subunit sigma / Adaptor-related protein complex 2 subunit sigma / Clathrin assembly protein 2 sigma small chain / Clathrin coat assembly protein AP17 / Clathrin coat-associated protein AP17 / Plasma membrane adaptor AP-2 17 kDa protein / Sigma-adaptin 3b / Sigma2-adaptin


Mass: 17038.688 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Ap2s1, Ap17, Claps2 / Production host: Escherichia coli (E. coli) / References: UniProt: P62743

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: 3D ARRAY / 3D reconstruction method: subtomogram averaging

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Sample preparation

Component
IDNameTypeDetailsEntity IDParent-IDSource
1AP2 on membranesCOMPLEXAP2 on membranes containing tyrosine-based cargo peptideall0MULTIPLE SOURCES
2AP-2 complex subunits alpha-2 and muCOMPLEX#1, #31RECOMBINANT
3AP-2 complex subunit betaCOMPLEX#21RECOMBINANT
4AP-2 complex subunit sigmaCOMPLEX#51RECOMBINANT
5Tyrosine type cargo signal derived from TGN38COMPLEX#41RECOMBINANT
Molecular weightUnits: MEGADALTONS / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
12Rattus norvegicus (Norway rat)10116
23Homo sapiens (human)9606
34Mus musculus (house mouse)10090
45Homo sapiens (human)9606
Source (recombinant)
IDEntity assembly-IDOrganismNcbi tax-ID
12Escherichia coli (E. coli)562
23Escherichia coli (E. coli)562
34Escherichia coli (E. coli)562
45Synthetic construct (others)32630
Buffer solutionpH: 7.2
Buffer component
IDConc.NameBuffer-ID
110 mMHepes KOH1
2120 mMPotassium Acetate1
32 mMMagnesium chloride1
45 mM2-Mercaptoethanol1
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Details: The sample contained AP2 and 400 nm extruded liposomes
Specimen supportGrid type: C-flat-2/2
VitrificationInstrument: LEICA EM GP / Cryogen name: ETHANE / Humidity: 98 % / Chamber temperature: 291 K
Details: The sample was supplemented with 10 nm nanogold fiducials, and 3 ul of the mixture was backside blotted for 3 seconds.

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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 FIELDBright-field microscopy / Nominal magnification: 81000 X / Calibrated magnification: 81000 X / Nominal defocus max: 6500 nm / Nominal defocus min: 1500 nm / Calibrated defocus min: 1500 nm / Calibrated defocus max: 6500 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm / Alignment procedure: ZEMLIN TABLEAU
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 0.2 sec. / Electron dose: 3.2 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of grids imaged: 2
Details: The images were collected in movie mode at 10 frames per second
EM imaging opticsEnergyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV
Image scansWidth: 3838 / Height: 3710 / Movie frames/image: 10 / Used frames/image: 1-10

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Processing

EM software
IDNameVersionCategory
1TOMvolume selection
2SerialEM3.6image acquisition
4NOVACTF1CTF correction
7MDFF1.7model fitting
10TOMfinal Euler assignment
11AV3final Euler assignment
13TOM3D reconstruction
14AV33D reconstruction
15PHENIXmodel refinement
Image processingDetails: The images were low pass filtered according to the cumulative radiation dose.
CTF correctionDetails: CTF correction in novaCTF with by multiplication / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 9.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 100556 / Symmetry type: POINT
EM volume selectionMethod: geometrically defined initial positions / Num. of tomograms: 112237 / Num. of volumes extracted: 585669 / Reference model: reference-free
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL / Target criteria: correlation coefficient
Atomic model buildingPDB-ID: 2XA7

2xa7

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