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- PDB-6owo: CRYO-EM STRUCTURE OF PHOSPHORYLATED AP-2 CORE BOUND TO NECAP -

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Basic information

Entry
Database: PDB / ID: 6owo
TitleCRYO-EM STRUCTURE OF PHOSPHORYLATED AP-2 CORE BOUND TO NECAP
Components
  • AP-2 complex subunit alpha-2
  • AP-2 complex subunit beta
  • AP-2 complex subunit mu
  • AP-2 complex subunit sigma
  • Adaptin ear-binding coat-associated protein 2
KeywordsENDOCYTOSIS / AP2 / NECAP2 PROTEIN / CLATHRIN VESICLE / LIPID-BINDING / ADAPTOR / MEMBRANE / TRANSPORT / PHOSPHORYLATION
Function / homology
Function and homology information


Formation of annular gap junctions / Gap junction degradation / clathrin vesicle coat / 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 ...Formation of annular gap junctions / Gap junction degradation / clathrin vesicle coat / 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 / Trafficking of GluR2-containing AMPA receptors / Retrograde neurotrophin signalling / clathrin coat / clathrin adaptor complex / WNT5A-dependent internalization of FZD4 / extrinsic component of presynaptic endocytic zone membrane / VLDLR internalisation and degradation / cardiac septum development / 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 / clathrin coat assembly / Cargo recognition for clathrin-mediated endocytosis / Cargo recognition for clathrin-mediated endocytosis / positive regulation of synaptic vesicle endocytosis / Clathrin-mediated endocytosis / clathrin adaptor activity / Clathrin-mediated endocytosis / vesicle budding from membrane / membrane coat / clathrin-dependent endocytosis / MHC class II antigen presentation / protein serine/threonine kinase binding / neurotransmitter receptor internalization / positive regulation of protein localization to membrane / coronary vasculature development / signal sequence binding / negative regulation of protein localization to plasma membrane / low-density lipoprotein particle receptor binding / aorta development / regulation of hematopoietic stem cell differentiation / ventricular septum development / clathrin binding / positive regulation of endocytosis / Trafficking of GluR2-containing AMPA receptors / positive regulation of receptor internalization / synaptic vesicle endocytosis / clathrin-coated pit / vesicle-mediated transport / Neutrophil degranulation / phosphatidylinositol binding / secretory granule / kidney development / intracellular protein transport / cytoplasmic side of plasma membrane / receptor internalization / kinase binding / endocytosis / disordered domain specific binding / synaptic vesicle / protein transport / heart development / cytoplasmic vesicle / postsynapse / protein-containing complex assembly / transmembrane transporter binding / protein domain specific binding / intracellular membrane-bounded organelle / lipid binding / glutamatergic synapse / synapse / protein-containing complex binding / protein kinase binding / mitochondrion / plasma membrane
Similarity search - Function
NECAP, PHear domain / Protein of unknown function (DUF1681) / Beta-Lactamase - #60 / Mu homology domain, subdomain B / 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 ...NECAP, PHear domain / Protein of unknown function (DUF1681) / Beta-Lactamase - #60 / Mu homology domain, subdomain B / 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 / Leucine-rich Repeat Variant / Leucine-rich Repeat Variant / Beta-Lactamase / Armadillo-like helical / Alpha Horseshoe / PH-like domain superfamily / Armadillo-type fold / Immunoglobulin-like / Sandwich / 2-Layer Sandwich / Mainly Beta / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
AP-2 complex subunit alpha-2 / AP-2 complex subunit sigma / AP-2 complex subunit mu / Adaptin ear-binding coat-associated protein 2 / AP-2 complex subunit beta
Similarity search - Component
Biological speciesMus musculus (house mouse)
Rattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å
AuthorsPartlow, E.A. / Baker, R.W. / Beacham, G.M. / Chappie, J.S. / Leschziner, A.E. / Hollopeter, G.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM127548-01A1 United States
CitationJournal: Elife / Year: 2019
Title: A structural mechanism for phosphorylation-dependent inactivation of the AP2 complex.
Authors: Edward A Partlow / Richard W Baker / Gwendolyn M Beacham / Joshua S Chappie / Andres E Leschziner / Gunther Hollopeter /
Abstract: Endocytosis of transmembrane proteins is orchestrated by the AP2 clathrin adaptor complex. AP2 dwells in a closed, inactive state in the cytosol, but adopts an open, active conformation on the plasma ...Endocytosis of transmembrane proteins is orchestrated by the AP2 clathrin adaptor complex. AP2 dwells in a closed, inactive state in the cytosol, but adopts an open, active conformation on the plasma membrane. Membrane-activated complexes are also phosphorylated, but the significance of this mark is debated. We recently proposed that NECAP negatively regulates AP2 by binding open and phosphorylated complexes (Beacham et al., 2018). Here, we report high-resolution cryo-EM structures of NECAP bound to phosphorylated AP2. The site of AP2 phosphorylation is directly coordinated by residues of the NECAP PHear domain that are predicted from genetic screens in . Using membrane mimetics to generate conformationally open AP2, we find that a second domain of NECAP binds these complexes and cryo-EM reveals both domains of NECAP engaging closed, inactive AP2. Assays in vitro and in vivo confirm these domains cooperate to inactivate AP2. We propose that phosphorylation marks adaptors for inactivation.
History
DepositionMay 10, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 11, 2019Provider: repository / Type: Initial release
Revision 1.1Jan 8, 2020Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization

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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
S: AP-2 complex subunit sigma
N: Adaptin ear-binding coat-associated protein 2


Theoretical massNumber of molelcules
Total (without water)232,0855
Polymers232,0855
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein AP-2 complex subunit alpha-2


Mass: 69656.297 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Ap2a2, Adtab / Plasmid: PACYC_DUET / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P17427*PLUS
#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: 66953.195 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Ap2b1, Clapb1 / Plasmid: PET_DUET / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9DBG3
#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: 49806.621 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Ap2m1, Clapm1 / Plasmid: PET_DUET / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P84091
#4: 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.) Rattus norvegicus (Norway rat) / Gene: Ap2s1, Ap17, Claps2 / Plasmid: PACYC_DUET / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P62744
#5: Protein Adaptin ear-binding coat-associated protein 2 / NECAP endocytosis-associated protein 2 / NECAP-2


Mass: 28629.941 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Necap2 / Plasmid: PET-21B / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9D1J1

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: PHOSPHORYLATED AP2-NECAP CO-COMPLEX / Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightExperimental value: NO
Source (natural)Organism: Mus musculus (house mouse)
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: BL21(DE3)
Buffer solutionpH: 8
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportDetails: GLOW DISCHARGE / Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K
Details: 4 UL OF SAMPLE/GRID WAS BLOTTED FOR 4 SECONDS AND PLUNGE FROZEN IN LIQUID-NITROGEN COOLED ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 36000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 600 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 1 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of real images: 944

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Processing

EM software
IDNameCategoryImage processing-ID
1Leginonimage acquisition1
3CTFFINDCTF correction1
4GctfCTF correction1
5RELIONCTF correction1
8UCSF Chimeramodel fitting1
10RELIONinitial Euler assignment1
11RELIONfinal Euler assignment1
13RELION3D reconstruction1
18RELIONclassification2
19RELION3D reconstruction2
20Rosettamodel refinement1
Image processing
IDImage recording-ID
11
21
CTF correction
IDEM image processing-IDType
11PHASE FLIPPING AND AMPLITUDE CORRECTION
22PHASE FLIPPING AND AMPLITUDE CORRECTION
Symmetry
IDImage processing-IDEntry-IDPoint symmetry
116OWOC1 (asymmetric)
226OWOC1 (asymmetric)
3D reconstruction
IDResolution (Å)Resolution methodNum. of particlesImage processing-IDEntry-IDSymmetry type
13.2FSC 0.143 CUT-OFF7157116OWOPOINT
23.2FSC 0.143 CUT-OFF7157126OWOPOINT
Atomic model buildingB value: 63 / Protocol: RIGID BODY FIT / Space: REAL / Target criteria: MAXIMUM LIKELIHOOD
Details: STARTING MODEL WAS GENERATED BY DOCKING PDB ENTRIES 2VGL AND 1TQZ INTO CRYO-EM DENSITY AND MANUALLY EDITING SEQUENCE AND STRUCTURAl CHANGES. MODEL REFINEMENT WAS PERFORMED USING ROSETTA AND ...Details: STARTING MODEL WAS GENERATED BY DOCKING PDB ENTRIES 2VGL AND 1TQZ INTO CRYO-EM DENSITY AND MANUALLY EDITING SEQUENCE AND STRUCTURAl CHANGES. MODEL REFINEMENT WAS PERFORMED USING ROSETTA AND PHENIX.REAL_SPACE_REFINE
Atomic model building
IDPDB-ID 3D fitting-ID
12VGL

2vgl

1
21TQZ

1tqz

1
RefinementHighest resolution: 3.2 Å

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