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- EMDB-52343: Native intermediate synaptic vesicle tether, likely Munc13 -

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Basic information

Entry
Database: EMDB / ID: EMD-52343
TitleNative intermediate synaptic vesicle tether, likely Munc13
Map dataIntermediate tether average
Sample
  • Organelle or cellular component: Synaptosome
KeywordsMunc13 Presynaptic Synaptic vesicle tether Active zone complex Synaptic vesicle priming Synaptic transmission / EXOCYTOSIS
Biological speciesMus musculus (house mouse)
Methodsubtomogram averaging / cryo EM / Resolution: 35.1 Å
AuthorsLucic V / Oroczo-Borunda DH
Funding support France, 1 items
OrganizationGrant numberCountry
Human Frontier Science Program (HFSP)RGP0020/2019 France
Citation
Journal: To Be Published
Title: Native intermediate synaptic vesicle tether, likely Munc13
Authors: Lucic V / Oroczo-Borunda DH
#1: Journal: To Be Published
Title: Munc13- and SNAP25-dependent molecular bridges play a key role in synaptic vesicle priming. DOI: 10.1126/sciadv.adf6222. PubMed ID: 37343100
Authors: Papantoniou C / Laugks U / Betzin J / Capitanio C / Ferrero JJ / Sanchez-Prieto J / Schoch S / Brose N / Baumeister W / Cooper BH / Imig C / Lucic V
History
DepositionDec 16, 2024-
Header (metadata) releaseDec 24, 2025-
Map releaseDec 24, 2025-
UpdateDec 24, 2025-
Current statusDec 24, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

Downloads & links

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Map

FileDownload / File: emd_52343.map.gz / Format: CCP4 / Size: 1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationIntermediate tether average
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
8.78 Å/pix.
x 64 pix.
= 561.92 Å
8.78 Å/pix.
x 64 pix.
= 561.92 Å
8.78 Å/pix.
x 64 pix.
= 561.92 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 8.78 Å
Density
Contour LevelBy AUTHOR: 0.052
Minimum - Maximum-0.5764185 - 0.64187783
Average (Standard dev.)0.0010648075 (±0.026825009)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions646464
Spacing646464
CellA=B=C: 561.92 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Intermediate tether average without vesicle and plasma membrane...

Fileemd_52343_additional_1.map
AnnotationIntermediate tether average without vesicle and plasma membrane contributions
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: Half 1

Fileemd_52343_half_map_1.map
AnnotationHalf 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Half map: Half 2

Fileemd_52343_half_map_2.map
AnnotationHalf 2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

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Sample components

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Entire : Synaptosome

EntireName: Synaptosome
Components
  • Organelle or cellular component: Synaptosome

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Supramolecule #1: Synaptosome

SupramoleculeName: Synaptosome / type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: #1 / Details: Synaptosomal fraction from rodent Hippocampus
Source (natural)Organism: Mus musculus (house mouse) / Strain: C57 B6/N / Organ: brain / Tissue: hippocampus / Location in cell: excitatory synapse
Molecular weightTheoretical: 196 KDa

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Experimental details

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Structure determination

Methodcryo EM
Processingsubtomogram averaging
Aggregation statecell

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Sample preparation

Concentration0.4 mg/mL
BufferpH: 7.4 / Component - Concentration: 300.0 mM / Component - Formula: HBM / Component - Name: Hepes-buffered medium
Details: 140 mM NaCl, 5 mM KCl, 5mM NaHCO3, 1.2 mM NaH2PO4-H2O, 1 mM MgCl26-H2O, 10 mM Glucose, 10 mM Hepes, 1.2 mM CaCl2
GridModel: Quantifoil Active R2/1 / Material: GOLD / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Time: 120 sec.
VitrificationCryogen name: ETHANE / Instrument: HOMEMADE PLUNGER
Details: Portable manual plunger made at Max Planck Institute of Biochemistry.
DetailsSynaptosomal fraction (P2) was obtained from DIV 28-30 hippocampal organotypic slices.

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsPhase plate: VOLTA PHASE PLATE / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 1.5 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.0 µm / Nominal defocus min: 0.5 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 35.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.0) / Number subtomograms used: 441
ExtractionNumber tomograms: 77 / Number images used: 760 / Method: Hierarchical connectivity / Software - details: Pyto 1.10
Details: Automatically detected bridges between synaptic vesicles and plasma membrane by hierarchical connectivity algorithm implemented in Pyto software
CTF correctionType: NONE
Final 3D classificationNumber classes: 1 / Avg.num./class: 441 / Software - details: Pyto 1.10
Details: No 3D classification was done. Instead, before particle extraction, all intermediate tethers (760 in total) detected in tomograms were classified by a feature-based deep neuronal network ...Details: No 3D classification was done. Instead, before particle extraction, all intermediate tethers (760 in total) detected in tomograms were classified by a feature-based deep neuronal network into three classes. The class used for refinement and reconstruction contained 441 particles
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.0)
FSC plot (resolution estimation)

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