2026-01-21 REL PDBe PDBe PDBe 2025-06-02 2025-11-26 2025-11-26 2026-01-21 Biotechnology and Biological Sciences Research Council (BBSRC) BB/M011151/1 United Kingdom European Research Council (ERC) 715968 European Union Science Foundation Ireland 15/YI/3187 Ireland Irish Research Council GOID/2019-812 Ireland UK Research and Innovation (UKRI) MR/V022644/1 United Kingdom Wellcome Trust 108466/Z/15/Z & 221524/Z/20/Z United Kingdom Wellcome Trust 208395/Z/17/Z United Kingdom Memory engram synapse 3D molecular architecture visualized by cryoCLEM-guided cryoET Frank RAW Lovatt CA Synapse, Engram, In Situ, In Tissue, CEMOVIS, cryo-section, CELL ADHESION Lovatt C O'Sullivan T Ortega-de San Luis C Ryan TJ Frank RAW Memory engram synapse 3D macromolecular architecture visualized by cryoCLEM-guided cryoET. Structure UK 34 100 112.e3 2026 41240908 doi:10.1016/j.str.2025.10.014 0969-2126 2005 STRUE6 Lovatt CA O'Sullivan TJ Ortega-de San Luis C Ryan T Frank RAW Memory engram synapse 3D molecular architecture visualized by cryoCLEM-guided cryoET To Be Published 39829918 doi:10.1101/2025.01.09.632151 0353 EMDB EMD-53931 associated EM volume Macromolecular resolution of synapses between engram cells within tissue Macromolecular resolution of synapses between engram cells within tissue 0
cryoCLEM-targeted engram-labelled synapses
Mus musculus C57B16/J Brain Brain tomography tissue 7.3 23.25 NMDG n-methyl-d-glucamine 0.625 KCl Potassium chloride 0.3 NaH2PO4 Socium Phosphate 7.5 NaHCO3 Sodium carbonate 5.0 HEPES HEPES 6.25 C6H12O6 Glucose 1.25 C6H7O6Na Ascorbic acid 0.5 CH4N2S Thiourea 0.75 C3H3NaO3 Sodium Pyruvate 2.5 MgSO4.7H2O Magnesium Sulphate 0.125 CaCl2.2H2O Calcium chloride
pH 7.2-7.4, 304-310 mOsm
 Quantifoil R3.5/1 COPPER 200 CARBON HOLEY GLOW DISCHARGE AIR
High pressure frozen brain tissue with 20% dextran cryoprotectant
OTHER
3 mm diameter, 100 um thick carriers. 20% dextran cryoprotectant.. The value given for _em_high_pressure_freezing.instrument is Leica EM ICE. This is not in a list of allowed values {'LEICA EM PACT2', 'LEICA EM HPM100', 'EMS-002 RAPID IMMERSION FREEZER', 'LEICA EM PACT', 'OTHER', 'BAL-TEC HPM 010'} so OTHER is written into the XML file.
 20% dextran Leica EM UC7 113 100
High pressure frozen tissue carriers were loaded into Leica UC7 cryo-ultramicrotome and tissue ribbons were collected at 100-190 nm thickness.
 TFS KRIOS FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 300 100.0 2.7 5.0 5.0 8.0 8.0 NITROGEN TFS Selectris 20 FEI FALCON IV (4k x 4k) 3 3 4 2867 2.0 109.0 1
Tilt series were reconstructed in imod and tomograms were denoised in isonet
SIMULTANEOUS ITERATIVE (SIRT) IMOD 4.9 UCSF ChimeraX 1.8 2396 PHASE FLIPPING AND AMPLITUDE CORRECTION emd_53931.map.gz 1 IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) 1024 1024 400 0 0 0 1024 1024 400 12288.0 12288.0 4800.0 90.0 90.0 90.0 X Y Z -82.238174000000001 12.668004 -6.706597 3.284889 12.0 12.0 12.0 AUTHOR Representative tomographic volume of engram labelled synapse