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The 20S supercomplex engaging the SNAP-25 N-terminus (class 1)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 3J96
Sample 20S supercomplex consisting of soluble neuronal SNARE complex, alpha-SNAP, and N-ethylmaleimide sensitive factor (NSF) Sample Components N-ethylmaleimide sensitive factor Synaptosomal-associated protein 25 Syntaxin-1A Vesicle-associated membrane protein 2 Alpha-soluble NSF attachment protein
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK I Cryogen Name ETHANE Sample Vitrification Details Blot for 3.5 seconds before plunging.
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 55150 Reported Resolution (Å) 4.4 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 (3J96) Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 58
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1500 Maximum Defocus (nm) 3000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION SerialEM CTF CORRECTION RELION 2.1 MODEL FITTING PHENIX MODEL FITTING Coot MODEL REFINEMENT PHENIX MODEL REFINEMENT Coot INITIAL EULER ASSIGNMENT RELION 2.1 FINAL EULER ASSIGNMENT RELION 2.1 CLASSIFICATION RELION 2.1 RECONSTRUCTION RELION 2.1
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION CTF correction was carried out in Relion with reconstruction step. 475680