ELECTRON MICROSCOPY

Sample

Structure of a SARS-CoV-2 spike S2 subunit in a pre-fusion, open conformation in complex with the 6C10 Fab

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details 6 seconds blotting time at force 0
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 408064
Reported Resolution (Å) 2.93
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol OTHER
Refinement Target Cross-correlation coefficient
Overall B Value 150
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 50
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 600
Maximum Defocus (nm) 1800
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 75000
Calibrated Magnification 75757
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION Warp 1.09
IMAGE ACQUISITION EPU 2.12
CTF CORRECTION Warp 1.09
INITIAL EULER ASSIGNMENT cryoSPARC 4.0
FINAL EULER ASSIGNMENT cryoSPARC 4.0
CLASSIFICATION cryoSPARC 4.0
RECONSTRUCTION cryoSPARC 4.0
MODEL REFINEMENT PHENIX 1.20.1_4487:1.21
MODEL REFINEMENT Coot 0.9.5
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?