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Cryo-EM structure of S protein trimer of SARS-CoV2
Sample Minor cryo-EM structure of S protein trimer of SARS-CoV2
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument Cryogen Name ETHANE Sample Vitrification Details Embedding Material amorphous ice Embedding Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 14235 Reported Resolution (Å) 6.9 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 FLEXIBLE FIT Refinement Target Overall B Value 415 Fitting Procedure Details
Data Acquisition Detector Type DIRECT ELECTRON DE-20 (5k x 3k) Electron Dose (electrons/Å**2) 20
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model JEOL 2200FS Minimum Defocus (nm) 2000 Maximum Defocus (nm) 4000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 4.2 Imaging Mode BRIGHT FIELD Specimen Holder Model GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER Nominal Magnification 40000 Calibrated Magnification 45065 Source FIELD EMISSION GUN Acceleration Voltage (kV) 200 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION RELION 3.1 CTF CORRECTION CTFFIND 4 MODEL FITTING Coot 0.8.2 INITIAL EULER ASSIGNMENT RELION 3.1 FINAL EULER ASSIGNMENT RELION 3.1 CLASSIFICATION RELION 3.1 RECONSTRUCTION RELION 3.1 MODEL REFINEMENT PHENIX 1.13
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING ONLY