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Cryo-electron microscopy structure of a coronavirus spike glycoprotein trimer
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4KQZ experimental model PDB 4H14 experimental model PDB 3R4D
Sample Murine hepatitis virus protein S
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument GATAN CRYOPLUNGE 3 Cryogen Name ETHANE Sample Vitrification Details Blot for 3.5 seconds before plunging into liquid ethane (GATAN CRYOPLUNGE 3).
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 82000 Reported Resolution (Å) 4 Resolution Method FSC 0.143 CUT-OFF Other Details (Single particle--Applied symmetry: C3) Refinement Type Symmetry Type POINT Point Symmetry C3
Map-Model Fitting and Refinement Id 1 (4KQZ, 4H14, 3R4D) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details REFINEMENT PROTOCOL--flexible
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 53
Imaging Experiment 1 Date of Experiment 2014-12-09 Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 2000 Maximum Defocus (nm) 5000 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 22500 Calibrated Magnification 38022 Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version MODEL FITTING Coot MODEL FITTING Rosetta MODEL FITTING UCSF Chimera RECONSTRUCTION RELION
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details Each particle