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Cryo-EM structure of SARS-CoV-2 ORF3a
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 18.0091 f_angle_d 0.7832 f_chiral_restr 0.0619 f_plane_restr 0.0077 f_bond_d 0.0059
Sample ORF3a in MSPE3D1 nanodisc
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details 1 blot force, 5 second wait time, 3 second blot time
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 185871 Reported Resolution (Å) 2.9 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C2
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol OTHER Refinement Target Overall B Value 108.61 Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 50.675
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TALOS ARCTICA Minimum Defocus (nm) Maximum Defocus (nm) 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) 200 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION Topaz CTF CORRECTION CTFFIND 4.1 MODEL FITTING Coot 0.9-pre INITIAL EULER ASSIGNMENT cryoSPARC 2 FINAL EULER ASSIGNMENT cryoSPARC 2 CLASSIFICATION cryoSPARC RECONSTRUCTION cryoSPARC 2 MODEL REFINEMENT PHENIX 1.17.1-3660
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 4134279