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Cryo-EM structure of SARS-CoV-2 spike in complex with FSR22, an anti-SARS-CoV-2 DARPin (Local refinement of FSR22 and RBD)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 7BNO
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 4.592 f_angle_d 0.599 f_chiral_restr 0.041 f_plane_restr 0.007 f_bond_d 0.003
Sample DARPin FSR22 in complex with RBD of SARS-CoV-2 spike
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 18892 Reported Resolution (Å) 4.17 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT
Map-Model Fitting and Refinement Id 1 (7BNO) Refinement Space REAL Refinement Protocol RIGID BODY FIT Refinement Target CC Overall B Value 134 Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 40.2
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1250 Maximum Defocus (nm) 2500 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode BRIGHT FIELD Specimen Holder Model Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version CTF CORRECTION cryoSPARC 3.3 MODEL FITTING UCSF Chimera MODEL REFINEMENT PHENIX 1.20 INITIAL EULER ASSIGNMENT cryoSPARC 3.3 RECONSTRUCTION cryoSPARC 3.3
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 417461