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Camel nanobodies 7A3 and 8A2 broadly neutralize SARS-CoV-2 variants
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 10.804 f_angle_d 0.578 f_chiral_restr 0.045 f_bond_d 0.004 f_plane_restr 0.004
Sample Ternary complex of SARS-Cov-2 Spike protein ectodomain (Wuhan strain) and camel nanobodies 7A3 and 8A2. Sample Components SARS-CoV-2 Spike glycoprotein Camel nanobody 8A2 Camel nanobody 7A3
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument LEICA EM GP Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 580888 Reported Resolution (Å) 2.39 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C1
Map-Model Fitting and Refinement Id 1 Refinement Space Refinement Protocol Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 60 60
Imaging Experiment 1 2 Date of Experiment Temperature (Kelvin) Microscope Model FEI TALOS ARCTICA FEI TITAN KRIOS Minimum Defocus (nm) 1500 1500 Maximum Defocus (nm) 2200 2200 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 2.7 Imaging Mode BRIGHT FIELD BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification 45000 81000 Calibrated Magnification 53648 47348 Source FIELD EMISSION GUN FIELD EMISSION GUN Acceleration Voltage (kV) 200 300 Imaging Details
EM Software Task Software Package Version IMAGE ACQUISITION SerialEM 3.0 CTF CORRECTION cryoSPARC 3.3 MODEL REFINEMENT PHENIX INITIAL EULER ASSIGNMENT cryoSPARC 3.3 FINAL 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 1539054