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Pre-fusion Stabilized HERV-K Envelope Trimer Ectodomain
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model Other
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 12.3491 f_angle_d 0.5265 f_chiral_restr 0.0434 f_plane_restr 0.0048 f_bond_d 0.0025
Sample Pre-fusion Stabilized HERV-K Envelope Trimer
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 81000 Reported Resolution (Å) 2.24 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C3
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol OTHER Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 50
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 800 Maximum Defocus (nm) 2000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS 2.7 Imaging Mode OTHER Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.6.0 IMAGE ACQUISITION EPU CTF CORRECTION cryoSPARC 4.6.0 MODEL FITTING UCSF ChimeraX 1.7.1 MODEL FITTING Coot 0.9.8.93 MODEL REFINEMENT PHENIX 1.21.1_5286 INITIAL EULER ASSIGNMENT cryoSPARC 4.6.0 FINAL EULER ASSIGNMENT cryoSPARC 4.6.0 CLASSIFICATION cryoSPARC 46.0 RECONSTRUCTION cryoSPARC 4.6.0
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details NONE 1640558