9F59

ELECTRON MICROSCOPY

Sample

Poliovirus 2

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE-PROPANE
Sample Vitrification Details 4 ul of sample blotted for 3.5 seconds with -15 blot force on FEI Vitrobot mark IV.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 18378
Reported Resolution (Å) 2.3
Resolution Method FSC 0.143 CUT-OFF
Other Details Icosahedral symmetry applied to final reconstruction. Final maps were post-processed with an inverse B-factor of -67.7 Angstrom squared.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target Cross-correlation coefficient
Overall B Value ?
Fitting Procedure ?
Details Initial model was rigid body fitted using UCSF chimera and Coot. Global minimization and B-factor refinement was performed in real space using phenix_real.space.refine.
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 39.08
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2900
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 2.7
Imaging Mode DARK FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification ?
Calibrated Magnification 47393
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Preliminary grid screening was performed on a Glacios 200 kV microscope.
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 4.2.1
CTF CORRECTION cryoSPARC 4.2.1
MODEL FITTING UCSF Chimera 1.16
MODEL FITTING Coot 0.9.6
INITIAL EULER ASSIGNMENT cryoSPARC 4.2.1
FINAL EULER ASSIGNMENT cryoSPARC 4.2.1
CLASSIFICATION cryoSPARC 4.2.1
RECONSTRUCTION cryoSPARC 4.2.1
MODEL REFINEMENT PHENIX 1.20.1_4487-000
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION CTF correction performed using the Patch CTF job in cryoSPARC.