Experiment: 8ANW

Poliovirus type 3 (strain Saukett) stabilised virus-like particle (PV3 SC8).

ELECTRON MICROSCOPY

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6Z6W

Refinement

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	11.589
f_angle_d	0.485
f_chiral_restr	0.043
f_plane_restr	0.004
f_bond_d	0.002

Sample
Human poliovirus 3

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE-PROPANE
Sample Vitrification Details	Double blotting with 4 ul of sample, followed by 4 second blot, before plunging.

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	2712
Reported Resolution (Å)	2.7
Resolution Method	FSC 0.143 CUT-OFF
Other Details	Final reconstruction was sharpened with Post-processing in RELION using an inverse B-factor of -69.1 Angstroms.
Refinement Type
Symmetry Type	POINT
Point Symmetry	I

Map-Model Fitting and Refinement
Id	1 (6Z6W)
Refinement Space	REAL
Refinement Protocol	RIGID BODY FIT
Refinement Target	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 pheni ...	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/Å**2)	35

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	900
Maximum Defocus (nm)	2400
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	165000
Calibrated Magnification	60975
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	crYOLO	1.5.6
IMAGE ACQUISITION	SerialEM
CTF CORRECTION	CTFFIND	4.0
MODEL FITTING	UCSF Chimera	1.14
INITIAL EULER ASSIGNMENT	RELION	3.1.1
FINAL EULER ASSIGNMENT	RELION	3.1.1
CLASSIFICATION	RELION	3.1.1
RECONSTRUCTION	RELION	3.1.1
MODEL REFINEMENT	PHENIX	1.19.2-4158-000

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		10744