6EPE

Substrate processing state 26S proteasome (SPS2)

ELECTRON MICROSCOPY

Sample
Substrate processing state 26S proteasome (SPS2)

Specimen Preparation
Sample Aggregation State	CELL
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE-PROPANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SUBTOMOGRAM AVERAGING
Number of Particles	3482
Reported Resolution (Å)	12.8
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	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)	1.8

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	5000
Maximum Defocus (nm)	7000
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	42000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
VOLUME SELECTION	PyTom
VOLUME SELECTION	TOM Toolbox
VOLUME SELECTION	RELION	1.4
IMAGE ACQUISITION	SerialEM
CTF CORRECTION	CTFFIND
CTF CORRECTION	RELION	1.4
MODEL FITTING	MDFF
FINAL EULER ASSIGNMENT	RELION	1.4
CLASSIFICATION	RELION	1.4
RECONSTRUCTION	RELION	1.4

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

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.