3JCK

Structure of the yeast 26S proteasome lid sub-complex

ELECTRON MICROSCOPY

Sample
Recombinant yeast 26S proteasome lid complex
Sample Components
26S proteasome lid sub-complex

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	HOMEMADE PLUNGER
Cryogen Name	ETHANE
Sample Vitrification Details	4 uL sample was applied to the grid, blotted for 2 seconds at 4 degrees C, and plunged into liquid ethane using a manual plunger.

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	109396
Reported Resolution (Å)	3.5
Resolution Method	FSC 0.143 CUT-OFF
Other Details	3D classification was performed to identify the best 109,396 particles from an initial dataset of 254,112. An ensemble of five models is provided. Ea ...	3D classification was performed to identify the best 109,396 particles from an initial dataset of 254,112. An ensemble of five models is provided. Each model is an approximately equivalent representation of the structure. (Single particle details: Image pre-processing was performed using Appion. 3D classification and reconstruction was performed with RELION.) (Single particle--Applied symmetry: C1)
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 (4k x 4k)
Electron Dose (electrons/Å**2)	43.8

Imaging Experiment	1
Date of Experiment	2015-02-10
Temperature (Kelvin)	87.5
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	1600
Maximum Defocus (nm)	3200
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	22500
Calibrated Magnification	38168
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details	Micrograph was collected in super-resolution mode with a total frame count of 38 and total exposure time of 7.6 seconds.

EM Software
Task	Software Package	Version
CTF CORRECTION	CTFFIND	3
PARTICLE SELECTION	FindEM
RECONSTRUCTION	Appion
RECONSTRUCTION	RELION

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	whole micrograph

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.