ELECTRON MICROSCOPY

Sample

Human 26S proteasome

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details incubation time= 3 s blotting time= 2.5 s
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 52216
Reported Resolution (Å) 3.8
Resolution Method FSC 0.143 CUT-OFF
Other Details Performed in cryoSPARC using Non-uniform Refinment job type. Some parts of the map were then improved by using focused local refinement.
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol OTHER
Refinement Target 0.83
Overall B Value 110.45
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 49
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1200
Maximum Defocus (nm) 1800
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 70000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION Topaz ?
IMAGE ACQUISITION EPU ?
CTF CORRECTION CTFFIND 4.1
MODEL FITTING UCSF ChimeraX 1.3
MODEL REFINEMENT ISOLDE 1.3
MODEL REFINEMENT Coot 0.9.4.1 EL
MODEL REFINEMENT PHENIX 1.19.2
INITIAL EULER ASSIGNMENT RELION 3.1
FINAL EULER ASSIGNMENT cryoSPARC 3.1
CLASSIFICATION cryoSPARC 3.1
RECONSTRUCTION cryoSPARC 3.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?