ELECTRON MICROSCOPY

Sample

Structure of the U11 snRNP core

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 268233
Reported Resolution (Å) 3.1
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol RIGID BODY FIT
Refinement Target Cross-correction coefficient
Overall B Value 71.2
Fitting Procedure ?
Details refinement is done in Phenix
Data Acquisition
Detector Type FEI FALCON IV (4k x 4k)
Electron Dose (electrons/Å2) 41.73
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 700
Maximum Defocus (nm) 1700
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 ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Preliminary grid screening was performed on Glacios.
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC v4.3.1
IMAGE ACQUISITION SerialEM ?
MODEL FITTING UCSF ChimeraX 1.6.1
INITIAL EULER ASSIGNMENT cryoSPARC v4.3.1
FINAL EULER ASSIGNMENT cryoSPARC v4.3.1
CLASSIFICATION cryoSPARC v4.3.1
RECONSTRUCTION cryoSPARC v4.3.1
MODEL REFINEMENT PHENIX 1.20.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
NONE ?