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The atomic model was fitted into a low resolution (5 angstrom) EM map; therefore the coordinates should only serve as a general visual representation ...
The atomic model was fitted into a low resolution (5 angstrom) EM map; therefore the coordinates should only serve as a general visual representation and should not be looked into detail. Initial docking of the atomic model was done in ChimeraX. Coot and Phenix were used for real-space refinements. Geometry minimization in Phenix was used to improve the RNA atomic model.
Data Acquisition
Detector Type
GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å**2)
50
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TALOS ARCTICA
Minimum Defocus (nm)
1000
Maximum Defocus (nm)
2000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
36000
Calibrated Magnification
Source
FIELD EMISSION GUN
Acceleration Voltage (kV)
200
Imaging Details
In order to account for highly preferred orientation of the specimen, data were acquired using tilts at -20 degrees.
EM Software
Task
Software Package
Version
PARTICLE SELECTION
cryoSPARC
IMAGE ACQUISITION
Leginon
MODEL FITTING
UCSF ChimeraX
RECONSTRUCTION
cryoSPARC
MODEL REFINEMENT
Coot
MODEL REFINEMENT
PHENIX
Image Processing
CTF Correction Type
CTF Correction Details
Number of Particles Selected
Particle Selection Details
NONE
CTF correction were performed by Patch CTF Estimation of cryoSPARC