ELECTRON MICROSCOPY

Sample

Type I-A CRISPR_Cas post-targeting surveillance subcomplex from Saccharolobus solfataricus

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Blot time: 4 seconds Blot force: 5
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 106678
Reported Resolution (Å) 3.07
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 FLEXIBLE FIT
Refinement Target Correlation Coefficient
Overall B Value 474
Fitting Procedure ?
Details Alphafold 3 homology model including RNA was rigid body fit into the density. DNA modeling was ab initio. After rigid body fitting iterative real-space refinement and model building with PHENIX and Coot was performed.
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 55.3
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS TALOS
Minimum Defocus (nm) 500
Maximum Defocus (nm) 2500
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 36000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC ?
IMAGE ACQUISITION SerialEM ?
CTF CORRECTION cryoSPARC ?
MODEL FITTING Coot ?
MODEL REFINEMENT PHENIX ?
INITIAL EULER ASSIGNMENT cryoSPARC ?
FINAL EULER ASSIGNMENT cryoSPARC ?
CLASSIFICATION cryoSPARC ?
RECONSTRUCTION cryoSPARC ?
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?