ELECTRON MICROSCOPY

Sample

Activated wild-type filamentous SgrAI endonuclease with Mg2+ and cleaved primary site DNA

Specimen Preperation
Sample Aggregation State FILAMENT
Vitrification Instrument HOMEMADE PLUNGER
Cryogen Name ETHANE
Sample Vitrification Details Cryo-EM grids were prepared by freezing using a manual plunger in cold room at 4C
3D Reconstruction
Reconstruction Method HELICAL
Number of Particles 202664
Reported Resolution (Å) 3.05
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type HELICAL
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target Correlation coefficient
Overall B Value 87.9
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 29.6
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2000
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 60240
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION Leginon ?
CTF CORRECTION cryoSPARC ?
MODEL FITTING Coot ?
MODEL REFINEMENT PHENIX ?
INITIAL EULER ASSIGNMENT cryoSPARC ?
FINAL EULER ASSIGNMENT RELION 4.2
RECONSTRUCTION cryoSPARC 4.2
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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