ELECTRON MICROSCOPY

Sample

Closed hypernucleosome assembled from HHoB Asgard archaeal histone and DNA

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details at 20* C
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 353468
Reported Resolution (Å) 2.6
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 AB INITIO MODEL
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 39.93
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 500
Maximum Defocus (nm) 1500
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 130000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION cryoSPARC 4.4.1
IMAGE ACQUISITION SerialEM ?
MODEL FITTING UCSF ChimeraX 4.4.1
INITIAL EULER ASSIGNMENT cryoSPARC 4.4.1
FINAL EULER ASSIGNMENT cryoSPARC 4.4.1
RECONSTRUCTION cryoSPARC 4.4.1
MODEL REFINEMENT PHENIX 1.21.1
MODEL REFINEMENT Coot 0.9.8.93
MODEL REFINEMENT UCSF ChimeraX 1.7,1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?
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