ELECTRON MICROSCOPY

Sample

Staphylococcus epidermidis RP62a CRISPR short effector complex

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument SPT LABTECH CHAMELEON
Cryogen Name ETHANE
Sample Vitrification Details Grids were prepared at the National Center for CryoEM Access and Training (NCCAT) using a Chameleon (SPT Labtech) blotless system. 300 mesh nanowire grids with multi-hole pattern carbon film and a thin layer of gold coating (~ 5 nm) (SPT Labtech)were used
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 205747
Reported Resolution (Å) 4.97
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 OTHER
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type GATAN K3 (6k x 4k)
Electron Dose (electrons/Å2) 61.07
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model TFS KRIOS
Minimum Defocus (nm) 800
Maximum Defocus (nm) 2500
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification ?
Calibrated Magnification 46772
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details ?
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION Leginon ?
CTF CORRECTION cryoSPARC ?
MODEL FITTING UCSF Chimera ?
MODEL REFINEMENT PHENIX 1.18.2
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 ?