ELECTRON MICROSCOPY

Sample

70S initiation complex (tRNA-fMet M1 + GUG start codon)

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details ?
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 149231
Reported Resolution (Å) 2.61
Resolution Method FSC 0.143 CUT-OFF
Other Details cryoSPARC homogeneous 3D refinement
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol FLEXIBLE FIT
Refinement Target ?
Overall B Value 64.3
Fitting Procedure ?
Details Starting model was fit into the unsharpened 3D reconstruction in UCSF ChimeraX before performing real-space refinement with the sharpened map in PHENIX
Data Acquisition
Detector Type GATAN K3 BIOQUANTUM (6k x 4k)
Electron Dose (electrons/Å2) 58.4
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TALOS ARCTICA
Minimum Defocus (nm) 600
Maximum Defocus (nm) 1800
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 79000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 200
Imaging Details ?
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION Topaz 0.2.5
IMAGE ACQUISITION EPU ?
CTF CORRECTION cryoSPARC 4.5.3
MODEL FITTING UCSF ChimeraX 1.8
INITIAL EULER ASSIGNMENT cryoSPARC 4.5.3
FINAL EULER ASSIGNMENT cryoSPARC 4.5.3
CLASSIFICATION cryoSPARC 4.5.3
RECONSTRUCTION cryoSPARC 4.5.3
MODEL REFINEMENT PHENIX 1.20.1-4487-000
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION cryoSPARC patch CTF estimation