ELECTRON MICROSCOPY

Sample

Human 48S initiation complex 40S-eIF1-eIF1A-eIF2-eIF3-tRNA-Met-mRNA

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details Cryo-EM grids were prepared by floating home-made continuous carbon on 40 ul sample in the wells of teflon block (custom-made). The sample-covered carbon was then adsorbed to an EM grid.
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 57184
Reported Resolution (Å) 4.7
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 RSCC
Overall B Value ?
Fitting Procedure ?
Details ?
Data Acquisition
Detector Type FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å2) 48
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1500
Maximum Defocus (nm) 4000
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS 0.01
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 59000
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details Aberration corrections performed using Cs image corrector (CEOS company)
Imaging Experiment
Task Software Package Version
IMAGE ACQUISITION EPU ?
CTF CORRECTION Gctf ?
MODEL FITTING Coot 0.9.4
MODEL FITTING UCSF ChimeraX 1.2
MODEL REFINEMENT ISOLDE 1.1
MODEL REFINEMENT Coot 0.9.4
MODEL REFINEMENT UCSF ChimeraX 1.2
INITIAL EULER ASSIGNMENT RELION 3.1
FINAL EULER ASSIGNMENT RELION 3.1
CLASSIFICATION RELION 3.1
RECONSTRUCTION RELION 3.1
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?