Structure of human 48S translation initiation complex in AUG recognition state after eIF5-induced GTP hydrolysis by eIF2 (48S-2)
ELECTRON MICROSCOPY
Sample |
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Human 48S initiation complex 40S-eIF1A-eIF2-eIF3-eIF5-tRNA-Met-mRNA |
Sample Components |
Human 48S initiation complex |
mRNA, 18S rRNA, Eukaryotic translation initiation factor 1A, X-chromosomal, Initiator Met-tRNA-i and Eukaryotic translation initiation factor 5 |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | HOMEMADE PLUNGER |
Cryogen Name | ETHANE |
Sample Vitrification Details | Manual blotting & plunge-freezing |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 61742 |
Reported Resolution (Å) | 3.4 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | POINT |
Map-Model Fitting and Refinement | |||||
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Id | 1 | ||||
Refinement Space | |||||
Refinement Protocol | |||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
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Detector Type | FEI FALCON III (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 45 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 200 |
Maximum Defocus (nm) | 2500 |
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 | Electron-optical aberrations were corrected using a CETCOR Cs-corrector (CEOS, Heidelberg) aligned with the CETCORPLUS 4.6.9 software package (CEOS, Heidelberg). |
EM Software | ||
---|---|---|
Task | Software Package | Version |
PARTICLE SELECTION | Gautomatch | 0.56 |
IMAGE ACQUISITION | EPU | 2.3 |
CTF CORRECTION | Gctf | 1.0.6 |
MODEL FITTING | UCSF ChimeraX | 1.4 |
INITIAL EULER ASSIGNMENT | RELION | 4.0 |
FINAL EULER ASSIGNMENT | RELION | 4.0 |
RECONSTRUCTION | RELION | 4.0 |
MODEL REFINEMENT | Coot | 0.9.8.1 |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION |