3JAM
CryoEM structure of 40S-eIF1A-eIF1 complex from yeast
ELECTRON MICROSCOPY
Starting Model(s)
Initial Refinement Model(s) | |||
---|---|---|---|
Type | Source | Accession Code | Details |
experimental model | PDB | 3J80 |
Sample |
---|
Initiation factors eIF1A and eIF1 bound to the 40S ribosome |
Sample Components |
Ribosome small subunit 40S |
Eukaryotic initiation factor eIF1A |
Eukaryotic initiation factor eIF1 |
Specimen Preparation | |
---|---|
Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK I |
Cryogen Name | ETHANE |
Sample Vitrification Details | Blot for 2.5 to 3 seconds before plunging into liquid ethane (FEI VITROBOT MARK I). |
3D Reconstruction | |
---|---|
Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 86055 |
Reported Resolution (Å) | 3.46 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | gold-standard |
Refinement Type | HALF-MAPS REFINED INDEPENDENTLY |
Symmetry Type | POINT |
Point Symmetry | C1 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 (3J80) | ||||
Refinement Space | RECIPROCAL | ||||
Refinement Protocol | OTHER | ||||
Refinement Target | R-factor, FSC | ||||
Overall B Value | 89 | ||||
Fitting Procedure | |||||
Details | METHOD--Local refinement |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | FEI FALCON II (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 27 |
Imaging Experiment | 1 |
---|---|
Date of Experiment | 2014-04-28 |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 1500 |
Maximum Defocus (nm) | 4000 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 2.7 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | |
Nominal Magnification | 78000 |
Calibrated Magnification | 104478 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details | Complete dataset was collected over two non-consecutive days. |
EM Software | ||
---|---|---|
Task | Software Package | Version |
MODEL FITTING | Coot | |
MODEL FITTING | REFMAC | |
MODEL FITTING | UCSF Chimera | |
RECONSTRUCTION | RELION |