ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 7K00 | |
| Sample |
|---|
| 70S initiation complex (tRNA-fMet M1 + CUG start codon) |
| Specimen Preparation | |
|---|---|
| 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 | 132954 |
| Reported Resolution (Å) | 2.63 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | cryoSPARC homogeneous 3D refinement |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (7K00) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | 64.9 | ||||
| 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 PHENI ... | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 BIOQUANTUM (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 58.4 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (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 |
| EM Software | ||
|---|---|---|
| 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 | 835144 | ||
