Cryo-EM structure of an Escherichia coli TnaC(R23F)-ribosome-RF2 complex stalled in response to L-tryptophan
ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 6TBV | |
| Sample |
|---|
| 70S ribosome stalled during translation of TnaC(R23F) with Pro24 in the P-site and release factor 2 in the A-site. |
| Sample Components |
| 30S subunit |
| 50S subunit |
| P-site tRNA-Pro - TnaC-(R23F) nascent chain |
| mRNA |
| Peptide chain release factor RF2 |
| 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 | 113840 |
| Reported Resolution (Å) | 2.6 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (6TBV) | ||||
| Refinement Space | |||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 SUMMIT (4k x 4k) | GATAN K2 SUMMIT (4k x 4k) | |||||||
| Electron Dose (electrons/Å**2) | 40 | 44 | |||||||
| Imaging Experiment | 1 | 2 |
|---|---|---|
| Date of Experiment | ||
| Temperature (Kelvin) | ||
| Microscope Model | FEI TALOS ARCTICA | FEI TITAN KRIOS |
| Minimum Defocus (nm) | -1000 | -400 |
| Maximum Defocus (nm) | -2000 | -1600 |
| Minimum Tilt Angle (degrees) | ||
| Maximum Tilt Angle (degrees) | ||
| Nominal CS | 2.7 | 2.7 |
| Imaging Mode | BRIGHT FIELD | BRIGHT FIELD |
| Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER | |
| Nominal Magnification | 45000 | 165000 |
| Calibrated Magnification | 55127 | 59880 |
| Source | FIELD EMISSION GUN | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | RELION | 3.1 |
| CTF CORRECTION | RELION | 3.1 |
| MODEL FITTING | UCSF Chimera | 1.1.1 |
| MODEL REFINEMENT | ISOLDE | 1.093 |
| MODEL REFINEMENT | PHENIX | 1.19.2 |
| MODEL REFINEMENT | Coot | |
| 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 | 1739950 | |||
