7O1C
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 |