Structural insights into cognate vs. near-cognate discrimination during decoding.
ELECTRON MICROSCOPY
| Sample |
|---|
| Near-cognate 70S-TC complex |
| Sample Components |
| small ribosomal subunit |
| A/T-site tRNA |
| elongation factor Tu |
| messenger RNA |
| P-site tRNA |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK I |
| Cryogen Name | NITROGEN |
| Sample Vitrification Details | |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 26873 |
| Reported Resolution (Å) | 13.2 |
| Resolution Method | |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (2I2U) | 2 (3FIH) | |||
| Refinement Space | REAL | REAL | |||
| Refinement Protocol | FLEXIBLE FIT | FLEXIBLE FIT | |||
| Refinement Target | RMSD < 0.1 A/ns | RMSD < 0.1 A/ns | |||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | METHOD--flexible fitting, MDFF | METHOD--flexible fitting, MDFF | |||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | TVIPS TEMCAM-F415 (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 20 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TECNAI F30 |
| Minimum Defocus (nm) | 1200 |
| Maximum Defocus (nm) | 4000 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 59000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| MODEL FITTING | NAMD | 2.7 |
| RECONSTRUCTION | SPIDER | 2.7 |
