6D6R
Human nuclear exosome-MTR4 RNA complex - composite map after focused reconstruction
ELECTRON MICROSCOPY
| Sample |
|---|
| Human nuclear exosome-MTR4 helicase captured after unwinding a DNA/RNA substrate |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 30 sec wait time, 2.5 sec blot time |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 122703 |
| Reported Resolution (Å) | 3.45 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Focused refinements with five strategies required to achieve final model |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | BACKBONE TRACE | ||||
| Refinement Target | Correlation coefficient | ||||
| Overall B Value | 73.6 | ||||
| Fitting Procedure | |||||
| Details | Models were rebuilt manually using Coot, with real space refinement with local scaling followed by Phenix real space refinement with suboptimal global ... | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 85.23 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | |
| Maximum Defocus (nm) | |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| IMAGE ACQUISITION | Leginon | 3.2 |
| CTF CORRECTION | Gctf | 1.06 |
| CTF CORRECTION | RELION | 2.1.b1 |
| MODEL FITTING | PHENIX | 1.13-2998 |
| MODEL FITTING | Coot | 0.8.9 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 0.6.1 |
| FINAL EULER ASSIGNMENT | RELION | 2.1b1 |
| CLASSIFICATION | RELION | 2.1b1 |
| RECONSTRUCTION | RELION | 2.1b1 |
| MODEL REFINEMENT | PHENIX | 1.13-2998 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 278185 | |||
