Cryo-EM structure of yeast mitochondrial RNA polymerase transcription initiation complex with 7-mer RNA, pppGpGpUpApApApU (IC7)
ELECTRON MICROSCOPY
| Sample |
|---|
| yeast mitochondrial RNA polymerase transcription initiation complex with 7-mer RNA, pppGpGpUpApApApu (IC7) |
| Sample Components |
| DNA-directed RNA polymerase, mitochondrial |
| DNA (37-mer) |
| Mitochondrial transcription factor 1 |
| RNA (pppGpGpUpApApApu) |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | LEICA EM GP |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 3 ul sample, back blotting for 12 seconds |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 96741 |
| Reported Resolution (Å) | 3.75 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | correlation coefficient | ||||
| Overall B Value | 144 | ||||
| Fitting Procedure | |||||
| Details | Realspace refinement | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON III (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 40 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS GLACIOS |
| Minimum Defocus (nm) | 800 |
| Maximum Defocus (nm) | 1800 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | OTHER |
| Nominal Magnification | 150000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | RELION | 3.1 |
| IMAGE ACQUISITION | EPU | 2.9.0 |
| CTF CORRECTION | CTFFIND | 4 |
| MODEL FITTING | Coot | |
| INITIAL EULER ASSIGNMENT | RELION | 3.1 |
| FINAL EULER ASSIGNMENT | RELION | 3.1 |
| CLASSIFICATION | RELION | 3.1 |
| RECONSTRUCTION | RELION | 3.1 |
| MODEL REFINEMENT | PHENIX | 1.19 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| NONE | 641911 | |||
