Cryo-EM reconstruction of the native 24-mer E2o core of the 2-oxoglutarate dehydrogenase complex of C. thermophilum at 3.35 A resolution
ELECTRON MICROSCOPY
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 7Q5Q | |
| Sample |
|---|
| Native 24-mer core of Oxoglutarate Dehydrogenase Complex |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | For plunging, blot force 0 and blotting time of 4 sec were applied. |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 69028 |
| Reported Resolution (Å) | 3.35 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Particles were symmetry expanded for the final reconstruction, then local reconstruction was performed without symmetry application. |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | O |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (7Q5Q) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | Initial fitting was performed in ChimeraX v1.2, then real-space refined in PHENIX v1.19 | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON III (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 30 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS GLACIOS |
| Minimum Defocus (nm) | 800 |
| Maximum Defocus (nm) | 2000 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | OTHER |
| Nominal Magnification | 92000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 3.1 |
| IMAGE ACQUISITION | EPU | 2.6 |
| CTF CORRECTION | cryoSPARC | 3.1 |
| MODEL FITTING | UCSF ChimeraX | 1.2 |
| MODEL REFINEMENT | PHENIX | 1.19 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | 3.1 |
| FINAL EULER ASSIGNMENT | cryoSPARC | 3.1 |
| CLASSIFICATION | cryoSPARC | 3.1 |
| RECONSTRUCTION | cryoSPARC | 3.1 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 1300 | Template picking was directly applied | ||
