ELECTRON MICROSCOPY
| Sample |
|---|
| AngV-F protein trimer in pre-fusion conformation |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | LEICA EM GP |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Protein sample was applied to the grid and incubated for 30 seconds at >95% humidity. Excess protein was blotted away for 2.5 seconds before being plu ... |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 1106722 |
| Reported Resolution (Å) | 4.03 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Non-uniform refinement used for the final reconstruction |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | |||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K3 (6k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 28 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS KRIOS |
| Minimum Defocus (nm) | 1700 |
| Maximum Defocus (nm) | 2800 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
| Nominal Magnification | 81000 |
| Calibrated Magnification | 81000 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details | Grid screening was performed manually |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | v4.5.3 |
| CTF CORRECTION | cryoSPARC | v4.5.3 |
| MODEL FITTING | UCSF ChimeraX | 1.6.1 |
| CLASSIFICATION | cryoSPARC | v4.5.3 |
| RECONSTRUCTION | cryoSPARC | v4.5.3 |
| MODEL REFINEMENT | PHENIX | 1.21.1_5286 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| NONE | Micrographs were curated through contrast transfer function (CTF) where greater than 30 angstrom were discarded | 13247526 | Particles were picked using automated blob picker and extracted | |
