Focused refinement of Rhodospirillum rubrum encapsulated ferritin within the encapsulin nanocompartment
ELECTRON MICROSCOPY
Refinement
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| f_dihedral_angle_d | 2.8958 |
| f_angle_d | 0.4461 |
| f_chiral_restr | 0.0353 |
| f_plane_restr | 0.0037 |
| f_bond_d | 0.0026 |
| Sample |
|---|
| Rhodospirillum rubrum encapsulated ferritin |
| Sample Components |
| Rhodospirillum rubrum encapsulated ferritin |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 4 uL of sample was applied to the grids, which were then blotted 100% humidity blot force 5 wait time 10 s blot time 3 seconds |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 272846 |
| Reported Resolution (Å) | 2.9 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | Final reconstruction performed by local refinement of aligned encapsulated ferritin decamers from custom symmetry expansion. |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | D5 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | OTHER | ||||
| Refinement Target | Cross-correlation coefficient | ||||
| Overall B Value | 146.6 | ||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON IV (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 50 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | |
| Temperature (Kelvin) | |
| Microscope Model | TFS GLACIOS |
| Minimum Defocus (nm) | 600 |
| Maximum Defocus (nm) | 1600 |
| 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 | |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | cryoSPARC | 4.7 |
| IMAGE ACQUISITION | EPU | |
| CTF CORRECTION | cryoSPARC | |
| MODEL FITTING | UCSF ChimeraX | 9.03 |
| INITIAL EULER ASSIGNMENT | cryoSPARC | |
| FINAL EULER ASSIGNMENT | cryoSPARC | |
| CLASSIFICATION | cryoSPARC | |
| RECONSTRUCTION | cryoSPARC | 4.7 |
| MODEL REFINEMENT | PHENIX | 1.21.2_5419 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING AND AMPLITUDE CORRECTION | 346315 | Particles from icosahedral reconstruction of Encapsulin:Encapsulated Ferritin complex | ||
