6NHT
Single particle reconstruction of the symmetric core an engineered protein scaffold
ELECTRON MICROSCOPY
| Sample |
|---|
| Subunit A with DARPin Subunit B |
| Sample Components |
| Subunit B |
| Subunit A with DARPin |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 2.5 microliter of sample, 0 sec wait, 0 sec drain, 3 sec blot, -15 blot force, grids pre-treated with 0.1% poly-lysine for 6 hours |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 80253 |
| Reported Resolution (Å) | 2.9 |
| Resolution Method | FSC 0.143 CUT-OFF |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | T |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (6C9K) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | FLEXIBLE FIT | ||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | Initial local fitting by Chimera and individual residues refined using phenix.real_space_refine | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 56 | ||||||||
| 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 | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
| Nominal Magnification | 130000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| PARTICLE SELECTION | RELION | 2.0 |
| IMAGE ACQUISITION | Leginon | |
| CTF CORRECTION | CTFFIND | 4.1.5 |
| MODEL FITTING | PHENIX | |
| MODEL REFINEMENT | PHENIX | |
| INITIAL EULER ASSIGNMENT | RELION | 2.0 |
| FINAL EULER ASSIGNMENT | cryoSPARC | v.2.4.0 |
| CLASSIFICATION | cryoSPARC | v.2.4.0 |
| RECONSTRUCTION | cryoSPARC | v.2.4.0 |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| PHASE FLIPPING ONLY | 81319 | |||
