Model of a type III secretion system needle based on a 7 Angstrom resolution cryoEM map
ELECTRON MICROSCOPY
| Sample |
|---|
| type III secretion needle |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | FILAMENT |
| Vitrification Instrument | FEI VITROBOT MARK I |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Blot for 3.5 seconds before plunging into liquid ethane (Vitrobot). |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | |
| Reported Resolution (Å) | 7.7 |
| Resolution Method | |
| Other Details | |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Axial Symmetry | C1 |
| Axial Rise | 4.3 |
| Angular Rotation | 64.06 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | |||||
| Refinement Target | |||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | |||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | TVIPS TEMCAM-F415 (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 20 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2008-07-02 |
| Temperature (Kelvin) | 50 |
| Microscope Model | JEOL 3200FSC |
| Minimum Defocus (nm) | 1000 |
| Maximum Defocus (nm) | 2000 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | 1.6 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 50000 |
| Calibrated Magnification | 89285 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 200 |
| Imaging Details |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| CTFFIND3 Each particle | ||||
