Atomic model of the VipA/VipB, the type six secretion system contractile sheath of Vibrio cholerae from cryo-EM
ELECTRON MICROSCOPY
| Sample |
|---|
| Vibrio cholerae VipA/VipB sheath in a contracted state |
| Sample Components |
| VipA |
| VipB |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | FILAMENT |
| Vitrification Instrument | FEI VITROBOT MARK IV |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | Plunged into liquid ethane (FEI VITROBOT MARK IV) |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | HELICAL |
| Number of Particles | 96000 |
| Reported Resolution (Å) | 3.5 |
| Resolution Method | |
| Other Details | |
| Refinement Type | |
| Symmetry Type | HELICAL |
| Axial Symmetry | C6 |
| Axial Rise | 21.8 |
| Angular Rotation | 29.4 |
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | GATAN K2 (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 30 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2013-11-15 |
| Temperature (Kelvin) | 63 |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 400 |
| Maximum Defocus (nm) | 2000 |
| Minimum Tilt Angle (degrees) | -5 |
| Maximum Tilt Angle (degrees) | 5 |
| Nominal CS | 2.7 |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
| Nominal Magnification | 29000 |
| Calibrated Magnification | |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| CTF CORRECTION | CTFFIND | |
| PARTICLE SELECTION | Helixboxer | |
| RECONSTRUCTION | IHRSR | |
| RECONSTRUCTION | SPIDER | |
| Image Processing | ||||
|---|---|---|---|---|
| CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
| Phase Flip, CTF detection by CTFFIND | ||||
