3J0R
Model of a type III secretion system needle based on a 7 Angstrom resolution cryoEM map
ELECTRON MICROSCOPY
Sample |
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type III secretion needle |
Specimen Preparation | |
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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 | |
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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 | |||||
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Id | 1 | ||||
Refinement Space | REAL | ||||
Refinement Protocol | |||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
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Detector Type | TVIPS TEMCAM-F415 (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 20 |
Imaging Experiment | 1 |
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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 | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
CTFFIND3 Each particle |