7E55
Cryo-EM structure of alpha 7 homo-tetradecamer
ELECTRON MICROSCOPY
Sample |
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Proteasome subunit alpha type-7 |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | |
Cryogen Name | ETHANE |
Sample Vitrification Details | |
Embedding Material | Ice |
Embedding Details |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 18388 |
Reported Resolution (Å) | 5.9 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | D7 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 (5DSV) | ||||
Refinement Space | REAL | ||||
Refinement Protocol | FLEXIBLE FIT | ||||
Refinement Target | |||||
Overall B Value | 531 | ||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
---|---|---|---|---|---|---|---|---|---|
Detector Type | DIRECT ELECTRON DE-20 (5k x 3k) | ||||||||
Electron Dose (electrons/Å**2) | 40 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | JEOL 2200FS |
Minimum Defocus (nm) | 1000 |
Maximum Defocus (nm) | 3000 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 4.2 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | GATAN 626 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER |
Nominal Magnification | 40000 |
Calibrated Magnification | 45065 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 200 |
Imaging Details |
EM Software | ||
---|---|---|
Task | Software Package | Version |
PARTICLE SELECTION | RELION | 3.1 |
IMAGE ACQUISITION | RELION | 3.1 |
CTF CORRECTION | CTFFIND | 4 |
MODEL FITTING | PHENIX | |
INITIAL EULER ASSIGNMENT | RELION | 3.1 |
FINAL EULER ASSIGNMENT | RELION | 3.1 |
RECONSTRUCTION | RELION | 3.1 |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING ONLY |