5A0Q
Cryo-EM reveals the conformation of a substrate analogue in the human 20S proteasome core
ELECTRON MICROSCOPY
Sample |
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HUMAN 20S PROTEASOME CORE |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK III |
Cryogen Name | ETHANE |
Sample Vitrification Details | VITRIFICATION 1 -- CRYOGEN- ETHANE, HUMIDITY- 95, TEMPERATURE- 120, INSTRUMENT- FEI VITROBOT MARK III, METHOD- BLOT 2. 5 SECONDS BEFORE PLUNGING, |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 76500 |
Reported Resolution (Å) | 3.5 |
Resolution Method | |
Other Details | DISORDERED REGIONS, NOT RECOVERED IN THE EM MAP, WHERE NOT MODELED. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-2981. (DEPOSITION ID: 13310). |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C2 |
Map-Model Fitting and Refinement | |||||
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Id | 1 (3UNE) | ||||
Refinement Space | REAL | ||||
Refinement Protocol | FLEXIBLE FIT | ||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details | METHOD--FLEXIBLE |
Data Acquisition | |||||||||
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Detector Type | FEI FALCON II (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 4.8 |
Imaging Experiment | 1 |
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Date of Experiment | 2014-02-04 |
Temperature (Kelvin) | 85 |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 1700 |
Maximum Defocus (nm) | 3000 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 2.7 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | |
Nominal Magnification | 75000 |
Calibrated Magnification | 134461 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details | EACH EXPOSURE WAS RECORDED AS 17 INDIVIDUAL FRAMES CAPTURED AT A RATE OF 0.056 SECONDS PER FRAME, WITH AN ELECTRON DOSE OF 2.8 ELECTRONS PER SQUARE ANGSTROM. DATA-SET RECORDED USING EPU SOFTWARE. |
EM Software | ||
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Task | Software Package | Version |
MODEL FITTING | Coot | |
MODEL FITTING | PHENIX | |
RECONSTRUCTION | IMAGIC | |
RECONSTRUCTION | SPIDER | |
RECONSTRUCTION | TIGRIS |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
FULL RECORDED IMAGE |