5VA1
Cryo-EM structure of the human ether-a-go-go related K+ channel
ELECTRON MICROSCOPY
Sample |
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human ether-a-go-go related K+ channel hERG |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details | one blot: 3 second blot time, 0 blot force |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 213255 |
Reported Resolution (Å) | 3.7 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C4 |
Map-Model Fitting and Refinement | |||||
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Id | 1 | ||||
Refinement Space | RECIPROCAL | ||||
Refinement Protocol | AB INITIO MODEL | ||||
Refinement Target | Fourier Shell Correlation | ||||
Overall B Value | 140 | ||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
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Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 85 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 800 |
Maximum Defocus (nm) | 3500 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | 2.7 |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
Nominal Magnification | |
Calibrated Magnification | 38461 |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details |
EM Software | ||
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Task | Software Package | Version |
PARTICLE SELECTION | RELION | 1.4 |
IMAGE ACQUISITION | SerialEM | 3.5 |
IMAGE ACQUISITION | DigitalMicrograph | 3 |
CTF CORRECTION | RELION | 1.4 |
CTF CORRECTION | CTFFIND | 4 |
MODEL FITTING | UCSF Chimera | 1.10.2 |
MODEL FITTING | Coot | 0.8.2 |
MODEL REFINEMENT | REFMAC | 5.8 |
INITIAL EULER ASSIGNMENT | RELION | 1.4 |
FINAL EULER ASSIGNMENT | RELION | 1.4 |
CLASSIFICATION | RELION | 1.4 |
RECONSTRUCTION | RELION | 1.4 |
Image Processing | ||||
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CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION | 830000 | ~830k particles from Autopick |