5K7L
Single particle cryo-EM structure of the voltage-gated K+ channel Eag1 bound to the channel inhibitor calmodulin
ELECTRON MICROSCOPY
Refinement
RMS Deviations | |
---|---|
Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 30.68 |
r_long_range_B_refined | 29.639 |
r_long_range_B_other | 29.638 |
r_scangle_other | 26.614 |
r_scbond_it | 19.895 |
r_scbond_other | 19.891 |
r_mcangle_it | 16.95 |
r_mcangle_other | 16.949 |
r_dihedral_angle_3_deg | 15.408 |
r_dihedral_angle_4_deg | 12.017 |
Sample |
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Voltage-gated K+ channel Eag1 bound to the channel inhibitor calmodulin |
Sample Components |
Voltage-gated potassium channel Eag1 |
Calmodulin |
Specimen Preparation | |
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Sample Aggregation State | PARTICLE |
Vitrification Instrument | FEI VITROBOT MARK IV |
Cryogen Name | ETHANE |
Sample Vitrification Details | Plunged into liquid ethane (FEI VITROBOT MARK IV) |
3D Reconstruction | |
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Reconstruction Method | SINGLE PARTICLE |
Number of Particles | 145000 |
Reported Resolution (Å) | 3.78 |
Resolution Method | FSC 0.143 CUT-OFF |
Other Details | 2D classification, 3D classification, and refinement were performed in RELION. Final map generation was performed in FREALIGN. |
Refinement Type | |
Symmetry Type | POINT |
Point Symmetry | C4 |
Map-Model Fitting and Refinement | |||||
---|---|---|---|---|---|
Id | 1 | ||||
Refinement Space | RECIPROCAL | ||||
Refinement Protocol | AB INITIO MODEL | ||||
Refinement Target | |||||
Overall B Value | |||||
Fitting Procedure | |||||
Details |
Data Acquisition | |||||||||
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Detector Type | GATAN K2 SUMMIT (4k x 4k) | ||||||||
Electron Dose (electrons/Å**2) | 1.8 |
Imaging Experiment | 1 |
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Date of Experiment | |
Temperature (Kelvin) | |
Microscope Model | FEI TITAN KRIOS |
Minimum Defocus (nm) | 1500 |
Maximum Defocus (nm) | 3000 |
Minimum Tilt Angle (degrees) | |
Maximum Tilt Angle (degrees) | |
Nominal CS | |
Imaging Mode | BRIGHT FIELD |
Specimen Holder Model | FEI TITAN KRIOS AUTOGRID HOLDER |
Nominal Magnification | |
Calibrated Magnification | |
Source | FIELD EMISSION GUN |
Acceleration Voltage (kV) | 300 |
Imaging Details |
EM Software | ||
---|---|---|
Task | Software Package | Version |
PARTICLE SELECTION | RELION | 1.4 |
CTF CORRECTION | CTFFIND4 | 4 |
MODEL FITTING | Coot | |
INITIAL EULER ASSIGNMENT | RELION | 1.4 |
FINAL EULER ASSIGNMENT | RELION | 1.4 |
FINAL EULER ASSIGNMENT | FREALIGN | |
RECONSTRUCTION | FREALIGN | |
MODEL REFINEMENT | REFMAC |
Image Processing | ||||
---|---|---|---|---|
CTF Correction Type | CTF Correction Details | Number of Particles Selected | Particle Selection Details | |
PHASE FLIPPING AND AMPLITUDE CORRECTION | 240000 | Particles were auto-picked and manually inspected in RELION. |