ELECTRON MICROSCOPY

Sample

Voltage-gated K+ channel Eag1 bound to the channel inhibitor calmodulin

Specimen Preperation
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
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
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
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 1.8
Imaging Experiment
Date of Experiment ?
Temprature (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 ?
Imaging Experiment
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 ?