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Cryo-EM structure of the human ether-a-go-go related K+ channel
Sample human ether-a-go-go related K+ channel hERG
Specimen Preparation 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 Reconstruction Method SINGLE PARTICLE Number of Particles 206 Reported Resolution (Å) 4 Resolution Method FSC 0.143 CUT-OFF Other Details 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 Fourier Shell Correlation Overall B Value 180 Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 85
Imaging Experiment 1 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 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 INITIAL EULER ASSIGNMENT RELION 1.4 FINAL EULER ASSIGNMENT FREALIGN 9.11 CLASSIFICATION RELION 1.4 RECONSTRUCTION FREALIGN 9.11 MODEL REFINEMENT REFMAC 5.8
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 333000 ~333k particles from autopick