ELECTRON MICROSCOPY

Sample

Potassium/Sodium hyperpolarization-activated cyclic nucleotide-gated ion channel 4

Specimen Preperation
Sample Aggregation State PARTICLE
Vitrification Instrument FEI VITROBOT MARK IV
Cryogen Name ETHANE
Sample Vitrification Details blotted for 5.5s before plunge
3D Reconstruction
Reconstruction Method SINGLE PARTICLE
Number of Particles 55829
Reported Resolution (Å) 3.4
Resolution Method FSC 0.143 CUT-OFF
Other Details ?
Refinement Type
Symmetry Type POINT
Map-Model Fitting and Refinement
ID 1
Refinement Space REAL
Refinement Protocol AB INITIO MODEL
Refinement Target ?
Overall B Value ?
Fitting Procedure ?
Details Initial model was from ligand-free HCN4. Model refined against the cryosparc b-factor sharpened map using default restraints
Data Acquisition
Detector Type GATAN K2 SUMMIT (4k x 4k)
Electron Dose (electrons/Å2) 48
Imaging Experiment
Date of Experiment ?
Temprature (Kelvin)
Microscope Model FEI TITAN KRIOS
Minimum Defocus (nm) 1300
Maximum Defocus (nm) 2500
Minimum Tilt Angle (degrees) ?
Maximum Tilt Angle (degrees) ?
Nominal CS ?
Imaging Mode BRIGHT FIELD
Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification 37313
Calibrated Magnification ?
Source FIELD EMISSION GUN
Acceleration Voltage (kV) 300
Imaging Details EBIC TITAN KRIOS M07
Imaging Experiment
Task Software Package Version
PARTICLE SELECTION Gautomatch 0.53
IMAGE ACQUISITION EPU ?
CTF CORRECTION CTFFIND 4.1.5
MODEL FITTING Coot 0.8.9.1
INITIAL EULER ASSIGNMENT RELION 2.1-beta-0
FINAL EULER ASSIGNMENT RELION 2.1-beta-0
CLASSIFICATION RELION 2.1-beta-0
RECONSTRUCTION cryoSPARC 0.6.5
MODEL REFINEMENT PHENIX 1.13
Image Processing
CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION ?