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Structure of the human two pore domain potassium ion channel THIK-1 (K2P13.1) in a closed conformation
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Grid blotted for 4 seconds
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 302189 Reported Resolution (Å) 3.16 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C2
Map-Model Fitting and Refinement Id 1 Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details An initial model was built manually in COOT
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 42.54
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1000 Maximum Defocus (nm) 2300 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification 105000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.2.1 IMAGE ACQUISITION EPU CTF CORRECTION cryoSPARC 4.2.1 MODEL REFINEMENT PHENIX 1.20.1-4487 INITIAL EULER ASSIGNMENT cryoSPARC 4.4.0 FINAL EULER ASSIGNMENT cryoSPARC 4.4.0 RECONSTRUCTION cryoSPARC 4.4.0
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION