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Structure of the human two pore domain potassium ion channel TASK-3 L122V mutant (K2P9.1)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 9G9V
Sample K2P9.1 L122V homodimer
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Grid blotted for approximately 4 seconds
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 211355 Reported Resolution (Å) 2.83 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C2
Map-Model Fitting and Refinement Id 1 (9G9V) Refinement Space REAL Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value 60.32 Fitting Procedure Details Initial fitting was done using Coot and refinement was conducted with PHENIX.
Data Acquisition Detector Type GATAN K3 BIOQUANTUM (6k x 4k) Electron Dose (electrons/Å**2) 43.9
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model TFS KRIOS Minimum Defocus (nm) 1200 Maximum Defocus (nm) 2700 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 4.5.3 IMAGE ACQUISITION EPU CTF CORRECTION cryoSPARC 4.5.3 MODEL FITTING Coot 0.9.8.96 EL MODEL REFINEMENT PHENIX 1.21.2_5419 INITIAL EULER ASSIGNMENT cryoSPARC 4.5.3 FINAL EULER ASSIGNMENT cryoSPARC 4.6.2 CLASSIFICATION cryoSPARC 4.6.2 RECONSTRUCTION cryoSPARC 4.6.2
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 8381007