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Cryo-EM structure of a SUR1/Kir6.2-Q52R ATP-sensitive potassium channel in the presence of PIP2 in the open conformation
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 6BAA
Refinement RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 11.283 f_angle_d 0.432 f_chiral_restr 0.039 f_plane_restr 0.003 f_bond_d 0.002
Sample Kir6.2-Q52R/SUR1 open channel
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK III Cryogen Name ETHANE Sample Vitrification Details
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 14115 Reported Resolution (Å) 2.9 Resolution Method FSC 0.143 CUT-OFF Other Details Refinement Type Symmetry Type POINT Point Symmetry C4
Map-Model Fitting and Refinement Id 1 (6BAA) Refinement Space Refinement Protocol FLEXIBLE FIT Refinement Target Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K3 (6k x 4k) Electron Dose (electrons/Å**2) 55
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1000 Maximum Defocus (nm) 2500 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 105000 Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details Titan Krios #3 at the Pacific Northwest National Lab
EM Software Task Software Package Version PARTICLE SELECTION cryoSPARC 4.2.1 CTF CORRECTION cryoSPARC 4.2.1 MODEL FITTING Coot MODEL REFINEMENT PHENIX INITIAL EULER ASSIGNMENT cryoSPARC 4.2.1 FINAL EULER ASSIGNMENT cryoSPARC 4.2.1 CLASSIFICATION cryoSPARC 4.2.1 RECONSTRUCTION cryoSPARC 4.2.1
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 14115