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Single particle cryo-EM structure of the voltage-gated K+ channel Eag1 bound to the channel inhibitor calmodulin
Refinement RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 30.68 r_long_range_B_refined 29.639 r_long_range_B_other 29.638 r_scangle_other 26.614 r_scbond_it 19.895 r_scbond_other 19.891 r_mcangle_it 16.95 r_mcangle_other 16.949 r_dihedral_angle_3_deg 15.408 r_dihedral_angle_4_deg 12.017
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 30.68 r_long_range_B_refined 29.639 r_long_range_B_other 29.638 r_scangle_other 26.614 r_scbond_it 19.895 r_scbond_other 19.891 r_mcangle_it 16.95 r_mcangle_other 16.949 r_dihedral_angle_3_deg 15.408 r_dihedral_angle_4_deg 12.017 r_mcbond_it 10.272 r_mcbond_other 10.264 r_dihedral_angle_1_deg 4.765 r_angle_refined_deg 1.188 r_angle_other_deg 0.909 r_chiral_restr 0.071 r_bond_refined_d 0.007 r_gen_planes_refined 0.004 r_bond_other_d 0.001 r_gen_planes_other 0.001 r_nbd_refined r_nbd_other r_nbtor_refined r_nbtor_other r_xyhbond_nbd_refined r_xyhbond_nbd_other r_metal_ion_refined r_metal_ion_other r_symmetry_vdw_refined r_symmetry_vdw_other r_symmetry_hbond_refined r_symmetry_hbond_other r_symmetry_metal_ion_refined r_symmetry_metal_ion_other r_scangle_it r_rigid_bond_restr r_sphericity_free r_sphericity_bonded
Sample Voltage-gated K+ channel Eag1 bound to the channel inhibitor calmodulin Sample Components Voltage-gated potassium channel Eag1 Calmodulin
Specimen Preparation Sample Aggregation State PARTICLE Vitrification Instrument FEI VITROBOT MARK IV Cryogen Name ETHANE Sample Vitrification Details Plunged into liquid ethane (FEI VITROBOT MARK IV)
3D Reconstruction Reconstruction Method SINGLE PARTICLE Number of Particles 145000 Reported Resolution (Å) 3.78 Resolution Method FSC 0.143 CUT-OFF Other Details 2D classification, 3D classification, and refinement were performed in RELION. Final map generation was performed in FREALIGN. 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 Overall B Value Fitting Procedure Details
Data Acquisition Detector Type GATAN K2 SUMMIT (4k x 4k) Electron Dose (electrons/Å**2) 1.8
Imaging Experiment 1 Date of Experiment Temperature (Kelvin) Microscope Model FEI TITAN KRIOS Minimum Defocus (nm) 1500 Maximum Defocus (nm) 3000 Minimum Tilt Angle (degrees) Maximum Tilt Angle (degrees) Nominal CS Imaging Mode BRIGHT FIELD Specimen Holder Model FEI TITAN KRIOS AUTOGRID HOLDER Nominal Magnification Calibrated Magnification Source FIELD EMISSION GUN Acceleration Voltage (kV) 300 Imaging Details
EM Software Task Software Package Version PARTICLE SELECTION RELION 1.4 CTF CORRECTION CTFFIND4 4 MODEL FITTING Coot INITIAL EULER ASSIGNMENT RELION 1.4 FINAL EULER ASSIGNMENT RELION 1.4 FINAL EULER ASSIGNMENT FREALIGN RECONSTRUCTION FREALIGN MODEL REFINEMENT REFMAC
Image Processing CTF Correction Type CTF Correction Details Number of Particles Selected Particle Selection Details PHASE FLIPPING AND AMPLITUDE CORRECTION 240000 Particles were auto-picked and manually inspected in RELION.