5VMS

CryoEM structure of Xenopus KCNQ1 channel

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	25.246
r_dihedral_angle_3_deg	13.416
r_long_range_B_refined	13.321
r_long_range_B_other	13.321
r_dihedral_angle_4_deg	11.264
r_scangle_other	9.641
r_mcangle_it	7.466
r_mcangle_other	7.465
r_scbond_it	5.414
r_scbond_other	5.413
r_mcbond_it	4.554
r_mcbond_other	4.553
r_dihedral_angle_1_deg	4.283
r_angle_refined_deg	1.228
r_angle_other_deg	0.882
r_chiral_restr	0.076
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
Complex of Xenopus KCNQ1 and CaM

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details	90-100% humidity

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	69415
Reported Resolution (Å)	3.7
Resolution Method	FSC 0.143 CUT-OFF
Other Details	Entry was refined using space group P4 and cell parameters a=b=c=332.8 and alpha=beta=gamma=90.
Refinement Type
Symmetry Type	POINT
Point Symmetry	C4

Data Acquisition
Detector Type	DIRECT ELECTRON DE-64 (8k x 8k)
Electron Dose (electrons/Å**2)	1.78

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
RECONSTRUCTION	RELION	1.3
RECONSTRUCTION	FREALIGN	9.03

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION