8H87

Cryo-EM structure of the potassium-selective channelrhodopsin HcKCR2 in lipid nanodisc

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	14.994
r_long_range_B_refined	14.537
r_long_range_B_other	14.517
r_dihedral_angle_2_deg	9.431
r_scangle_other	8.598
r_mcangle_other	5.705
r_mcangle_it	5.675
r_scbond_it	5.434
r_scbond_other	5.432
r_dihedral_angle_1_deg	5.351
r_mcbond_it	3.924
r_mcbond_other	3.916
r_angle_refined_deg	1.538
r_angle_other_deg	0.478
r_chiral_restr	0.077
r_gen_planes_refined	0.008
r_bond_refined_d	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_dihedral_angle_4_deg
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
HcKCR2

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details
Embedding Material	Lipid
Embedding Details	nanodisc composing of MSP1D1E3 and soybean lipid

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	682797
Reported Resolution (Å)	2.53
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C3

Map-Model Fitting and Refinement
Id	1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	51

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	800
Maximum Defocus (nm)	1600
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

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