7LJ4

Human TRAAK K+ channel FHEIG mutant A270P in a K+ bound conductive conformation

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.8	277	50 mM Tris pH 8.8, 64-200 mM CaCl2, 27-33%(v/v) PEG400

Crystal Properties
Matthews coefficient	Solvent content
3.3	62.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.28	α = 90
b = 136.88	β = 94.24
c = 95.58	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	80	PIXEL	DECTRIS EIGER2 X 16M		2019-10-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-C	0.97910	APS	24-ID-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2.782	47.66	63.22	0.3906	0.4065	0.1116	0.992	4.69	13.2		32708

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.782	3.087	15.03		2.167	2.254	0.617	0.5536	1.323	6.63

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	4WFE	2.782	47.66	31089	1619	63.21	0.21668	0.2145	0.2579	RANDOM	70.366

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
0.11		-0.2	2.05		-2.1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.172
r_dihedral_angle_4_deg	17.53
r_dihedral_angle_3_deg	15.983
r_dihedral_angle_1_deg	7.288
r_angle_refined_deg	1.528
r_angle_other_deg	1.249
r_chiral_restr	0.062
r_bond_refined_d	0.009
r_gen_planes_refined	0.006
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.172
r_dihedral_angle_4_deg	17.53
r_dihedral_angle_3_deg	15.983
r_dihedral_angle_1_deg	7.288
r_angle_refined_deg	1.528
r_angle_other_deg	1.249
r_chiral_restr	0.062
r_bond_refined_d	0.009
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10398
Nucleic Acid Atoms
Solvent Atoms	188
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing
XSCALE	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.