4BW5

Crystal structure of human two pore domain potassium ion channel TREK2 (K2P10.1)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3UM7	PDB ENTRIES 3UM7, 3UKM
experimental model	PDB	3UKM	PDB ENTRIES 3UM7, 3UKM

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8	277	0.001M CADMIUM CHLORIDE, 0.2M POTASSIUM CHLORIDE,31%(V/V) PEG400,0.1M HEPES PH 8.0, 2% (W/V) BENZAMIDINE, TEMPERATURE 277K

Crystal Properties
Matthews coefficient	Solvent content
3.55	65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.83	α = 90
b = 96.96	β = 92.58
c = 103.7	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	100	PIXEL	DECTRIS PILATUS		2012-12-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I24		Diamond	I24

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	3.2	39.57	99.4	0.05	10.7	3.8		28707			143.85

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.2	3.28	99		1.14	1.1	3.7

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	THROUGHOUT	PDB ENTRIES 3UM7, 3UKM	3.2	39.57	28689	1458	99.29	0.2377	0.2369	0.254	RANDOM	155.24

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]
-9.2052		-24.0457	4.3948		4.8105

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	2.44
t_omega_torsion	1.99
t_angle_deg	0.93
t_bond_d	0.009
t_dihedral_angle_d
t_incorr_chiral_ct
t_pseud_angle
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7203
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	32

Software

Software
Software Name	Purpose
BUSTER	refinement
XDS	data reduction
Aimless	data scaling
PHASER	phasing