4I9W | pdb_00004i9w

Human two pore domain K+ channel TRAAK (K2P4.1) - Fab complex structure

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1ORS	PDB ENTRIES 1ORS and 3UM7
experimental model	PDB	3UM7	PDB ENTRIES 1ORS and 3UM7

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	277	50 mM Tris pH 8.5, 200 mM CaCl2, 27-30% PEG400, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.41	63.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.887	α = 90
b = 138.905	β = 94.87
c = 97.461	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	CCD	MARMOSAIC 300 mm CCD		2012-07-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-B	1.03318	APS	23-ID-B

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	2.75	48.6	99.6	0.077	20.1	4.2	55431	55209

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.75	2.8	95.8			3.9	2631

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRIES 1ORS and 3UM7	2.75	48.6	1	55623	55167	2797	99.18	0.20264	0.20264	0.20085	0.23564	0.2241	RANDOM	110.435

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]
-0.42		2.14	-3.14		3.33

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.476
r_dihedral_angle_4_deg	16.8
r_dihedral_angle_3_deg	15.556
r_dihedral_angle_1_deg	6.858
r_angle_refined_deg	1.01
r_angle_other_deg	0.631
r_chiral_restr	0.058
r_bond_refined_d	0.007
r_gen_planes_refined	0.007
r_gen_planes_other	0.004
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10384
Nucleic Acid Atoms
Solvent Atoms	153
Heterogen Atoms	7

Software

Software
Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling