4KFM

Crystal structure of the G protein-gated inward rectifier K+ channel GIRK2 (Kir3.2) in complex with the beta-gamma G protein subunits

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.8	293.15	600 mM NaK tartrate, 50 mM Na-ADA, pH 5.8, vapor diffusion, hanging drop, temperature 293.15K

Crystal Properties
Matthews coefficient	Solvent content
3.72	66.96

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 127.308	α = 90
b = 127.308	β = 90
c = 309.392	γ = 90

Symmetry
Space Group	I 4 2 2

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	MAR		2012-11-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-B	1.034	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	3.45	50	96	0.226	3.5	10.6		16537

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	3.45	3.57	72.5			8.7	1220

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	3.45	49.89	16535	844	95.35	0.2296	0.2278	0.2653	RANDOM	123.0224

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]
-3.63			-3.63		7.25

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.613
r_dihedral_angle_4_deg	16.187
r_dihedral_angle_3_deg	15.074
r_dihedral_angle_1_deg	5.827
r_mcangle_it	5.338
r_mcbond_it	3.248
r_mcbond_other	3.247
r_angle_refined_deg	1.045
r_angle_other_deg	0.69
r_chiral_restr	0.057

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.613
r_dihedral_angle_4_deg	16.187
r_dihedral_angle_3_deg	15.074
r_dihedral_angle_1_deg	5.827
r_mcangle_it	5.338
r_mcbond_it	3.248
r_mcbond_other	3.247
r_angle_refined_deg	1.045
r_angle_other_deg	0.69
r_chiral_restr	0.057
r_bond_refined_d	0.006
r_gen_planes_refined	0.003
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5656
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	65

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction

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.