3BJ4

The KCNQ1 (Kv7.1) C-terminus, a multi-tiered scaffold for subunit assembly and protein interaction

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	292	12-16% PEG 8K, 0.1M Tris, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 292K

Crystal Properties
Matthews coefficient	Solvent content
2.49	50.63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.321	α = 90
b = 51.321	β = 90
c = 71.094	γ = 120

Symmetry
Space Group	P 31 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	CCD	ADSC QUANTUM 210		2004-07-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	0.9792	ESRF	ID29

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	50	99.2	0.065	19.6	4.8	7656	7656			32.3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2	2.07	99.5		0.33	3.36	2.8	1432

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	MIRAS	THROUGHOUT	2	44.46	7336	7283	354	99.28	0.22308	0.22149	0.25492	RANDOM	32.302

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]
-0.59	-0.29		-0.59		0.88

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.313
r_dihedral_angle_3_deg	17.194
r_dihedral_angle_4_deg	16.943
r_scangle_it	6.838
r_scbond_it	5.034
r_dihedral_angle_1_deg	4.35
r_mcangle_it	2.712
r_mcbond_it	1.845
r_angle_refined_deg	1.363
r_nbtor_refined	0.273

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.313
r_dihedral_angle_3_deg	17.194
r_dihedral_angle_4_deg	16.943
r_scangle_it	6.838
r_scbond_it	5.034
r_dihedral_angle_1_deg	4.35
r_mcangle_it	2.712
r_mcbond_it	1.845
r_angle_refined_deg	1.363
r_nbtor_refined	0.273
r_nbd_refined	0.187
r_symmetry_vdw_refined	0.183
r_symmetry_hbond_refined	0.174
r_xyhbond_nbd_refined	0.129
r_chiral_restr	0.094
r_bond_refined_d	0.008
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	640
Nucleic Acid Atoms
Solvent Atoms	53
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.