7A1B

Crystal structure of human protein kinase CK2alpha' (CSNK2A2 gene product) in complex with the ATP-competitive inhibitor 5,6-dibromo-1H-triazolo[4,5-b]pyridine

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293	Reservoir composition: 28 % (w/v) PEG6000, 0.9 M LiCl, 0.1 M, Tris/HCl, pH 8.5; drop composition prior to equilibration: 0.01 ml reservoir solution + 0.02 ml CK2alpha' (mutant Cys336Ser)/inhibitor MB002 mixture (0.180 ml 6 mg/ml CK2alpha'Cys336Ser, 0.5 M NaCl, 25 mM Tris/HCl, pH 8.5, mixed and pre-equilibrated with 0.02 ml 10 mM MB002 in dimethyl sulfoxide); the initial inhibitor MB002 was replaced by the inhibitor 5,6-dibromo-1H-triazolo[4,5-b]pyridine by extensive crystal soaking.

Crystal Properties
Matthews coefficient	Solvent content
2.62	52.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.256	α = 113.229
b = 47.593	β = 89.996
c = 50.55	γ = 91.127

Symmetry
Space Group	P 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 2M		2018-11-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-2	0.87313	ESRF	ID23-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	1.287	46.45	70.6	0.078	0.078	0.093	0.05	0.997	8.3	3.4		70878			13.29

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.287	1.412	14.6		0.829	0.829	0.977	0.512	0.519	1.4	3.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	AB INITIO PHASING	FREE R-VALUE	1.287	46.45	1.96	70859	1411	69.38	0.158	0.1573	0.1925	18.92

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	18.561
f_angle_d	0.891
f_chiral_restr	0.0751
f_bond_d	0.0071
f_plane_restr	0.0057

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2759
Nucleic Acid Atoms
Solvent Atoms	291
Heterogen Atoms	38

Software

Software
Software Name	Purpose
XDS	data reduction
Aimless	data scaling
Arcimboldo	phasing
PHENIX	refinement

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.