6HME

LOW-SALT STRUCTURE OF PROTEIN KINASE CK2 CATALYTIC SUBUNIT (ISOFORM CK2ALPHA; CSNK2A1 gene product) IN COMPLEX WITH THE INDENOINDOLE-TYPE INHIBITOR THN27

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	293.15	180 MICROLITERS OF ENZYME SOLUTION (6 MG/ML CK2ALPHA, 0.025 M TRIS/HCL, PH 8.5, 0.5 M NACL) WERE MIXED WITH 20 MICROLITERS OF INHIBITOR STOCK SOLUTION (0.010 M INHIBITOR THN27 IN DMSO). THIS MIXTURE WAS INCUBATED FOR 30 MIN AT ROOM TEMPERATURE. THE RESERVOIR SOLUTION OF THE CRYSTALLIZATION EXPERIMENT WAS 0.2 M AMMONIUM SULFATE, 0.1 M SODIUM CACODYLATE TRIHYDRATE, PH 6.5, 30% (W/V) PEG 8,000. PRIOR TO EQUILIBRATION THE CRYSTALLIZATION DROP WAS COMPOSED OF 10 MICROLITERS RESERVOIR SOLUTION PLUS 20 MICROLITERS ENZYME/INHIBITOR MIXTURE.

Crystal Properties
Matthews coefficient	Solvent content
3.11	60.39

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 126.37	α = 90
b = 126.37	β = 90
c = 124.63	γ = 90

Symmetry
Space Group	P 43 21 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	PIXEL	DECTRIS PILATUS 6M		2018-06-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, EMBL c/o DESY BEAMLINE P13 (MX1)	0.9794	PETRA III, EMBL c/o DESY	P13 (MX1)

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	1.85	89.357	99.82	0.05501	0.05501	0.05994	0.02339	0.999	16.12	6.5		86172			40.69

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	1.85	1.916	99.88		1.701	1.701	1.843	0.7053	0.535	0.96	6.8

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	FREE R-VALUE	5ONI	1.85	89.357	1.34	86126	1724	99.82	0.1754	0.1749	0.197

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	16.33
f_angle_d	0.835
f_chiral_restr	0.054
f_bond_d	0.006
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5608
Nucleic Acid Atoms
Solvent Atoms	389
Heterogen Atoms	126

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing
Coot	model building

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.