8QCD

STRUCTURE OF PROTEIN KINASE CK2 CATALYTIC SUBUNIT (ISOFORM CK2ALPHA'; CSNK2A2 GENE PRODUCT) IN COMPLEX WITH THE INHIBITOR 4,5,6,7-TETRABROMOBENZOTRIAZOLE

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6HMQ

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293	THE CK2ALPHA' SOLUTION AFTER PROTEIN PURIFICATION (5 MG/ML CK2ALPHA' IN 500 MM NACL, 25 MM TRIS/HCl, PH 8.5) WAS MIXED IN A 1:10 RATIO WITH A 20 MM SOLUTION OF 4,5,6,7-TETRABROMOBENZOTRIAZOLE (TBBT) IN DMSO. AFTER INCUBATION ON ICE FOR 30 MIN AND CENTRIFUGATION (16100 TIMES G FOR 2 MIN AT ROOM TEMPERATUR) 10 MIKROLITER OF THE SUPERNATANT WERE MIXED WITH 5 MIKORLITER OF THE RESERVOIR SOLUTION [900 MM LICL, 28% (W/V) PEG 6000, 100 MM TRIS/HCl, PH 8.5]. AFTER EQUILIBRATION, MICROSEEDING WAS CARRIED OUT TO INDUCE CRYSTAL GROWTH. SMALL CRYSTALS APPEARED AFTER ONE WEEK. ONE OF THEM WAS USED AS A MACROSEED TRANSFERING IT TO A SECOND DROP PREPARED IN THE SAME MANNER AS THE FIRST ONE. ALL CRSTALLIZATION STEPS WERE PERFORMED AT A TEMPERATURE OF 293 K.

Crystal Properties
Matthews coefficient	Solvent content
2.61	52.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.338	α = 113.48
b = 47.701	β = 90.45
c = 50.342	γ = 90.17

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 6M		2022-04-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.8856	ESRF	ID23-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	1.03	46.336	76.9	0.128	0.979	5.7	2.6		149296			1.45

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.033	1.07			0.561

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	MOLECULAR REPLACEMENT	FREE R-VALUE	1.03	24.92	1.96	149265	2014	76.9	0.1439	0.1437	0.1562	7.66

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	13.1231
f_angle_d	1.0517
f_chiral_restr	0.0906
f_plane_restr	0.0132
f_bond_d	0.0094

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2759
Nucleic Acid Atoms
Solvent Atoms	397
Heterogen Atoms	25

Software

Software
Software Name	Purpose
autoPROC	data reduction
autoPROC	data scaling
PHASER	phasing
PHENIX	refinement

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 R01GM157729.