9GXY | pdb_00009gxy

Crystal structure of protein kinase CK2 catalytic subunit (CSNK2A2 gene product) in complex with the dual CK2/HDAC inhibitor IOR-160

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	Original crystal: 47.5 microliter CK2alphaPrime mixed with 2.5 microliter of a 20 mM CX-4945 solution in DMSO to a final concentration of 5 mg per mL protein and 1 mM CX-4945. Reservoir (900 mM LiCl, 250 mM TRIS HCl, pH 8.5, 28 % PEG 6000) was mixed 1:2 with protein stock. Crystal were optimized by micro- and macroseeding. IOR-160 was introduced by back-soaking: 8 microliter reservoir were mixed for this with with 2 microliter of a 10 mM IOR-160 stock in DMSO. The crystal was soaked in 4 microliters of this solution of 72 hours.

Crystal Properties
Matthews coefficient	Solvent content
2.4	48.75

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.343	α = 66.58
b = 47.734	β = 89.78
c = 50.706	γ = 88.99

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 EIGER X 16M		2024-09-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, EMBL c/o DESY BEAMLINE P13 (MX1)	0.9763	PETRA III, EMBL c/o DESY	P13 (MX1)

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	1.157	46.529	59.8	0.073	0.078	0.028	0.997	16	7.5		84256			9.5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.161	1.202			2.182	0.694	1.6

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1.16	41.06	1.96	84113	1980	60.38	0.1606	0.1602	0.1605	0.1778	0.1783	16.33

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	13.9904
f_angle_d	1.2739
f_chiral_restr	0.1102
f_plane_restr	0.0137
f_bond_d	0.012

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2759
Nucleic Acid Atoms
Solvent Atoms	359
Heterogen Atoms	29

Software

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

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.