Experiment: 9HZH

Protein kinase CK2 catalytic subunit alpha (CSNK2A1 gene product) in complex with F2X-Entry screen fragment F02 and CX-4945 (Silmitasertib)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2PVR

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		293	Reservoir:200 mM Li2SO4, 100 mM Bis-Tris/HCl, pH 6.5, 35 % (w/v) PEG 3350 Protein/Ligand mix: 5 mg per mL CK2alpha1-335, 100 mM ligand/0.5 mM CX-4945, 10 % DMSO prequilibrated Drop: 4 microliter protein/ligand mix, 2 microliter reservoir solution

Crystal Properties
Matthews coefficient	Solvent content
3.07	59.93

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 129.488	α = 90
b = 129.488	β = 90
c = 123.731	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 EIGER X 16M		2024-12-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, EMBL c/o DESY BEAMLINE P13 (MX1)	0.97626	PETRA III, EMBL c/o DESY	P13 (MX1)

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	2.07	91.562	71.5	0.33	0.065	0.996	11.9	26.1		46064			28.07

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.07	2.304			2.358	0.551	0.168	1

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	2.07	91.56	1.33	46018	1160	71.56	0.2157	0.2146	0.2142	0.2557	0.255	39.94

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	10.8038
f_angle_d	0.4334
f_chiral_restr	0.0412
f_plane_restr	0.0043
f_bond_d	0.0017

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5586
Nucleic Acid Atoms
Solvent Atoms	373
Heterogen Atoms	116

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
autoPROC	data processing
Aimless	data scaling
PHASER	phasing