5M4F

Complex structure of human protein kinase CK2 catalytic subunit with the inhibitor 4'-carboxy-6,8-chloro-flavonol (FLC21) crystallized under low-salt conditions

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		293	PROTEIN STOCK SOLUTION: 6 MG/ML CK2ALPHA1-335 IN 0.5 M NACL, 25 MM TRIS/HCL, PH 8.5; INHIBITOR STOCK SOLUTION: 10 MM INHIBITOR IN DMSO; PROTEIN/INHIBITOR COMPLEX SOLUTION: 90 MICROLITER PROTEIN STOCK SOLUTION + 10 MICROLITER INHIBITOR STOCK SOLUTION; RESERVOIR SOLUTION: 24 % PEG3350, 0.2 M KCl; DROP SOLUTION BEFORE EQULIBRATION: 0.5 MICROLITER PROTEIN/INHIBITOR COMPLEX SOLUTION + 0.5 MICROLITER RESERVOIR SOLUTION

Crystal Properties
Matthews coefficient	Solvent content
1.96	37.21

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.033	α = 90
b = 79.569	β = 90
c = 82.142	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	MARMOSAIC 225 mm CCD		2012-03-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.1	0.91841	BESSY	14.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	1.519	41.5	100	0.05914	0.05914	0.999	15.82	4.1		49151			15.41

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	1.519	1.574	99		0.7874	0.661	1.89	4

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	3NSZ	1.519	41.464	1.35	49147	1031	99.74	0.1632	0.1628	0.1826

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	17.442
f_angle_d	1.29
f_chiral_restr	0.085
f_bond_d	0.014
f_plane_restr	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2788
Nucleic Acid Atoms
Solvent Atoms	384
Heterogen Atoms	43

Software

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

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.