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