7UP7

Crystal structure of C-terminal Domain of MSK1 in complex with covalently bound with literature RSK2 inhibitor indazole cyanoacrylamide compound 26 (soak)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	289	Crystals were produced by sitting drop vapor diffusion with an equal volume of the protein, Msk1-C terminal domain (PID7059-1, CID101276) at 5 mg/ml with 1.5mM UCB1590591/BSI106893 in 25mM HEPES pH 7.5, 150mM NaCl, 5% Glycerol, 5mM BME and a crystallization buffer containing 100mM sodium malonate pH 8.0, 100mM Tris pH 8.0, 30% w/v PEG 1000 (tray ID 305760, well F2, CID101276_fine1 screen). Crystals were soaked for 4 days in 2.5ul of reservoir with 1mM UCB1590956/BSI100006.Crystals were cryo protected with 20% EG + compound and vitrified in in liquid N2. Puck ID WJP9-1

Crystal Properties
Matthews coefficient	Solvent content
2.26	45.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.93	α = 90
b = 90.52	β = 90
c = 135.58	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	RAYONIX MX-300		2018-12-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-F	0.97872	APS	21-ID-F

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim 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	2.8	50	99.8	0.086	0.095	0.998	16.94	5.267		16052			51.99

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.8	2.87	100		0.576	0.637	0.853	3	5.377

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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	in-house model	2.8	47.68	1.35	16047	1603	99.79	0.1877	0.1813	0.2444	0	54.16

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	19.0373
f_angle_d	0.5914
f_chiral_restr	0.0431
f_plane_restr	0.0034
f_bond_d	0.0032

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4282
Nucleic Acid Atoms
Solvent Atoms	23
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PDB_EXTRACT	data extraction
PHENIX	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 R01GM133198.