7UP6

Crystal structure of C-terminal domain of MSK1 in complex with in covalently bound literature RSK2 inhibitor pyrrolopyrimidine cyanoacrylamide compound 25 (co-crystal)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	289	Crystals were produced by sitting drop vapor diffusion with an equal volume of the protein, Msk1-C terminal domain (PID6598-1, CID101276) at 4.91 mg/ml in 25mM HEPES pH 7.5, 150mM NaCl, 5% Glycerol, 5mM BME and a crystallization buffer containing 12.5% PEG 1000, 12.5% PEG 3350, 12.5% MPD: 20mM of each sodium formate, ammonium acetate, trisodium citrate, sodium-potassium tartrate, sodium oxamate: 100 mM MOPS / HEPES-Na pH 7.5 (tray ID 298849, well G8, Morpheus). Crystals were direly vitrified in in liquid N2. Puck ID BOW0-8

Crystal Properties
Matthews coefficient	Solvent content
3.06	59.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.17	α = 90
b = 71.17	β = 90
c = 144.84	γ = 120

Symmetry
Space Group	P 61

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		2018-03-08	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	2.6	35.59	99.9	0.084	0.09	0.999	17.02	7.7		12830			51.89

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	2.6	2.67	100		0.575	0.037	0.999	2.82	7.5

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	NONE	in-house model	2.6	35.59	1.35	12754	1316	99.7	0.17	0.166	0.209	0	61.88

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	14.718
f_angle_d	0.593
f_chiral_restr	0.045
f_bond_d	0.004
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1935
Nucleic Acid Atoms
Solvent Atoms	49
Heterogen Atoms	34

Software

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