7UP4

Crystal structure of C-terminal Domain of MSK1 in complex with covalently bound pyrrolopyrimidine compound 20 (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 (PID7059-1, CID101276) at 7.6 mg/ml in 25mM HEPES pH 7.5, 150mM NaCl, 5% Glycerol, 5mM BME and a crystallization buffer containing 20mM of each DL-glutamic acid, DL-alanine, glycine, DL-lysine, DL-serine, sodium HEPES / MOPS (acid) pH 7.5, 12.5% (V/V) MPD, 12.5% (w/V) PEG 1000, 12.5% (w/V) PEG 3350 (tray ID 320260, well H8, Molecular Dimensions / Calibre Morpheus screen ). Crystals were direly vitrified in in liquid N2. Puck ID CNL6-3

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.44	α = 90
b = 91.18	β = 90
c = 136.17	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		2021-04-08	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	3	50	99.7	0.109	0.126	0.994	11.27	3.999		13380			43.356

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	3	3.08	100		0.575	0.663	0.781	2.46	4.094

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	3	48.12	1.35	13376	1273	99.71	0.1984	0.1906	0.2707	0	54.11

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	13.5726
f_angle_d	0.629
f_chiral_restr	0.0418
f_bond_d	0.0042
f_plane_restr	0.0041

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4466
Nucleic Acid Atoms
Solvent Atoms	5
Heterogen Atoms	32

Software

Software
Software Name	Purpose
XDS	data reduction
XSCALE	data scaling
PHENIX	refinement
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.