9CMZ

Crystal Structure of Cdk-related protein kinase 6 (PK6) from Plasmodium falciparum in complex with inhibitor KG2-051

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	8U2O

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	291	Berkeley F7: 20% (w/v) PEG MME 5000, 100 mM Tris pH 8.5, 200 mM lithium sulfate. PlfaA.01252.a.A13.PW39218 at 15.9 mg/mL. His tag cleaved with 3C protease. 2mM KG2-051 added prior to crystallization. plate SS CloverBook4_pg5, Cryo: 80% crystallant + 20% PEG200.

Crystal Properties
Matthews coefficient	Solvent content
2.75	55.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 77.539	α = 90
b = 99.428	β = 100.78
c = 78.148	γ = 90

Symmetry
Space Group	P 1 21 1

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	Bruker PHOTON III		2024-05-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SEALED TUBE	BRUKER D8 QUEST	1.5418

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	2.45	44.4	99.3	0.122	0.127	0.037	0.987	18.8	11.6		42580

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.45	2.54		99.6	1.894	1.99	0.602	0.698		10.3

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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	2.45	34.66	1.34	42504	2094	99.03	0.2214	0.2196	0.2553

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	19.282
f_angle_d	0.973
f_chiral_restr	0.053
f_bond_d	0.009
f_plane_restr	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6682
Nucleic Acid Atoms
Solvent Atoms	26
Heterogen Atoms	118

Software

Software
Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
XDS	data reduction
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 R01GM157729.