7L4A

Crystal Structure of Cytidylate kinase from Encephalitozoon cuniculi GB-M1 in complex with two CDP molecules

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	287	Optimization condition: 100mM BisTris pH 6, 200mM ammonium sulfate, 26% (w/V) PEG 3350: EucuA.01086.a.AE1.PS38633 at 56.56mg/ml + 5mM CTP + 5mM MgCl2: tray 318933 a2: cryo: 20% EG + ligands: puck akp1-5. For phasing, a crystal from MCSG1, condition D7 (20% (w/V) PEG 3000, 100mM sodium citrate tribasic / citric acid pH 5.5: EncuA.01086.a.AE1.PS38636 at 28.28mg/ml, tray 315976 d7) was dipped for 20sec in a solution of 4ul half saturated NaI in ethylene glycol and reservoir and directly vitrified. This crystal form could not be reproduced.

Crystal Properties
Matthews coefficient	Solvent content
2.15	42.8

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.52	α = 90
b = 46.87	β = 112.592
c = 53.83	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	CCD	RAYONIX MX-300	Beryllium Lenses	2020-12-03	M	SINGLE WAVELENGTH
2	1	x-ray	100	CCD	RIGAKU SATURN 944+		2020-07-15	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
2	ROTATING ANODE	RIGAKU FR-E+ SUPERBRIGHT	1.5418

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	1.5	50	99.5	0.042	0.049	0.999	17.71	4.026		35784			25.36

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	1.5	1.54	97		0.448	0.538	0.822	2.49	3.189

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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	FREE R-VALUE	1.5	44.8	1.36	35775	2003	99.64	0.1507	0.1482	0.1903	0	25.13

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	11.1348
f_angle_d	0.9541
f_chiral_restr	0.0586
f_plane_restr	0.0118
f_bond_d	0.0081

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1779
Nucleic Acid Atoms
Solvent Atoms	235
Heterogen Atoms	59

Software

Software
Software Name	Purpose
XDS	data reduction
XSCALE	data scaling
PHENIX	refinement
PDB_EXTRACT	data extraction
PHASER	phasing
PARROT	phasing
ARP/wARP	model building
Coot	model building

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.