Experiment: 9OBA

Crystal structure of nucleoside-diphosphate kinase from Cryptosporidium parvum containing phosphorylated active site histidine

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold	AF-Q5CR64-F1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5.5	291	Berkeley F12: 25% MPD, 0.1M sodium Formate, 0.1M Citrate pH 5.5. CrpaA.01302.a.B2.PW39348 at 8.9 mg/mL. Crystals soaked for 4 hours in 10mM ADP and CTP, 5mM MgCl2 in 40% MPD, 0.1M sodium Formate, 0.1M Citrate pH 5.5. Crystals were soaked with 10mM ATP for 4 hours which phosphorylated His139. No ADP bound after phosphorylation. plate Liu-S-177 D2, Puck: PSL-0411, Cryo: direct

Crystal Properties
Matthews coefficient	Solvent content
2.08	40.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.665	α = 90
b = 69.665	β = 90
c = 315.755	γ = 120

Symmetry
Space Group	P 65 2 2

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	DECTRIS EIGER2 XE 9M		2025-04-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS-II BEAMLINE 19-ID	0.9786	NSLS-II	19-ID

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	1.58	47.93	99.9	0.122	0.125	0.03	0.998	15.7	16.4		63689

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	1.58	1.62		98.9	0.836	0.911	0.35	0.721		6.3

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1.58	47.93	1.35	63518	3037	99.87	0.1451	0.144	0.1594	0.1681	0.1806

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	15.305
f_angle_d	1.049
f_chiral_restr	0.059
f_plane_restr	0.01
f_bond_d	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3509
Nucleic Acid Atoms
Solvent Atoms	442
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
XDS	data reduction
PHASER	phasing
PDB_EXTRACT	data extraction