3FFS

The Crystal Structure of Cryptosporidium parvum Inosine-5'-Monophosphate Dehydrogenase

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	298	Protein solution: 4 mg/mL IMPDH, 50 mM Tris, pH 7.5, 150 mM KCl, 5 % glycerol and 2 mM dithiothreitol. Well solution: 34 % PEG 4000, 25 mM sodium acetate and 100 mM Tris-Cl, pH 8.5. Combined in a 1:1 ratio. VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.6	52.66

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 119.068	α = 90
b = 153.319	β = 90
c = 98.228	γ = 90

Symmetry
Space Group	P 21 21 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	CCD	ADSC QUANTUM 315		2006-10-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 8-BM	0.97946	APS	8-BM

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	3.19	50	100	0.179		6.8		30575

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3.19	3.31	100		0.632		6.9	2987

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	THROUGHOUT	PDB entry 1EEP	3.19	48.34	30575	30483	1536	99.08	0.272	0.269	0.328	RANDOM	53.887

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]
0.03			-0.01		-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.389
r_dihedral_angle_3_deg	21.72
r_dihedral_angle_4_deg	20.271
r_dihedral_angle_1_deg	6.239
r_angle_refined_deg	1.452
r_scangle_it	1.252
r_mcangle_it	0.737
r_scbond_it	0.737
r_mcbond_it	0.409
r_nbtor_refined	0.306
r_nbd_refined	0.235
r_symmetry_vdw_refined	0.178
r_xyhbond_nbd_refined	0.168
r_chiral_restr	0.092
r_bond_refined_d	0.011
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8561
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
DM	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling