2A0M

Arginase superfamily protein from Trypanosoma cruzi

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		low resolution SAD structure

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4	298	0.4 ul protein 8.7 mg/ml, 0.4 ul crystallization buffer, 100mM potassium bromide, 42% PEG 1000, 100mM Na citrate, pH 4.0, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.97	37.45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 128.875	α = 90
b = 128.875	β = 90
c = 42.671	γ = 120

Symmetry
Space Group	H 3

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 210		2004-12-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.1	1.0000	ALS	5.0.1

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	1.6	50	94.6	0.067	10.952	5.2		32939

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)
1	1.6	1.66		57.2	0.537	0.997

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	low resolution SAD structure	1.603	39.873	32939	1646	94.928	0.168	0.1954	random	18.897

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]
					0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.604
r_dihedral_angle_4_deg	14.548
r_dihedral_angle_3_deg	10.748
r_dihedral_angle_1_deg	5.942
r_scangle_it	3.208
r_scbond_it	2.44
r_mcangle_it	1.375
r_angle_refined_deg	1.343
r_scangle_other	1.249
r_mcbond_it	1.221
r_angle_other_deg	0.833
r_scbond_other	0.784
r_mcangle_other	0.632
r_symmetry_vdw_other	0.246
r_symmetry_vdw_refined	0.242
r_mcbond_other	0.226
r_nbd_refined	0.219
r_nbd_other	0.186
r_nbtor_refined	0.175
r_xyhbond_nbd_refined	0.15
r_symmetry_hbond_refined	0.106
r_chiral_restr	0.081
r_nbtor_other	0.081
r_bond_refined_d	0.013
r_gen_planes_refined	0.005
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2286
Nucleic Acid Atoms
Solvent Atoms	202
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
PDB_EXTRACT	data extraction
MOLREP	phasing