1MXH

Crystal Structure of Substrate Complex of Putative Pteridine Reductase 2 (PTR2) from Trypanosoma cruzi

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5	293	Sodium acetate, cacodylate buffer, pH 6.50, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.61	α = 90
b = 74.61	β = 90
c = 181.26	γ = 120

Symmetry
Space Group	P 31

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	103	CCD	MARRESEARCH	MIRRORS	2000-12-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID		APS	17-ID

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	1.77	36	79.8	0.025	12.4	1.9		87817			17.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	INHIBITOR COMPLEX SOLVED BY MAD METHOD (PDBID 1MXF)	2.2	19.45	1	55984	55590	2799	97.2	0.205	0.205	0.251	RANDOM	31.1

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]
-0.36	2.45		-0.36		0.72

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.5
c_scangle_it	3.1
c_scbond_it	2.18
c_mcangle_it	2.06
c_angle_deg	1.32
c_mcbond_it	1.32
c_improper_angle_d	0.87
c_bond_d	0.007
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7380
Nucleic Acid Atoms
Solvent Atoms	457
Heterogen Atoms	308

Software

Software
Software Name	Purpose
HKL-2000	data collection
X-GEN	data reduction
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction
X-GEN	data scaling