1MXH

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

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1MXF	INHIBITOR COMPLEX SOLVED BY MAD METHOD (PDBID 1MXF)

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	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	0.2	0.251	0.25	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

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

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 R01GM157729.