3JQE

Crystal structure of pteridine reductase 1 (PTR1) from Trypanosoma brucei in ternary complex with cofactor (NADP+) and inhibitor 2-amino-6-(4-methoxyphenyl)-4-oxo-4,7-dihydro-3H-pyrrolo[2,3-d]pyrimidine-5-carbonitrile (DX8)

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2C7V	PDB entry 2C7V

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION		293	2-3M Sodium acetate, 10-100mM Sodium citrate, pH 4.0-6.0, VAPOR DIFFUSION, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.02	39.1

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.575	α = 90
b = 89.421	β = 115.56
c = 82.372	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU		2007-01-26		SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.54178

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	2	34.32	94.4	0.082	0.082	24.4	5		62121

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.11	88.1		0.221	0.221	2.4	4.9	8440

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 2C7V	2	34.32	62099	3179	94.16	0.155	0.152	0.213	RANDOM	16.37

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]
-2.64		-1.12	3.16		-1.49

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.261
r_dihedral_angle_4_deg	17.014
r_dihedral_angle_3_deg	14.3
r_dihedral_angle_1_deg	5.841
r_scangle_it	5.08
r_scbond_it	4.033
r_mcangle_it	2.741
r_mcbond_it	2.052
r_angle_refined_deg	1.431
r_nbtor_refined	0.298

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.261
r_dihedral_angle_4_deg	17.014
r_dihedral_angle_3_deg	14.3
r_dihedral_angle_1_deg	5.841
r_scangle_it	5.08
r_scbond_it	4.033
r_mcangle_it	2.741
r_mcbond_it	2.052
r_angle_refined_deg	1.431
r_nbtor_refined	0.298
r_symmetry_hbond_refined	0.222
r_nbd_refined	0.197
r_symmetry_vdw_refined	0.186
r_xyhbond_nbd_refined	0.162
r_chiral_restr	0.084
r_bond_refined_d	0.012
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7413
Nucleic Acid Atoms
Solvent Atoms	827
Heterogen Atoms	280

Software

Software
Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
XSCALE	data scaling
MOLREP	phasing

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.