3JQF

Crystal structure of pteridine reductase 1 (PTR1) from Trypanosoma brucei in ternary complex with cofactor (NADP+) and inhibitor 1,3,5-triazine-2,4,6-triamine (AX2)

X-RAY DIFFRACTION

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
2.04	39.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 74.549	α = 90
b = 90.241	β = 115.57
c = 82.407	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	CCD	ADSC QUANTUM 4	Vertically focusing mirror, Rh coated, water cooled	2006-09-17		SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.1	1.48800	SRS	PX14.1

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	1.6	23.38	92.5	0.034	0.034	12.4	3		119467

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	1.6	1.69	88		0.347	0.347	2.1	3.2	16541

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	1.6	23.38	119437	5999	92.18	0.147	0.145	0.186	RANDOM	21.438

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]
-1.35		-0.76	1.94		-1.24

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.939
r_dihedral_angle_4_deg	18.725
r_dihedral_angle_3_deg	13.237
r_dihedral_angle_1_deg	5.739
r_scangle_it	5.442
r_scbond_it	3.975
r_mcangle_it	2.735
r_mcbond_it	2.041
r_angle_refined_deg	1.601
r_nbtor_refined	0.301

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.939
r_dihedral_angle_4_deg	18.725
r_dihedral_angle_3_deg	13.237
r_dihedral_angle_1_deg	5.739
r_scangle_it	5.442
r_scbond_it	3.975
r_mcangle_it	2.735
r_mcbond_it	2.041
r_angle_refined_deg	1.601
r_nbtor_refined	0.301
r_symmetry_vdw_refined	0.24
r_nbd_refined	0.209
r_symmetry_hbond_refined	0.199
r_xyhbond_nbd_refined	0.187
r_chiral_restr	0.099
r_bond_refined_d	0.017
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7405
Nucleic Acid Atoms
Solvent Atoms	1059
Heterogen Atoms	336

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection

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 R01GM133198.