7R6G

Crystal structure of DfrA5 dihydrofolate reductase in complex with TRIMETHOPRIM and NADPH

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1RX2

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	277.15	23% to 25% PEG3350, 0.1M Mes pH 6.0, 0.3M LiSO4 and 2mM DTT

Crystal Properties
Matthews coefficient	Solvent content
3.02	59.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 99.53	α = 90
b = 99.53	β = 90
c = 42.82	γ = 90

Symmetry
Space Group	P 43

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 315r		2019-01-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	0.9795	NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	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	2.61	99.53	99.9	0.17	0.074	0.971	7.9	6.3		13057			35.09

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.61	2.73	100		0.497	0.591	2	6.5

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	1RX2	2.61	99.53	12280	742	99.63	0.18	0.1774	0.224	RANDOM	42.102

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]
0.81			0.81		-1.63

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.687
r_dihedral_angle_3_deg	18.593
r_dihedral_angle_4_deg	15.18
r_dihedral_angle_1_deg	9.401
r_angle_refined_deg	1.89
r_angle_other_deg	1.287
r_chiral_restr	0.073
r_bond_refined_d	0.012
r_gen_planes_refined	0.009
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.687
r_dihedral_angle_3_deg	18.593
r_dihedral_angle_4_deg	15.18
r_dihedral_angle_1_deg	9.401
r_angle_refined_deg	1.89
r_angle_other_deg	1.287
r_chiral_restr	0.073
r_bond_refined_d	0.012
r_gen_planes_refined	0.009
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2470
Nucleic Acid Atoms
Solvent Atoms	12
Heterogen Atoms	126

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	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.