4KM0

Crystal structure of dihydrofolate reductase from Mycobacterium tuberculosis in complex with pyrimethamine

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	298	8% PEG 4000, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
1.98	37.99

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 32.32	α = 90
b = 63.45	β = 100.8
c = 78.12	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	MAR CCD 165 mm		2010-10-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06DA	1.00000	SLS	X06DA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.3	76.736	99.4	0.073	11.5	4.4	75734	75734	2	2

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	1.3	1.37	98.4		0.413	0.413	1.8	4.2	10884

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	1.3	17.98	75734	75684	3804	99.39	0.1553	0.1524	0.2102	RANDOM	13.8232

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]
0.01					-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.388
r_sphericity_free	29.382
r_dihedral_angle_4_deg	13.228
r_dihedral_angle_3_deg	12.574
r_sphericity_bonded	11.109
r_rigid_bond_restr	7.228
r_dihedral_angle_1_deg	6.578
r_angle_refined_deg	2.33
r_chiral_restr	0.155
r_bond_refined_d	0.024

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.388
r_sphericity_free	29.382
r_dihedral_angle_4_deg	13.228
r_dihedral_angle_3_deg	12.574
r_sphericity_bonded	11.109
r_rigid_bond_restr	7.228
r_dihedral_angle_1_deg	6.578
r_angle_refined_deg	2.33
r_chiral_restr	0.155
r_bond_refined_d	0.024
r_gen_planes_refined	0.018

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2508
Nucleic Acid Atoms
Solvent Atoms	458
Heterogen Atoms	96

Software

Software
Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
DNA	data collection
MOSFLM	data reduction
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.