3F8Z

Human Dihydrofolate Reductase Structural Data with Active Site Mutant Enzyme Complexes

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.9	287	100 mM potassium phosphate, pH 6.9, 60% ammonium sulfate, 3% ethanol, VAPOR DIFFUSION, HANGING DROP, temperature 287K

Crystal Properties
Matthews coefficient	Solvent content
2.51	51.02

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 84.416	α = 90
b = 84.416	β = 90
c = 77.934	γ = 120

Symmetry
Space Group	H 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	IMAGE PLATE	RIGAKU RAXIS IV	mirrors	2008-03-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5418

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	1.68	26.25	74.8	0.071	0.039	16.3	3.9		17593	2	1	32.56

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	1.68	1.77	17		0.297	0.261	1.3	1.7	590

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	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	1u72	2.01	26.66	1	2	12666	12666	705	97.02	0.16351	0.16055	0.21877	RANDOM	19.993

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		0.01		-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.318
r_dihedral_angle_3_deg	14.986
r_dihedral_angle_4_deg	13.625
r_dihedral_angle_1_deg	6.329
r_scangle_it	3.911
r_scbond_it	2.711
r_angle_refined_deg	1.969
r_mcangle_it	1.645
r_mcbond_it	1.073
r_symmetry_hbond_refined	0.313

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.318
r_dihedral_angle_3_deg	14.986
r_dihedral_angle_4_deg	13.625
r_dihedral_angle_1_deg	6.329
r_scangle_it	3.911
r_scbond_it	2.711
r_angle_refined_deg	1.969
r_mcangle_it	1.645
r_mcbond_it	1.073
r_symmetry_hbond_refined	0.313
r_nbtor_refined	0.304
r_nbd_refined	0.219
r_xyhbond_nbd_refined	0.213
r_symmetry_vdw_refined	0.19
r_chiral_restr	0.152
r_bond_refined_d	0.018
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1497
Nucleic Acid Atoms
Solvent Atoms	276
Heterogen Atoms	98

Software

Software
Software Name	Purpose
CrystalClear	data collection
MOLREP	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.