1VDR

DIHYDROFOLATE REDUCTASE

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4DFR	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR
experimental model	PDB	5DFR	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR
experimental model	PDB	6DFR	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR
experimental model	PDB	7DFR	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR
experimental model	PDB	8DFR	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR
experimental model	PDB	3DFR	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.9		HANGING DROP VAPOR DIFFUSION. THE RESERVOIR SOLUTION CONTAINED 2.4M PHOSPHATE BUFFER (PH 7.8-8.0), 0.25-0.5% PEG 1000 AND 2MM METHOTREXATE. THE DROPS CONTAINED EQUAL VOLUMES OF RESERVOIR SOLUTION AND 10 MG/ML PROTEIN SOLUTION IN 0.1M PHOSPHATE BUFFER AT PH7.0., pH 7.9, vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
2.27	45.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.87	α = 90
b = 59.45	β = 95.8
c = 78.15	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	295	AREA DETECTOR	SIEMENS	COLLIMATOR	1990-01-21	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2.55	50	98	0.073	18.2	2.8		10496		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.55	2.71	89		0.271	2.4	1.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	SUPERPOSITION OF 7 MODELS: 4DFR, 5DFR, 6DFR, 7DFR, 8DFR, 3DFR, MODELED HV-DHFR	2.55	7	2	7800	794	75	0.184	0.184	0.3	RANDOM	26

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_angle_deg	3.2
x_bond_d	0.013
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2406
Nucleic Acid Atoms
Solvent Atoms	80
Heterogen Atoms	15

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
XENGEN	data reduction
XENGEN	data scaling
X-PLOR	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.