3S7A

Human dihydrofolate reductase binary complex with PT684

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.9	287	30% ammonium sulfate, 100 mM K2PO4, pH 6.9, VAPOR DIFFUSION, HANGING DROP, temperature 287K

Crystal Properties
Matthews coefficient	Solvent content
2.28	46.14

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.588	α = 90
b = 55.106	β = 90
c = 64.827	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	113	CCD	MARMOSAIC 325 mm CCD	mirrors	2011-04-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.975	SSRL	BL9-2

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	1.8	42	95.4	0.23	0.094	7.7	6.7	18704	18704	2	2	33.2

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	1.8	1.9	74.7		0.31	0.157	2.6	4.6	1964

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	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	PDB ENTRY 1U72	1.8	42	2	17829	16884	905	95.11	0.23916	0.23686	0.2835	RANDOM	24.003

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	40.357
r_dihedral_angle_3_deg	19.273
r_dihedral_angle_4_deg	14.324
r_dihedral_angle_1_deg	7.427
r_scangle_it	5.134
r_scbond_it	3.601
r_mcangle_it	2.24
r_angle_refined_deg	2.055
r_mcbond_it	1.289
r_chiral_restr	0.162
r_bond_refined_d	0.022
r_gen_planes_refined	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1502
Nucleic Acid Atoms
Solvent Atoms	21
Heterogen Atoms	60

Software

Software
Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling