3BGX

E. coli Thymidylate Synthase C146S mutant complexed with dTMP and MTF

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	2.5 M ammonium sulfate, 20 mM KH2PO4, 4MM DTT, 4MM dTMP, 4MM methylene tetrahydrofolate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.83	56.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.03	α = 90
b = 72.03	β = 90
c = 115.46	γ = 120

Symmetry
Space Group	P 31 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	293	DIFFRACTOMETER	ENRAF-NONIUS FAST		1996-12-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	ENRAF-NONIUS FR571	1.5418

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	1.9	30	99	0.068	7	3.1	26908	26908

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	FOURIER SYNTHESIS	THROUGHOUT	1.93	30	22295	1187	87.58	0.18675	0.18441	0.23045	RANDOM	18.607

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]
-0.79	-0.4		-0.79		1.19

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.117
r_dihedral_angle_4_deg	18.993
r_dihedral_angle_3_deg	14.582
r_dihedral_angle_1_deg	6.589
r_scangle_it	2.771
r_scbond_it	1.806
r_angle_refined_deg	1.793
r_mcangle_it	1.114
r_angle_other_deg	1.056
r_mcbond_it	0.908
r_symmetry_vdw_other	0.293
r_chiral_restr	0.222
r_nbd_other	0.209
r_nbd_refined	0.206
r_symmetry_hbond_refined	0.201
r_nbtor_refined	0.185
r_xyhbond_nbd_refined	0.141
r_mcbond_other	0.126
r_symmetry_vdw_refined	0.123
r_nbtor_other	0.089
r_bond_refined_d	0.017
r_gen_planes_refined	0.007
r_bond_other_d	0.002
r_gen_planes_other	0.002
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2153
Nucleic Acid Atoms
Solvent Atoms	95
Heterogen Atoms	64

Software

Software
Software Name	Purpose
REFMAC	refinement
MADNESS	data collection
PROCOR	data reduction
corect	data scaling