3B9H

E. coli thymidylate synthase complexed with 5-NITRO-2'-DEOXY URIDINE

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	2.1 M ammonium sulfate, 20 mM KH2PO4, 4 mM DTT, 4 mM 5-nitro-dump, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.79	55.95

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.6	α = 90
b = 71.6	β = 90
c = 115.32	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	graphite crystal monochrometer	1997-06-26	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 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	2.49	30	93	0.14	10.2	5.3	12433	11592

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	FOURIER SYNTHESIS	THROUGHOUT	1TSN	2.49	30	11592	11592	699	93.24	0.17224	0.1682	0.23262	RANDOM	26.359

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]
0.15	0.07		0.15		-0.22

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.205
r_dihedral_angle_4_deg	20.548
r_dihedral_angle_3_deg	18.4
r_dihedral_angle_1_deg	6.835
r_scangle_it	3.981
r_scbond_it	2.431
r_angle_refined_deg	1.71
r_mcangle_it	1.569
r_mcbond_it	0.864
r_nbtor_refined	0.316
r_nbd_refined	0.232
r_symmetry_vdw_refined	0.147
r_xyhbond_nbd_refined	0.129
r_chiral_restr	0.113
r_symmetry_hbond_refined	0.093
r_bond_refined_d	0.016
r_gen_planes_refined	0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_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	55
Heterogen Atoms	33

Software

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