1F4B

CRYSTAL STRUCTURE OF ESCHERICHIA COLI THYMIDYLATE SYNTHASE

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	293	2.0 M ammonium sulphate, 20 mM potassium phosphate, 0.2 M EDTA, pH 7.0, VAPOR DIFFUSION, HANGING DROP

Crystal Properties
Matthews coefficient	Solvent content
3.09	60

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 131.17	α = 90
b = 131.17	β = 90
c = 131.17	γ = 90

Symmetry
Space Group	I 21 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IV		1999-12-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH3R

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	1.75	10	96.7	0.049	20.5	2.8	36586	36586			31.9

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)
1	1.75	1.81	91.6		0.338	4	2	3443

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	1.75	10	36586	36586	1838	96.7	0.2	0.2	0.198	0.244	random	37.15

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
p_transverse_tor	29.9
p_staggered_tor	15.3
p_planar_tor	3.7
p_scangle_it	2.73
p_mcangle_it	1.95
p_scbond_it	1.72
p_mcbond_it	1.3
p_multtor_nbd	0.242
p_singtor_nbd	0.178
p_xhyhbond_nbd	0.155

RMS Deviations
Key	Refinement Restraint Deviation
p_transverse_tor	29.9
p_staggered_tor	15.3
p_planar_tor	3.7
p_scangle_it	2.73
p_mcangle_it	1.95
p_scbond_it	1.72
p_mcbond_it	1.3
p_multtor_nbd	0.242
p_singtor_nbd	0.178
p_xhyhbond_nbd	0.155
p_xyhbond_nbd	0.155
p_chiral_restr	0.109
p_planar_d	0.037
p_angle_d	0.029
p_bond_d	0.01
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2153
Nucleic Acid Atoms
Solvent Atoms	262
Heterogen Atoms	27

Software

Software
Software Name	Purpose
REFMAC	refinement
d*TREK	data scaling

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.