1F4D

CRYSTAL STRUCTURE OF E. COLI THYMIDYLATE SYNTHASE C146S, L143C COVALENTLY MODIFIED AT C143 WITH N-[TOSYL-D-PROLINYL]AMINO-ETHANETHIOL

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, temperature 20.0K

Crystal Properties
Matthews coefficient	Solvent content
2.5	52

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 126.33	α = 90
b = 126.33	β = 90
c = 67.12	γ = 120

Symmetry
Space Group	P 63

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		1999-04-17	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	2.15	10	96.7	0.081	12.8	2.43	32045	32045			27.8

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	2.15	2.22	92.1		0.286	4.5	2.26	3046

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 (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	2.15	10	32045	32045	1609	96.7	0.2	0.2	0.196	0.267	random	37.8

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	28.5
p_staggered_tor	16.6
p_planar_tor	4.8
p_scangle_it	3.28
p_scbond_it	2.2
p_mcangle_it	1.98
p_mcbond_it	1.9
p_multtor_nbd	0.25
p_singtor_nbd	0.185
p_xyhbond_nbd	0.158

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4302
Nucleic Acid Atoms
Solvent Atoms	297
Heterogen Atoms	74

Software

Software
Software Name	Purpose
AMoRE	phasing
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.