1TSN

THYMIDYLATE SYNTHASE TERNARY COMPLEX WITH FDUMP AND METHYLENETETRAHYDROFOLATE

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		TS.FDUMP.CB3717

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	8		CRYSTALLIZED BY VAPOR DIFFUSION FROM A SOLUTION OF 8MG/ML PROTEIN, 2MM FDUMP, 10MM CH2THF, 20MM PHOSPHATE PH 8.0, 4MM DTT, AND 1.05M AMMONIUM SULFATE; EQUILIBRATED AGAINST A SOLUTION OF 2.10M AMMONIUM SULFATE, 20MM PHOSPHATE PH 8.0, AND 4MM DTT., vapor diffusion

Crystal Properties
Matthews coefficient	Solvent content
2.83	56.52

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.1	α = 90
b = 72.1	β = 90
c = 115.27	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	298	DIFFRACTOMETER	ENRAF-NONIUS FAST		1996-05-16	M

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

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	2.2	9	98.4	0.095	6.4	4.1		18104

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.29	98.5		0.355	1.9	3.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	TS.FDUMP.CB3717	2.2	9	18104	18104		98	0.178		21

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	29.3
p_staggered_tor	17.2
p_scangle_it	3.654
p_planar_tor	3.5
p_mcangle_it	2.417
p_scbond_it	2.278
p_mcbond_it	1.603
p_chiral_restr	0.223
p_multtor_nbd	0.214
p_singtor_nbd	0.21
p_angle_d	0.05
p_planar_d	0.041
p_bond_d	0.019
p_plane_restr	0.016
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_xyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2153
Nucleic Acid Atoms
Solvent Atoms	110
Heterogen Atoms	59

Software

Software
Software Name	Purpose
GPRLSA	refinement
MADNES	data reduction
PROCOR	data scaling