2G89

L. casei thymidylate synthase Y261A in complex with substrate, dUMP

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	295	protein in 20mM KPO4 buffer with 15-20mM ammonium sulfate, DTT and 38mM dUMP, against 20mM KPO4 buffer alone, VAPOR DIFFUSION, HANGING DROP, temperature 295K, pH 7.00

Crystal Properties
Matthews coefficient	Solvent content
2.94	58.16

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.61	α = 90
b = 78.61	β = 90
c = 240.97	γ = 120

Symmetry
Space Group	P 61 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	295	IMAGE PLATE	RIGAKU RAXIS IIC		1996-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.4	39.34	78	11.5			14146		-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.4	2.55	64.2

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	2.5	39.34	12873	12873	1320	79.8	0.182	0.182	0.248	RANDOM	45.3

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]
-1.48	-0.12		-1.48		2.96

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	26
c_scangle_it	4.33
c_scbond_it	2.98
c_angle_deg	2.5
c_mcangle_it	2.42
c_improper_angle_d	2.15
c_mcbond_it	1.4
c_bond_d	0.026
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2586
Nucleic Acid Atoms
Solvent Atoms	65
Heterogen Atoms	20

Software

Software
Software Name	Purpose
CNS	refinement
CCP4	data scaling
CNS	phasing