3N5E

Crystal Structure of human thymidylate synthase bound to a peptide inhibitor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.3	293	25% saturated Ammonium Sulfate, 20mM BME, 0.1M TRIS pH8.3, VAPOR DIFFUSION, SITTING DROP, temperature 293.0K

Crystal Properties
Matthews coefficient	Solvent content
2.9	57.61

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 96.109	α = 90
b = 96.109	β = 90
c = 82.24	γ = 120

Symmetry
Space Group	P 31

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	ADSC QUANTUM 315r		2008-02-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-1	0.947	ESRF	ID23-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.26	83.33	99.8	0.071	0.071	25.9	11		39745	1	2	45.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.26	2.38	100		0.303	0.303	6.7	11.2	5857

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1YPV	2.26	83.23	2	1	39745	37678	1990	99.72	0.2047	0.18939	0.18768	0.22136	RANDOM	30.258

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
r_dihedral_angle_2_deg	37.816
r_dihedral_angle_4_deg	17.694
r_dihedral_angle_3_deg	16.669
r_dihedral_angle_1_deg	6.821
r_scangle_it	3.74
r_scbond_it	2.315
r_mcangle_it	1.565
r_angle_refined_deg	1.496
r_mcbond_it	0.802
r_chiral_restr	0.11
r_bond_refined_d	0.014
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4339
Nucleic Acid Atoms
Solvent Atoms	255
Heterogen Atoms	20

Software

Software
Software Name	Purpose
ADSC	data collection
MOLREP	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling