Experiment: 3EBU

Replacement of Val3 in Human Thymidylate Synthase Affects Its Kinetic Properties and Intracellular Stability

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1HW3	PDB ENTRY 1HW3

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	277	0.1M Tris PH8.5, 35-40%ammonium sulfate, 20mM BME, pH 8.5 , VAPOR DIFFUSION, HANGING DROP, temperature 277.0K

Crystal Properties
Matthews coefficient	Solvent content
3.01	59.15

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 95.616	α = 90
b = 95.616	β = 90
c = 81.616	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		CCD	MARMOSAIC 225 mm CCD		2006-06-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.0	APS	22-ID

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	2.05	50	95.2	0.063	49.95	5.4		26097

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)
	2.05	2.12	76.5		0.224		5.1	2084

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION		PDB ENTRY 1HW3	2.05	50	25503	2524	86.4	0.227	0.2169	0.26	59.635

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]
-13.938			-13.938		27.875

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	4.278
c_scbond_it	3.082
c_mcangle_it	2.806
c_mcbond_it	1.886
c_angle_d	1.184
c_bond_d	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2114
Nucleic Acid Atoms
Solvent Atoms	180
Heterogen Atoms	19

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing