Experiment: 2QUL

Crystal structure of D-tagatose 3-epimerase from Pseudomonas cichorii at 1.79 A resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2OU4	PDB ENTRY 2OU4

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	298	20% PEG 10000, 0.1M HEPES, 0.1M tri-sodium citrate , pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.36	47.84

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 49.439	α = 90
b = 139.335	β = 104.78
c = 92.495	γ = 90

Symmetry
Space Group	P 1 21 1

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 4		2007-03-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-17A	1.0	Photon Factory	BL-17A

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	1.79	50	99.4	0.053	17.3	3.7	113364	113364			14.4

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)
	1.79	1.85	98.3		0.25	5.7	3.4	11178

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 2OU4	1.79	47.5	110404	110404	11034	97.2	0.179	0.176	0.176	0.1761	0.203	0.2025	RANDOM	18.2

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]
0.91		0.28	-1.77		0.86

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.9
c_angle_deg	1.3
c_improper_angle_d	0.78
c_bond_d	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9152
Nucleic Acid Atoms
Solvent Atoms	1084
Heterogen Atoms	4

Software

Software
Software Name	Purpose
CNS	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing