3IMH

CRYSTAL STRUCTURE OF GALACTOSE 1-EPIMERASE FROM Lactobacillus acidophilus NCFM

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	294	100MM HEPES, 15%(V/V) ETHANOL, PH 7.5, 200MM MAGNESIUM CHLORIDE, 10% GLYCEROL, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 294K

Crystal Properties
Matthews coefficient	Solvent content
3.08	60.13

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 134.683	α = 90
b = 134.683	β = 90
c = 103.027	γ = 90

Symmetry
Space Group	P 4 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	90	CCD	ADSC QUANTUM 315	MIRRORS	2009-07-23	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X29A		NSLS	X29A

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	1.76	50	100	0.104	5.7	8.5		93817		-5	18.492

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	1.76	1.82	100		0.414	3.3	8.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	SAD	THROUGHOUT	1.76	20	90830	2823	99.99	0.1408	0.13991	0.16996	RANDOM	21.038

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]
-0.56			-0.56		1.13

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.595
r_dihedral_angle_4_deg	15.987
r_dihedral_angle_3_deg	12.885
r_scangle_it	8.03
r_dihedral_angle_1_deg	6.506
r_scbond_it	5.28
r_mcangle_it	3.721
r_mcbond_it	2.854
r_angle_refined_deg	1.248
r_nbtor_refined	0.302
r_symmetry_hbond_refined	0.184
r_nbd_refined	0.169
r_xyhbond_nbd_refined	0.151
r_symmetry_vdw_refined	0.145
r_chiral_restr	0.093
r_symmetry_metal_ion_refined	0.042
r_bond_refined_d	0.01
r_gen_planes_refined	0.005
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5248
Nucleic Acid Atoms
Solvent Atoms	997
Heterogen Atoms	54

Software

Software
Software Name	Purpose
SHELXCD	phasing
SHELXD	phasing
SHELXE	model building
REFMAC	refinement
DENZO	data reduction
HKL-2000	data scaling