1A3K

X-RAY CRYSTAL STRUCTURE OF THE HUMAN GALECTIN-3 CARBOHYDRATE RECOGNITION DOMAIN (CRD) AT 2.1 ANGSTROM RESOLUTION

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5		PROTEIN CRYSTALLIZED BY HANGING-DROP VAPOUR DIFFUSION METHOD FROM DROPS CONTAINING EQUAL VOLUMES OF PROTEIN(10-15MG/ML) IN CRYSTALLIZATION BUFFER CONTAINING 1MM LACTOSE OR 30 MM N-ACETYLLACTOSAMINE AND THE WELL SOLUTION COMPOSED OF 27-30% PEG 4000-6000, 100MM TRIS-HCL PH 8.5, 100 MM MGCL2, AND 8 MM 2-MERCAPTOETHANOL., vapor diffusion - hanging drop

Crystal Properties
Matthews coefficient	Solvent content
2.25	48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 37.6	α = 90
b = 58.4	β = 90
c = 64	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	287	AREA DETECTOR	SIEMENS		1994-12-19	M

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

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	1.9	25	99	0.052				7955

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MULTIPLE ISOMORPHOUS METHOD	2.1	5	2		99	0.17	0.17	0.24	RANDOM	20.6

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
x_angle_deg	1.7
x_bond_d	0.01
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1101
Nucleic Acid Atoms
Solvent Atoms	120
Heterogen Atoms	26

Software

Software
Software Name	Purpose
PHASES	phasing
X-PLOR	model building
X-PLOR	refinement
XDS	data reduction
X-PLOR	phasing