2GFT

Crystal structure of the E263A nucleophile mutant of Bacillus licheniformis endo-beta-1,4-galactanase in complex with galactotriose

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		296	24-35% (w/v) PEG 1500 Soak: few seconds, 0.3-0.5 M methyl- (1 4)-galactotetraoside, 15% PEG 1500 and 15% PEG 400., VAPOR DIFFUSION, HANGING DROP, temperature 296K

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 50.273	α = 90
b = 79.354	β = 100.56
c = 103.906	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	MAR CCD 165 mm		2004-03-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I711		MAX II	I711

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	2.3	30	88	0.064				31812

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)
	2.3	2.38	81.9		0.346

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	FOURIER SYNTHESIS	THROUGHOUT	2.3	30	30191	1606	87.25	0.18253	0.17985	0.23156	RANDOM	32.164

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]
-0.25		1.56	2.71		-1.88

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.685
r_dihedral_angle_4_deg	25.974
r_dihedral_angle_3_deg	15.947
r_dihedral_angle_1_deg	5.858
r_scangle_it	2.449
r_scbond_it	1.533
r_angle_refined_deg	1.293
r_mcangle_it	1.022
r_mcbond_it	0.604
r_nbtor_refined	0.304
r_symmetry_vdw_refined	0.238
r_nbd_refined	0.203
r_xyhbond_nbd_refined	0.155
r_symmetry_hbond_refined	0.138
r_metal_ion_refined	0.131
r_chiral_restr	0.089
r_bond_refined_d	0.012
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_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
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	5997
Nucleic Acid Atoms
Solvent Atoms	294
Heterogen Atoms	70

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling