5MGD

STRUCTURE OF E298Q-BETA-GALACTOSIDASE FROM ASPERGILLUS NIGER IN COMPLEX WITH 6-Galactosyl-lactose

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	291	26% (W/V) PEG 3350, 0.1M BIS-TRIS BUFFER pH 6.5, 0.2M LITHIUM SULPHATE, then soaked in 30mM 6-Galactosyl-lactose, and cryoprotected with 20% (W/V) PEG 400.

Crystal Properties
Matthews coefficient	Solvent content
2.42	49.12

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.285	α = 90
b = 105.873	β = 99.24
c = 83.715	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	PIXEL	DECTRIS PILATUS 6M	Kbmirrors	2016-03-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALBA BEAMLINE XALOC	1.127140	ALBA	XALOC

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	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	2.15	82.63	100	0.135	0.995	11.1	6.8		54536

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.15	2.21	99.8		0.596	0.936	4.2	6.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	5IFP	2.15	82.63	51732	2768	99.94	0.19273	0.19084	0.22741	RANDOM	28.762

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]
4.64		3.77	-4.06		-1.72

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.083
r_dihedral_angle_4_deg	13.738
r_dihedral_angle_3_deg	12.294
r_dihedral_angle_1_deg	6.621
r_long_range_B_refined	3.851
r_long_range_B_other	3.851
r_scangle_other	2.425
r_mcangle_it	1.938
r_mcangle_other	1.938
r_scbond_other	1.465
r_scbond_it	1.464
r_angle_refined_deg	1.408
r_mcbond_it	1.195
r_mcbond_other	1.194
r_angle_other_deg	0.931
r_chiral_restr	0.072
r_bond_refined_d	0.009
r_gen_planes_refined	0.005
r_bond_other_d	0.002
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7483
Nucleic Acid Atoms
Solvent Atoms	185
Heterogen Atoms	421

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
Aimless	data scaling
MOLREP	phasing