7P11

Galectin-8 N-terminal carbohydrate recognition domain in complex with quinoline D-galactal ligand

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5GZD

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIQUID DIFFUSION	8	293.5	Buffer (10mM Tris/HCl pH 8.0, 150 mM NaCl, 10 mm lactose and 1 mM TCEP) mixed with reservoir 25% (w/v) PEG 2000 monomethylethyer (MME), a cryo solution (10 mM Tris/HCl pH 8.0, 50 mM NaCl, 10 mM lactose, 25% (w/v) PEG 2000 MME, 20% ethylene glycol (EG) and 1 mM TCEP) and flash-frozen in liquid nitrogen. A co-crystal with lactose, grown from a seeded drop with 24% (w/v) PEG 2000 MME in the reservoir, was used to soak in compound 1 by transferring crystals in three steps to different soaking drops. First to a 2 ul drop with glycerol ( 20% (v/v) glycerol, 25% (w/v PEG 2000 MME, 10 mM Tris/HCl pH 8.0, 50 mM NaCl and 1 mM TCEP) and secondly to a 2 ul drop with 10 mM compound 1 (10 mM Tris/HCl pH 8.0, 50 mM NaCl, 5 mM compound 1, 25% (w/v) PEG 2000 MME and 1 mM TCEP) and thirdly to a second drop with 5 mM compound 1 (same composition as before).

Crystal Properties
Matthews coefficient	Solvent content
2.01	38.85

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 54.62	α = 90
b = 61.394	β = 90
c = 85.242	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	293.5	PIXEL	DECTRIS PILATUS 2M-F		2019-11-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06DA	1.00003	SLS	X06DA

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	2.1	46.03	99.91	0.144	8.8	6.4		16364

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	2.1	2.103			1.69

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	5GZD	2.1	46.03	16364	860	99.91	0.20826	0.20512	0.26304	RANDOM	47.102

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]
-2.2			4.99		-2.78

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.389
r_dihedral_angle_4_deg	21.787
r_dihedral_angle_3_deg	15.81
r_dihedral_angle_1_deg	7.929
r_long_range_B_refined	5.222
r_long_range_B_other	5.164
r_scangle_other	2.814
r_mcangle_it	2.619
r_mcangle_other	2.619
r_scbond_it	1.72
r_scbond_other	1.719
r_angle_refined_deg	1.609
r_mcbond_other	1.582
r_mcbond_it	1.581
r_angle_other_deg	1.234
r_chiral_restr	0.065
r_bond_refined_d	0.01
r_gen_planes_refined	0.007
r_bond_other_d	0.001
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	2386
Nucleic Acid Atoms
Solvent Atoms	160
Heterogen Atoms	49

Software

Software
Software Name	Purpose
REFMAC	refinement
Coot	model building
PHASER	phasing
XDS	data reduction
XDS	data scaling