7AEN
Galectin-8 N-terminal carbohydrate recognition domain in complex with methyl 3-O-((7-carboxy)quinolin-2-yl)-methoxy)-beta-D-galactopyranoside
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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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 | |
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Matthews coefficient | Solvent content |
2.01 | 38.85 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 54.452 | α = 90 |
b = 61.124 | β = 90 |
c = 84.712 | γ = 90 |
Symmetry | |
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Space Group | P 21 21 21 |
Diffraction
Diffraction Experiment | ||||||||||||||
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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 | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SLS BEAMLINE X06DA | 1.00003 | SLS | X06DA |
Data Collection
Overall | |||||||||||||||||||
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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 | 1.6 | 49.57 | 99.8 | 0.058 | 16.4 | 6.5 | 35999 |
Highest Resolution Shell | |||||||||||||||||||
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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 | 1.6 | 1.63 | 1.69 |
Refinement
Statistics | |||||||||||||||||||
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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 | 1.6 | 49.57 | 35999 | 1910 | 99.69 | 0.1428 | 0.13924 | 0.21154 | RANDOM | 32.446 |
Temperature Factor Modeling | ||||||
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Anisotropic B[1][1] | Anisotropic B[1][2] | Anisotropic B[1][3] | Anisotropic B[2][2] | Anisotropic B[2][3] | Anisotropic B[3][3] | |
-1.25 | 1.37 | -0.12 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 28.487 |
r_dihedral_angle_4_deg | 19.721 |
r_dihedral_angle_3_deg | 13.579 |
r_scangle_other | 7.847 |
r_long_range_B_refined | 7.821 |
r_long_range_B_other | 7.647 |
r_dihedral_angle_1_deg | 7.598 |
r_scbond_it | 6.517 |
r_scbond_other | 6.517 |
r_mcangle_it | 5.735 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2378 |
Nucleic Acid Atoms | |
Solvent Atoms | 247 |
Heterogen Atoms | 61 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
Coot | model building |
PHASER | phasing |
XDS | data reduction |
XDS | data scaling |