5TJO
Crystal structure of GTB + B trisaccharide (mercury derivative)
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1LZ7 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION | 277 | The first crystals of GTA/GTB were grown as mercury derivatives (Patenaude, S.I., et al. 2002): 10 ul drops with 6-8 mg/ml protein, 70 mM N-(2-acetamido)-2-iminodiacetic acid (ADA) pH 7.5, 50 mM, sodium acetate pH 4.6, 40 mM NaCl, 5-8 mM MnCl2, 2.5% (v/v) 2-methyl-2,4-pentanediol (MPD), 5%(v/v) glycerol, 2%(w/v) PEG 4000, and 0.3-0.5 mM 3-chloromercuri-2-methoxypropylurea suspended over 1 ml of a resevoir solution: 50 mM ADA pH 7.5, 10 mM MnCl2, 100 mM ammonium sulfate, 5%(v/v) MPD, 10%(v/v) glycerol, and 8-10%(w/v) PEG 4000. Crystals were washed with artificial mother liquor ML-1 consisting of 10% polyethylene glycol (PEG) 4000, 30 mM N-(2-acetamido)-2-iminodiacetic acid (ADA) buffer pH 7.5, 30 mM sodium acetate buffer pH 4.6, 100 mM ammonium sulfate, 10 mM MnCl2 and 30% glycerol as the cryoprotectant. Crystals of GTA/GTB in complex with the A and B trisaccharides were obtained by soaking them in mother liquor ML-1 with 30% glycerol and 45-50 mM substrates for 2-5 days at 18 degrees Celsius |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.27 | 45.76 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 52.71 | α = 90 |
b = 150.65 | β = 90 |
c = 79.18 | γ = 90 |
Symmetry | |
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Space Group | C 2 2 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 | 113 | IMAGE PLATE | RIGAKU RAXIS IV++ | 2009-04-16 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU MICROMAX-002 | 1.5418 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | 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 | 1.57 | 19.92 | 98.6 | 0.04 | 0.04 | 17.3 | 4.46 | 43816 |
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 | 1.57 | 1.63 | 98.1 | 0.317 | 3.7 | 3.7 |
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 | 1LZ7 | 1.57 | 19.92 | 41593 | 2213 | 98.52 | 0.1747 | 0.1736 | 0.1958 | RANDOM | 24.013 |
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] | |
-0.55 | 0.28 | 0.27 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 33.826 |
r_dihedral_angle_4_deg | 17.018 |
r_dihedral_angle_3_deg | 11.055 |
r_dihedral_angle_1_deg | 6.2 |
r_mcangle_it | 2.155 |
r_angle_refined_deg | 1.5 |
r_mcbond_it | 1.404 |
r_mcbond_other | 1.394 |
r_angle_other_deg | 1.152 |
r_chiral_restr | 0.086 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2109 |
Nucleic Acid Atoms | |
Solvent Atoms | 200 |
Heterogen Atoms | 45 |
Software
Software | |
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Software Name | Purpose |
d*TREK | data scaling |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
d*TREK | data reduction |
PHASER | phasing |