1LTI
HEAT-LABILE ENTEROTOXIN (LT-I) COMPLEX WITH T-ANTIGEN
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | liquid - liquid diffusion | 7.5 | LIQUID-LIQUID DIFFUSION CAPILLARY CONTAINS: 0.1M TRIS PH 7.5, 0.1M NACL, 0.001M EDTA, 0.02% SODIUM AZIDE, 4.5 MG/ML LT-I, 0.025M LACTOSE AND 5% PEG 6000. CRYSTAL WAS SOAKED FOR 1 DAY IN LACTOSE FREE MOTHER LIQUOR CONTAINING 0.1M D-GAL-BETA1,3GALNAC BEFORE DATA COLLECTION., liquid - liquid diffusion |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.3 | 46 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 119.7 | α = 90 |
b = 100.5 | β = 90 |
c = 64.4 | 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 | 298 | IMAGE PLATE | RIGAKU RAXIS | 1995-12-10 | M |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 |
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 | 2.13 | 77 | 86.2 | 0.054 | 12.2 | 2.5 | 38264 |
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) | |||||||||||
2.13 | 2.25 | 73.5 | 0.16 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Cut-off Sigma (F) | 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 | FREE-R | 2.13 | 8 | 2 | 37447 | 86.5 | 0.185 | 0.185 | 0.274 | RANDOM | 33.9 |
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] | |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
x_dihedral_angle_d | 23 |
x_angle_deg | 1.96 |
x_improper_angle_d | 1.5 |
x_bond_d | 0.012 |
x_bond_d_na | |
x_bond_d_prot | |
x_angle_d | |
x_angle_d_na | |
x_angle_d_prot | |
x_angle_deg_na |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 5978 |
Nucleic Acid Atoms | |
Solvent Atoms | 183 |
Heterogen Atoms | 59 |
Software
Software | |
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Software Name | Purpose |
RAXIS | data collection |
RAXIS | data reduction |
X-PLOR | model building |
X-PLOR | refinement |
R-AXIS | data reduction |
R-AXIS | data scaling |
X-PLOR | phasing |