4HHF
Crystal Structure of chemically synthesized scorpion alpha-toxin OD1
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1SN1 | PDB ENTRY 1SN1 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7.5 | 277 | 1 uL 20 mg/mL lyophilized toxin in 2 mM hydrochloric acid + 1 uL reservoir (0.1 M Tris-HCl, pH 7.5, 2% v/v dioxane, 56-60% v/v MPD) against 500 uL reservoir (rod-shaped crystals appeared after 24 hours, grew to 0.5 x 0.1 x 0.1 mm), VAPOR DIFFUSION, HANGING DROP, temperature 277K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
3 | 59.02 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 48.727 | α = 90 |
b = 48.727 | β = 90 |
c = 63.245 | γ = 120 |
Symmetry | |
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Space Group | P 31 2 1 |
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 | 100 | CCD | RIGAKU SATURN 944 | 2012-05-14 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU FR-E+ SUPERBRIGHT | 1.54 |
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 | 1.58 | 35.1 | 97.2 | 0.039 | 22.1 | 3.21 | 8454 | 8431 | 11.76 |
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 | 1.58 | 1.64 | 95.6 | 0.325 | 1.5 | 1.54 |
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 | PDB ENTRY 1SN1 | 1.8 | 35.1 | 7763 | 397 | 96.75 | 0.18593 | 0.18511 | 0.20192 | RANDOM | 15.213 |
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] | |
0.01 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 40.395 |
r_dihedral_angle_3_deg | 13.215 |
r_dihedral_angle_4_deg | 8.025 |
r_dihedral_angle_1_deg | 6.504 |
r_angle_refined_deg | 2.671 |
r_chiral_restr | 0.298 |
r_bond_refined_d | 0.027 |
r_gen_planes_refined | 0.013 |
r_bond_other_d | |
r_angle_other_deg |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 501 |
Nucleic Acid Atoms | |
Solvent Atoms | 45 |
Heterogen Atoms | 24 |
Software
Software | |
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Software Name | Purpose |
CrystalClear | data collection |
PHASER | phasing |
REFMAC | refinement |
CrystalClear | data reduction |
CrystalClear | data scaling |