3RU4
Crystal structure of the Bowman-Birk serine protease inhibitor BTCI in complex with trypsin and chymotrypsin
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 7.5 | 294 | 0.1 M HEPES pH 7.5, 10%(w/v) polyethylene glycol (PEG) 6000, 5%(v/v) 2-methyl-2,4-pentanediol (MPD), VAPOR DIFFUSION, SITTING DROP, temperature 294K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.92 | 57.84 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 49.477 | α = 67.28 |
b = 54.571 | β = 71.04 |
c = 69.286 | γ = 73.55 |
Symmetry | |
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Space Group | P 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 | MAR CCD 165 mm | mirrors | 2007-03-30 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | LNLS BEAMLINE D03B-MX1 | 1.4270 | LNLS | D03B-MX1 |
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 | 1.675 | 62.02 | 80.6 | 0.099 | 11.87 | 2 | 57400 | 57400 |
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 | 1.675 | 1.74 | 27.2 | 0.37 | 1.28 | 1.2 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (All) | 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 ENTRIES 2G81 AND 4CHA | 1.68 | 62.02 | 54466 | 54466 | 2899 | 80.22 | 0.15901 | 0.1572 | 0.19249 | RANDOM | 23.518 |
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] | |
0.38 | -0.06 | 1.17 | -0.76 | 0.57 | -0.78 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 36.026 |
r_dihedral_angle_4_deg | 24.568 |
r_dihedral_angle_3_deg | 14.348 |
r_dihedral_angle_1_deg | 7.222 |
r_scangle_it | 3.879 |
r_scbond_it | 2.833 |
r_angle_refined_deg | 2.24 |
r_mcangle_it | 1.605 |
r_mcbond_it | 1.058 |
r_chiral_restr | 0.129 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3834 |
Nucleic Acid Atoms | |
Solvent Atoms | 694 |
Heterogen Atoms | 122 |
Software
Software | |
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Software Name | Purpose |
MOLREP | phasing |
REFMAC | refinement |
HKL-2000 | data reduction |
SCALEPACK | data scaling |