1LU0
Atomic Resolution Structure of Squash Trypsin Inhibitor: Unexpected Metal Coordination
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.5 | 293 | PEG 8000, zinc sulfate, cacodylate, MPD, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.23 | 44.8 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 47.28 | α = 90 |
b = 58.63 | β = 90 |
c = 19.32 | γ = 90 |
Symmetry | |
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Space Group | P 21 21 2 |
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 | MARRESEARCH | 2000-04-07 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | EMBL/DESY, HAMBURG BEAMLINE BW7A | 0.8919 | EMBL/DESY, HAMBURG | BW7A |
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 | 1.03 | 15 | 99.2 | 0.047 | 30.7 | 9.3 | 27045 | 27045 | -3 | 12.9 |
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 | 1.03 | 1.07 | 98.3 | 0.151 | 2.73 | 3.5 | 2637 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | Cut-off Sigma (I) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | ||
X-RAY DIFFRACTION | Dual-space recycling | FREE R | 1.03 | 10 | -3 | 26990 | 26990 | 1345 | 99.1 | 0.1206 | 0.1206 | 0.12 | 0.13 | 0.1449 | 0.13 | RANDOM |
Coordinate Error | ||
---|---|---|
Structure Solution Method | Refinement High Resolution | Refinement Low Resolution |
5 | 432 | 517.49 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
s_non_zero_chiral_vol | 0.13 |
s_zero_chiral_vol | 0.106 |
s_approx_iso_adps | 0.091 |
s_similar_adp_cmpnt | 0.056 |
s_angle_d | 0.039 |
s_from_restr_planes | 0.031 |
s_bond_d | 0.025 |
s_rigid_bond_adp_cmpnt | 0.006 |
s_similar_dist | |
s_anti_bump_dis_restr |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 444 |
Nucleic Acid Atoms | |
Solvent Atoms | 76 |
Heterogen Atoms | 24 |
Software
Software | |
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Software Name | Purpose |
DENZO | data reduction |
SCALEPACK | data scaling |
SHELXD | phasing |
SHELXL-97 | refinement |