3C1F
Crystal structure of Staphylococcal nuclease variant Delta+PHS V104K at cryogenic temperature
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7 | 277 | 40% MPD, 25 mM Potassium Phosphate, Calcium Chloride, pdTp, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.22 | 44.57 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 31.079 | α = 90 |
b = 60.518 | β = 93.064 |
c = 38.22 | γ = 90 |
Symmetry | |
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Space Group | P 1 21 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 | BRUKER APEX II | multi-layer optics | 2007-06-20 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SEALED TUBE | OTHER | 1.5418 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym 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 | 21.88 | 100 | 0.0761 | 0.0364 | 19.51 | 13.42 | 9648 | 9646 | 34.2 |
Highest Resolution Shell | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||
2 | 2.1 | 100 | 0.4489 | 0.3477 | 2.8 | 6.29 | 1307 |
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 (All) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | ||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 1TQO.PDB where all waters removed, all Bs=20.0 A^2, V104A, and E92A | 2 | 21.88 | 9617 | 8525 | 853 | 88.65 | 0.211 | 0.216 | 0.211 | 0.261 | RANDOM | 29.683 |
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 | 0.02 | -0.01 | 0.01 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 36.912 |
r_dihedral_angle_4_deg | 17.661 |
r_dihedral_angle_3_deg | 15.809 |
r_dihedral_angle_1_deg | 6.148 |
r_scangle_it | 3.336 |
r_scbond_it | 2.157 |
r_angle_refined_deg | 1.914 |
r_mcangle_it | 1.497 |
r_mcbond_it | 0.912 |
r_nbtor_refined | 0.308 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 1041 |
Nucleic Acid Atoms | |
Solvent Atoms | 54 |
Heterogen Atoms | 26 |
Software
Software | |
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Software Name | Purpose |
SAINT | data scaling |
PHASER | phasing |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
APEX | data collection |
SAINT | data reduction |