3Q2O
Crystal Structure of purK: N5-carboxyaminoimidazole ribonucleotide synthetase
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 3K5I | homology model of 3K5I |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.5 | 298 | 0.1M MES, 5mM DTT, 9% glycerol, 10% PEG6000, Hampton Research Silver Bullet Bio additive B5/17, pH 6.5, vapor diffusion, hanging drop, temperature 298K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.28 | 46.11 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 57.43 | ¦Á = 90 |
b = 82.445 | ¦Â = 90 |
c = 166.621 | ¦Ã = 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 | 100 | CCD | MARMOSAIC 300 mm CCD | 2010-12-02 | M | SINGLE WAVELENGTH | ||||||
2 | 1 | x-ray | 100 | CCD | ADSC QUANTUM 315 | 2010-08-05 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 22-ID | 1.00 | APS | 22-ID |
2 | SYNCHROTRON | APS BEAMLINE 24-ID-E | 0.9791 | APS | 24-ID-E |
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 | 1.96 | 20 | 96.9 | 0.106 | 14.67 | 7.6 | 56242 | 56242 | -3 | -3 | 34.171 |
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) | |||||||||||
1,2 | 1.96 | 2.07 | 81.3 | 0.75 | 2.7 | 4.9 | 7484 |
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 | homology model of 3K5I | 1.96 | 19.96 | 53364 | 53364 | 2848 | 97.08 | 0.1973 | 0.1973 | 0.1952 | 0.2352 | RANDOM | 28.5343 |
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] | |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 41.207 |
r_dihedral_angle_3_deg | 13.967 |
r_dihedral_angle_4_deg | 12.728 |
r_dihedral_angle_1_deg | 5.341 |
r_scangle_it | 2.93 |
r_scbond_it | 1.686 |
r_mcangle_it | 1.233 |
r_angle_refined_deg | 1.109 |
r_mcbond_it | 0.655 |
r_chiral_restr | 0.075 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 5876 |
Nucleic Acid Atoms | |
Solvent Atoms | 379 |
Heterogen Atoms | 2 |
Software
Software | |
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Software Name | Purpose |
XSCALE | data scaling |
PHASER | phasing |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
MAR345dtb | data collection |
XDS | data reduction |
XDS | data scaling |