1KAG
Crystal Structure of the Escherichia coli Shikimate Kinase I (AroK)
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.5 | 295 | 30% PEG 5000 MME, 0.2M ammonium sulfate, 0.1M MES pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 295K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
1.97 | 37.43 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 35.726 | α = 90 |
b = 63.417 | β = 91.27 |
c = 67.941 | 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 | MARRESEARCH | 2001-08-03 | M | SINGLE WAVELENGTH | ||||||
2 | 1 | x-ray | 100 | CCD | MARRESEARCH | 2001-10-21 | M | MAD |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | NSLS BEAMLINE X9A | 0.97962 | NSLS | X9A |
2 | SYNCHROTRON | NSLS BEAMLINE X9A | 0.98167, 0.98147 | NSLS | X9A |
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 | 2.05 | 20 | 97.5 | 0.031 | 19149 | 19149 | 10.2 |
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) | |||||||||||
2.03 | 2.13 | 99.9 | 0.049 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | 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 | MAD | THROUGHOUT | 2.05 | 19.58 | 18666 | 18666 | 1874 | 97.5 | 0.2216 | 0.217 | 0.217 | 0.271 | RANDOM | 23.9 |
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] | |
2.41 | 0.58 | 1.41 | -3.82 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
c_dihedral_angle_d | 20.5 |
c_scangle_it | 7.08 |
c_scbond_it | 5.42 |
c_mcangle_it | 4.37 |
c_mcbond_it | 3.59 |
c_angle_deg | 1.7 |
c_improper_angle_d | 0.93 |
c_bond_d | 0.011 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2414 |
Nucleic Acid Atoms | |
Solvent Atoms | 258 |
Heterogen Atoms |
Software
Software | |
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Software Name | Purpose |
SnB | phasing |
MLPHARE | phasing |
DM | model building |
CNS | refinement |
MARMAD | data reduction |
DENZO | data reduction |
SCALEPACK | data scaling |
DM | phasing |