4P66
Electrostatics of Active Site Microenvironments of E. coli DHFR
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 6.5 | 293 | 100 mM Calcium Acetate 34% PEG 400 100 mM HEPES |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.11 | 41.72 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 34.411 | α = 90 |
b = 44.861 | β = 90 |
c = 98.428 | γ = 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 | ADSC QUANTUM 210 | 2013-07-12 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | CHESS BEAMLINE A1 | 0.978 | CHESS | A1 |
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 | 1.83 | 50 | 97.3 | 0.107 | 16.7 | 3.9 | 13385 |
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 | 1.83 | 1.86 | 93.8 | 0.311 | 3.5 | 640 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | 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 | 4GH8 | 1.84 | 49.21 | 13352 | 668 | 96.72 | 0.1901 | 0.1881 | 0.2293 | RANDOM | 17.67 |
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] | |
-0.41 | 1.02 | -0.61 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 36.705 |
r_dihedral_angle_3_deg | 13.479 |
r_dihedral_angle_4_deg | 10.051 |
r_dihedral_angle_1_deg | 5.617 |
r_scangle_it | 3.632 |
r_scbond_it | 2.302 |
r_mcangle_it | 1.67 |
r_angle_refined_deg | 1.531 |
r_angle_other_deg | 1.084 |
r_mcbond_it | 0.884 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 1239 |
Nucleic Acid Atoms | |
Solvent Atoms | 88 |
Heterogen Atoms | 83 |
Software
Software | |
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Software Name | Purpose |
HKL-2000 | data reduction |
REFMAC | refinement |
PDB_EXTRACT | data extraction |