3KJS
Crystal Structure of T. cruzi DHFR-TS with 3 high affinity DHFR inhibitors: DQ1 inhibitor complex
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 2H2Q |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7 | 298 | 50mM Hepes, pH 7.0, 10mM magnesium chloride, 1.5-1.7M ammonium sulfate, 5-10% ethylene glycol, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
4.11 | 70.08 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 175.62 | ¦Á = 90 |
b = 175.62 | ¦Â = 90 |
c = 249.905 | ¦Ã = 90 |
Symmetry | |
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Space Group | P 43 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 | mirrors | 2006-08-15 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 17-ID | 1.0 | APS | 17-ID |
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 | 2.5 | 20 | 99.6 | 0.06 | 0.06 | 13 | 4 | 134571 | 134571 | 1 | 1 | 35.3 |
Highest Resolution Shell | |||||||||||||||||||
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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) | ||||||||||
2.5 | 2.59 | 98.9 | 0.256 | 0.256 | 4 | 3.6 |
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 (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 2H2Q | 2.5 | 20 | 127341 | 126968 | 6726 | 99.57 | 0.20167 | 0.19999 | 0.23378 | RANDOM | 41.712 |
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] | |
1.18 | 1.18 | -2.36 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 32.848 |
r_dihedral_angle_4_deg | 19.595 |
r_dihedral_angle_3_deg | 14.648 |
r_dihedral_angle_1_deg | 5.366 |
r_scangle_it | 1.657 |
r_angle_refined_deg | 1.183 |
r_scbond_it | 0.947 |
r_mcangle_it | 0.745 |
r_mcbond_it | 0.385 |
r_chiral_restr | 0.095 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 15905 |
Nucleic Acid Atoms | |
Solvent Atoms | 737 |
Heterogen Atoms | 408 |
Software
Software | |
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Software Name | Purpose |
HKL-2000 | data collection |
PHASER | phasing |
REFMAC | refinement |
d*TREK | data reduction |
d*TREK | data scaling |