3JQA
Crystal structure of pteridine reductase 1 (PTR1) from Trypanosoma brucei in ternary complex with cofactor (NADP+) and inhibitor 2-amino-1,9-dihydro-6H-purine-6-thione (DX4)
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 2C7V | PDB entry 2C7V |
Crystallization
Crystalization Experiments | ||||
---|---|---|---|---|
ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION | 293 | 2-3M Sodium acetate, 10-100mM Sodium citrate, pH 4.0-6.0, VAPOR DIFFUSION, temperature 293K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.07 | 40.58 |
Crystal Data
Unit Cell | |
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Length ( ? ) | Angle ( ? ) |
a = 74.997 | ¦Á = 90 |
b = 90.834 | ¦Â = 115.5 |
c = 82.64 | ¦Ã = 90 |
Symmetry | |
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Space Group | P 1 21 1 |
Diffraction
Diffraction Experiment | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
1 | 1 | x-ray | 100 | CCD | MARMOSAIC 325 mm CCD | Pt coated mirrors in a Kirkpatrick-Baez (KB) geometry | 2006-05-21 | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | ESRF BEAMLINE ID23-2 | 0.87300 | ESRF | ID23-2 |
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 | 1.9 | 57.64 | 99.9 | 0.057 | 0.057 | 9.9 | 3 | 78741 |
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) | ||||||||||
1 | 1.9 | 2 | 99.9 | 0.32 | 0.32 | 2.1 | 3.3 | 11433 |
Refinement
Statistics | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | PDB entry 2C7V | 1.9 | 57.64 | 78702 | 3960 | 99.87 | 0.149 | 0.147 | 0.189 | RANDOM | 23.802 |
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] | |
-1.22 | -0.54 | 1.63 | -0.88 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 34.73 |
r_dihedral_angle_4_deg | 16.781 |
r_dihedral_angle_3_deg | 13.448 |
r_dihedral_angle_1_deg | 5.566 |
r_scangle_it | 5.252 |
r_scbond_it | 4.05 |
r_mcangle_it | 2.828 |
r_mcbond_it | 2.418 |
r_angle_refined_deg | 1.342 |
r_angle_other_deg | 0.937 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 7414 |
Nucleic Acid Atoms | |
Solvent Atoms | 638 |
Heterogen Atoms | 236 |
Software
Software | |
---|---|
Software Name | Purpose |
MOSFLM | data reduction |
SCALA | data scaling |
REFMAC | refinement |
PDB_EXTRACT | data extraction |
MAR345 | data collection |
MOLREP | phasing |