Crystal Structure of Ketosteroid Isomerase D38NP39GD99N from Pseudomonas Testosteroni (tKSI) with 4-Androstene-3,17-dione Bound
X-RAY DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 8CHO | PDB ENTRY 8CHO |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 7.2 | 298 | 2 M ammonium sulfate, 20 mM potassium phosphate, 1 mM EDTA, 2mM DTT, pH 7.2, vapor diffusion, sitting drop, temperature 298K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.79 | 55.85 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 60.168 | α = 90 |
| b = 60.168 | β = 90 |
| c = 142.585 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | P 65 2 2 |
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 | ADSC QUANTUM 315r | 2010-05-14 | SINGLE WAVELENGTH | |||||||
| 2 | 1 | x-ray | 100 | CCD | MARMOSAIC 325 mm CCD | 2010-01-05 | SINGLE WAVELENGTH | |||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | SSRL BEAMLINE BL9-1 | 0.97946 | SSRL | BL9-1 |
| 2 | SYNCHROTRON | SSRL BEAMLINE BL9-2 | 0.97946 | SSRL | BL9-2 |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | 1.73 | 52.107 | 99.9 | 0.058 | 30.9 | 19.2 | 16748 | 16748 | |||||||||||
| 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) | ||||||||||
| 1,2 | 1.73 | 1.82 | 99.5 | 0.023 | 2.265 | 1.4 | 15.7 | ||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 (Depositor) | R-Work (DCC) | R-Free (Depositor) | R-Free (DCC) | R-Free Selection Details | Mean Isotropic B | |||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 8CHO | 1.73 | 52.107 | 16407 | 15577 | 830 | 98.15 | 0.23411 | 0.23252 | 0.2458 | 0.26483 | 0.2866 | RANDOM | 43.128 | |||
| 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] | |
| 1.47 | 0.73 | 1.47 | -2.2 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 38.438 |
| r_dihedral_angle_4_deg | 19.089 |
| r_dihedral_angle_3_deg | 18.526 |
| r_dihedral_angle_1_deg | 8.607 |
| r_scangle_it | 5.308 |
| r_scbond_it | 3.423 |
| r_angle_refined_deg | 2.258 |
| r_mcangle_it | 2.219 |
| r_mcbond_it | 1.325 |
| r_chiral_restr | 0.144 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 934 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 69 |
| Heterogen Atoms | 36 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| SCALA | data scaling |
| MOLREP | phasing |
| REFMAC | refinement |
| PDB_EXTRACT | data extraction |
| Blu-Ice | data collection |
| Web-Ice | data collection |
| XDS | data reduction |














