Crystal structure of phosphodiesterase 9 in complex with (R)-C33 (6-{[(1R)-1-(4-chlorophenyl)ethyl]amino}-1-cyclopentyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one)
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 7.5 | 277 | The PDE9A2 (8-10 mg/mL) in a buffer of 50 mM NaCl, 20 mM Tris-HCl, pH 7.5, 1 mM mercaptoethanol, and 1 mM EDTA was mixed with 2 mM C33 or (R)-C33 and crystallized against a well buffer of 1.8 - 2.0 M sodium formate. |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.04 | 59.5 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 105.436 | α = 90 |
| b = 105.436 | β = 90 |
| c = 270.056 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 41 21 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 315 | 2014-12-13 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | APS BEAMLINE 22-BM | 1.05 | APS | 22-BM |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | 3.1 | 98.22 | 84.9 | 7.6 | 6.6 | 24552 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Resolution (High) | Resolution (Low) | 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 | THROUGHOUT | 3.1 | 98.22 | 23302 | 1162 | 84.62 | 0.20719 | 0.20518 | 0.21 | 0.24742 | 0.25 | RANDOM | 61.719 | ||||||
| Temperature Factor Modeling | ||||||
|---|---|---|---|---|---|---|
| Anisotropic B[1][1] | Anisotropic B[2][2] | Anisotropic B[3][3] | ||||
| 0.04 | 0.04 | -0.09 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 37.609 |
| r_dihedral_angle_3_deg | 16.753 |
| r_dihedral_angle_4_deg | 16.75 |
| r_long_range_B_refined | 6.335 |
| r_long_range_B_other | 6.273 |
| r_dihedral_angle_1_deg | 5.44 |
| r_scangle_other | 4.17 |
| r_mcangle_other | 3.923 |
| r_mcangle_it | 3.922 |
| r_scbond_it | 2.511 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 5357 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 12 |
| Heterogen Atoms | 54 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| HKL-2000 | data reduction |
| HKL-2000 | data scaling |
| PHASER | phasing |
