Structure of P-glycoprotein Reveals a Molecular Basis for Poly-Specific Drug Binding
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 7.5 | 278 | 17% PEG 350mme, 0.05M tris, 0.04% sodium cholate, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 278K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.76 | 67.27 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 97.542 | α = 90 |
| b = 115.426 | β = 90 |
| c = 378.858 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 21 21 21 |
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 | MARRESEARCH | 2007-12-16 | M | MAD | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | APS BEAMLINE 23-ID-B | 1.00695, 1.00923 | APS | 23-ID-B |
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 | 3.8 | 50 | 96.1 | 0.082 | 7.9 | 42800 | 41131 | 48 | |||||||||||
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 | MAD | THROUGHOUT | 3.8 | 19.98 | 41131 | 4203 | 96.1 | 0.306 | 0.306 | 0.31 | 0.347 | 0.35 | RANDOM | 136.2 | |||||
| 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] | |
| 0.56 | 26.39 | -26.95 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| c_dihedral_angle_d | 20.7 |
| c_angle_deg | 1.9 |
| c_improper_angle_d | 1.15 |
| c_bond_d | 0.01 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 18340 |
| Nucleic Acid Atoms | |
| Solvent Atoms | |
| Heterogen Atoms | 12 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| HKL-2000 | data collection |
| SOLVE | phasing |
| CNS | refinement |
| HKL-2000 | data reduction |
| HKL-2000 | data scaling |
