4EPR
Discovery of Small Molecules that Bind to K-Ras and Inhibit Sos-Mediated Activation.
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 7.5 | 291 | 30% PEG4000, 0.1 M sodium phosphate, 0.2 M Li2SO4, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.71 | 54.54 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 94.357 | α = 90 |
| b = 94.357 | β = 90 |
| c = 122.356 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | H 3 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 | Bruker Platinum 135 | 2010-09-15 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | ROTATING ANODE | BRUKER AXS MICROSTAR | |||
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 | 2 | 50 | 99.9 | 14406 | -3 | ||||||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||||
| 1 | 2 | 2.03 | 99 | ||||||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | 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 | 2 | 50 | 14424 | 13572 | 720 | 99.4 | 0.203 | 0.2 | 0.253 | RANDOM | 26.67 | ||||||
| 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] | |
| -0.84 | -0.42 | -0.84 | 1.27 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 39.378 |
| r_dihedral_angle_4_deg | 19.885 |
| r_dihedral_angle_3_deg | 14.29 |
| r_dihedral_angle_1_deg | 6.541 |
| r_scangle_it | 5.663 |
| r_scbond_it | 3.546 |
| r_mcangle_it | 2.341 |
| r_angle_refined_deg | 2.048 |
| r_mcbond_it | 1.383 |
| r_chiral_restr | 0.149 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1327 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 132 |
| Heterogen Atoms | 29 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PROTEUM PLUS | data collection |
| MOLREP | phasing |
| REFMAC | refinement |
| HKL-2000 | data reduction |
| HKL-2000 | data scaling |
