5E5E
X-ray structure of the adduct formed in the reaction between RNase A and a neutral organometallic derivative [Pt(pbi)(Me)(DMSO)], pbi=2-(2'-pyridil)benzimidazole (compound 3)
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, HANGING DROP | 5.1 | 298 | RNase A crystals were grown by hanging drop vapor diffusion method using a reservoir solution containing 22-24 % (w/v) PEG4K, 10 mM sodium citrate pH 5.1-5.3. The crystals are monoclinic, space group C2, with two molecules in the asymmetric unit. The adduct was prepared by a three-days soaking in a solution that comprised the standard mother liquor used for the crystal growth to which a 2.5 mM solution of compound 3was added |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.18 | 43.48 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 100.398 | α = 90 |
| b = 32.768 | β = 89.82 |
| c = 72.54 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | C 1 2 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 | RIGAKU SATURN 944+ | 2015-03-18 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | ROTATING ANODE | RIGAKU MICROMAX-007 HF | 1.5418 | ||
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge 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 | 1.98 | 72.5 | 98.8 | 0.087 | 4.8 | 3.4 | 16494 | ||||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
| 1 | 1.98 | 2.01 | 0.408 | 3.2 | |||||||||||||||
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 | R-Free | R-Free Selection Details | Mean Isotropic B | |||||||
| X-RAY DIFFRACTION | THROUGHOUT | 1.98 | 72.5 | 15652 | 834 | 98.48 | 0.1949 | 0.19182 | 0.25392 | RANDOM | 34.33 | ||||||||
| 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] | |
| -0.12 | -0.41 | -0.53 | 0.64 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 36.129 |
| r_dihedral_angle_3_deg | 13.824 |
| r_dihedral_angle_4_deg | 12.997 |
| r_long_range_B_refined | 7.466 |
| r_long_range_B_other | 7.427 |
| r_dihedral_angle_1_deg | 6.575 |
| r_mcangle_it | 4.361 |
| r_mcangle_other | 4.36 |
| r_scangle_other | 4.241 |
| r_mcbond_it | 2.81 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1902 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 162 |
| Heterogen Atoms | 6 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| HKL-2000 | data reduction |
| HKL-2000 | data scaling |
| PHASER | phasing |
