THE CRYSTAL STRUCTURE OF N4-METHYLCYTOSINE.GUANOSIN BASE-PAIRS IN THE SYNTHETIC HEXANUCLEOTIDE D(CGCGM(4)CG)
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION | 6.5 | 277 | pH 6.50, VAPOR DIFFUSION, temperature 277.00K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 1.7 | 27.51 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 17.98 | α = 90 |
| b = 30.77 | β = 90 |
| c = 44.76 | 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 | 295 | DIFFRACTOMETER | RIGAKU AFC-5 | |||||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | ROTATING ANODE | RIGAKU RU200 | |||
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 | 1.5 | 2994 | |||||||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Cut-off Sigma (F) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work (Depositor) | R-Work (DCC) | R-Free (Depositor) | Mean Isotropic B | |||||||
| X-RAY DIFFRACTION | 1.8 | 8 | 1 | 1495 | 0.189 | 0.18 | |||||||||||||
| 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] | |
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| n_phos_bond_angle_d | 0.029 |
| n_phos_bond_d | 0.028 |
| n_sugar_bond_angle_d | 0.025 |
| n_sugar_bond_d | 0.019 |
| n_bond_d | |
| n_angle_d | |
| n_planar_d | |
| n_hb_or_metal_coord | |
| n_sugar_bond_it | |
| n_sugar_angle_it | |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | |
| Nucleic Acid Atoms | 240 |
| Solvent Atoms | 49 |
| Heterogen Atoms | 2 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| NUCLSQ | refinement |
| X-PLOR | refinement |
