Crystal structure of d(CGTTAACG)2 with a five-carbon linker containing quinoxaline-acridine asymmetric intercalator compound
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 6.5 | 293 | 0.6mM oligonucleotides, 0.6mM QA5, 50mM 2-(N-morpholino)ethanesulfonic acid hydrate (pH 6.5), 200mM potassium chloride, 5mM hexammine cobalt(III) chloride, 15% (v/v) 2-methyl-2,4-pentanediol |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.06 | 40.16 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 23.835 | α = 90 |
| b = 34.948 | β = 90 |
| c = 47.901 | 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 | PIXEL | DECTRIS EIGER X 16M | 2022-09-28 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | NSRRC BEAMLINE TPS 07A | 0.97626 | NSRRC | TPS 07A |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | 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 | 1.27 | 30 | 97.5 | 0.059 | 0.066 | 0.028 | 1 | 13.5 | 5.9 | 10857 | |||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||
| 1 | 1.27 | 1.32 | 96.8 | 0.203 | 0.221 | 0.086 | 0.973 | 6.4 | |||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation 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) | R-Free (DCC) | Mean Isotropic B | |||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | NONE | 1.27 | 23.95 | 1.38 | 10803 | 1081 | 97.57 | 0.2141 | 0.2123 | 0.2129 | 0.2297 | 0.2334 | ||||||
| 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 |
| f_dihedral_angle_d | 34.419 |
| f_angle_d | 1.43 |
| f_chiral_restr | 0.059 |
| f_plane_restr | 0.014 |
| f_bond_d | 0.011 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | |
| Nucleic Acid Atoms | 328 |
| Solvent Atoms | 80 |
| Heterogen Atoms | 43 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PHENIX | refinement |
| HKL-2000 | data scaling |
| HKL-2000 | data reduction |
| PHENIX | phasing |














