Crystal structure of a double-ENE RNA stability element in complex with a 28-mer poly(A) RNA
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 7 | 298 | 50 mM sodium cacodylate, pH 7.0, 9 mM MgCl2, 1.8 mM cobalt (III) hexamine chloride, 0.9 mM spermidine, 2.5 mM spermine and 5% PEG 400 |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.51 | 64.97 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 93.973 | α = 90 |
| b = 93.973 | β = 90 |
| c = 202.171 | γ = 120 |
| Symmetry | |
|---|---|
| Space Group | P 64 2 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 | PIXEL | DECTRIS PILATUS3 6M | 2019-11-16 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | APS BEAMLINE 24-ID-C | 0.9272 | APS | 24-ID-C |
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 | 2.89 | 50 | 95.1 | 0.147 | 0.151 | 0.037 | 0.994 | 17.05 | 16.4 | 11859 | |||||||||
| 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 | 2.89 | 3 | 3.293 | 3.45 | 0.979 | 0.199 | 0.66 | 10.2 | |||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | 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 | MOLECULAR REPLACEMENT | THROUGHOUT | dENE | 2.89 | 47.03 | 11269 | 581 | 95.1 | 0.1862 | 0.1842 | 0.18 | 0.2254 | 0.23 | RANDOM | 108.846 | ||||
| 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] | |
| 0.7 | 0.35 | 0.7 | -2.28 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_angle_refined_deg | 1.951 |
| r_angle_other_deg | 1.675 |
| r_chiral_restr | 0.138 |
| r_gen_planes_refined | 0.01 |
| r_bond_refined_d | 0.008 |
| r_bond_other_d | 0.003 |
| r_gen_planes_other | 0.001 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | |
| Nucleic Acid Atoms | 2324 |
| Solvent Atoms | |
| Heterogen Atoms | 121 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| HKL-2000 | data reduction |
| SCALEPACK | data scaling |
| PHASER | phasing |
| REFMAC | refinement |
| PDB_EXTRACT | data extraction |














