Crystal structure of DNA-binding transcriptional dual regulator from Escherichia coli K-12
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 3.5 | 297 | 0.1M Citric acid pH 3.5, 25% PEG 3350, VAPOR DIFFUSION, SITTING DROP, temperature 297K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.52 | 51.21 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 41.972 | α = 90 |
| b = 81.856 | β = 90 |
| c = 165.065 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | C 2 2 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 | CCD | ADSC QUANTUM 315r | 2010-02-08 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | APS BEAMLINE 19-ID | 0.97929 | APS | 19-ID |
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 | 2.15 | 50 | 97.8 | 0.124 | 35.4 | 7.8 | 15966 | 15608 | -3 | 31.7 | |||||||||
| 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) | |||||||||||
| 2.15 | 2.19 | 97.1 | 0.403 | 6.96 | 8.2 | 769 | |||||||||||||
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 (All) | 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 | SAD | THROUGHOUT | 2.15 | 50 | 15505 | 15505 | 740 | 97.32 | 0.20846 | 0.20846 | 0.20651 | 0.2176 | 0.24681 | 0.2284 | RANDOM | 38.996 | |||
| 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] | |
| 0.86 | -2.96 | 2.09 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 27.506 |
| r_dihedral_angle_4_deg | 17.436 |
| r_dihedral_angle_3_deg | 16.394 |
| r_dihedral_angle_1_deg | 5.047 |
| r_scangle_it | 3.353 |
| r_scbond_it | 2.131 |
| r_angle_refined_deg | 1.267 |
| r_mcangle_it | 1.256 |
| r_mcbond_it | 0.659 |
| r_chiral_restr | 0.086 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1738 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 212 |
| Heterogen Atoms | |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| SBC-Collect | data collection |
| HKL-3000 | phasing |
| SHELXD | phasing |
| SHELXE | model building |
| MLPHARE | phasing |
| DM | model building |
| RESOLVE | model building |
| Coot | model building |
| ARP/wARP | model building |
| REFMAC | refinement |
| HKL-3000 | data reduction |
| HKL-3000 | data scaling |
| DM | phasing |
| RESOLVE | phasing |
