Crystal structure of a LacI family transcriptional regulator from Mycobacterium smegmatis
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION | 4.6 | 294 | 100mM sodium acetate pH 4.6, 30% PEG 4000, 200mM ammonium acetate, vapor diffusion, temperature 294K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 1.92 | 35.79 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 64.599 | α = 90 |
| b = 65.468 | β = 90.72 |
| c = 116.034 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 1 21 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 | MARMOSAIC 225 mm CCD | 2009-10-24 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | APS BEAMLINE 31-ID | 0.97958 | APS | 31-ID |
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym 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 | 2.2 | 33.367 | 99.2 | 0.083 | 0.083 | 14.2 | 7.5 | 49476 | 49080 | 36.5 | |||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||||
| 2.2 | 2.32 | 99.2 | 0.371 | 0.371 | 5 | 7.5 | 7127 | ||||||||||||
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 (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 | 2.2 | 20 | 49410 | 49000 | 2456 | 99.17 | 0.197 | 0.194 | 0.21 | 0.247 | 0.27 | RANDOM | 39.486 | ||||
| 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] | |
| -0.33 | 0.03 | 0.93 | -0.6 | |||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 36.017 |
| r_dihedral_angle_4_deg | 18.44 |
| r_dihedral_angle_3_deg | 14.945 |
| r_dihedral_angle_1_deg | 6.215 |
| r_scangle_it | 3.687 |
| r_scbond_it | 2.385 |
| r_angle_refined_deg | 1.477 |
| r_mcangle_it | 1.312 |
| r_angle_other_deg | 0.954 |
| r_mcbond_it | 0.716 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 8104 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 127 |
| Heterogen Atoms | 20 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| SCALA | data scaling |
| REFMAC | refinement |
| PDB_EXTRACT | data extraction |
| MAR345 | data collection |
| MOSFLM | data reduction |
| SHELXCD | phasing |
| SHELXE | model building |
| MLPHARE | phasing |
| DM | phasing |














