Apo state of the CdmB methyltransferase involved in the anaerobic dehalogenation of haloalkanes
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 6.2 | 293.15 | The protein was crystallized at 17.6 mg/ml in 25 mM Tris-HCl pH 7.6, 10% v/v glycerol, 0.1 mM ZnCl2, and 2 mM dithiothreitol. Initial screening was performed on a 96-Well MRC 2-Drop polystyrene Crystallization Plate (SWISSCI). From the initial hit, crystallization was further refined and performed aerobically at 20 degrees Celsius using the sitting drop method on CombiClover Jr crystallization plates (Molecular Dimensions). The reservoir chamber was filled with 100 ul of the crystallization solution containing: 50 % (v/v) Polyethylene glycol 200, 100 mM Sodium Potassium phosphate pH 6.2, and 200 mM Sodium chloride. The crystallization drop was formed by spotting 0.9 ul of purified protein with 0.9 ul of precipitant. |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.39 | 48.46 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 69.511 | α = 90 |
| b = 85.792 | β = 99.05 |
| c = 155.797 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | C 1 2 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 | PIXEL | DECTRIS PILATUS 6M | 2024-06-19 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | ESRF BEAMLINE BM07 | 0.97951 | ESRF | BM07 |
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 | 1.57 | 153.86 | 90.6 | 0.062 | 0.066 | 0.025 | 0.999 | 15.7 | 7 | 82269 | |||||||||
| 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 | 1.57 | 1.72 | 57.2 | 1.23 | 1.329 | 0.498 | 0.53 | 1.5 | 6.8 | ||||||||||
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 | FREE R-VALUE | 1.57 | 27.88 | 1.33 | 82182 | 4225 | 65.36 | 0.1744 | 0.1733 | 0.1797 | 0.1953 | 0.1977 | 37.47 | |||||
| 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 | 15.774 |
| f_angle_d | 1 |
| f_chiral_restr | 0.059 |
| f_bond_d | 0.008 |
| f_plane_restr | 0.008 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 6638 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 502 |
| Heterogen Atoms | 246 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| PHENIX | refinement |
| PDB_EXTRACT | data extraction |
| autoPROC | data reduction |
| autoPROC | data scaling |
| PHASER | phasing |














