X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION | 4.8 | PRIOR TO CRYSTALLIZATION THE PROTEIN WAS PREINCUBATED WITH 3.8 MM CACL2 TO REACH A FINAL PROTEIN CONCENTRATION OF 10 MG/ML AND A PRTEIN:METAL ION RATIO 1:10. CRYSTALLIZATION EXPERIMENTS WERE CARRIED OUT AT ROOM TEMPERATURE. CRYSTALS WERE GROWN USING VAPOUR DIFFUSION TECHNIQUES FROM DROPS CONTAINING SOS3-CA, RESERVOIR SOLUTIONS (24%(W/V) METHYL-PENTANEDIOL, 18%(W/V) POLYETHYLENE GLYCOL 4000 AND 0.1 NA-CITRATE PH 4.8) AND NAI 1M IN A RATIO 2:1:0.75 | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.45 | 64.3 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 91.6 | α = 90 |
| b = 91.6 | β = 90 |
| c = 85.4 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | I 41 |
Diffraction
| Diffraction Experiment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Crystal ID | Scattering Type | Data Collection Temperature | Detector | Detector Type | Details | Collection Date | Monochromator | Protocol | |||||
| 1 | 1 | x-ray | 100 | 2003-10-15 | M | SINGLE WAVELENGTH | ||||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | ESRF BEAMLINE BM16 | ESRF | BM16 | |
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 | 2.7 | 62 | 100 | 0.057 | 4.4 | 3.7 | 9757 | 1.4 | |||||||||||
| 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) | |||||||||||
| 1 | 2.7 | 2.85 | 99.6 | 0.54 | 1.4 | 3.4 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | 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 | SAD | THROUGHOUT | 2.7 | 20 | 9213 | 507 | 100 | 0.237 | 0.235 | 0.23 | 0.264 | 0.25 | RANDOM | 74.24 | |||||
| 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] | |
| -0.43 | -0.43 | 0.86 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_1_deg | 7.353 |
| r_scangle_it | 4.08 |
| r_scbond_it | 2.264 |
| r_angle_refined_deg | 1.735 |
| r_mcangle_it | 1.664 |
| r_mcbond_it | 0.844 |
| r_symmetry_vdw_refined | 0.342 |
| r_nbd_refined | 0.261 |
| r_xyhbond_nbd_refined | 0.18 |
| r_chiral_restr | 0.129 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1547 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 40 |
| Heterogen Atoms | 27 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| MOSFLM | data reduction |
| SCALA | data scaling |
| SHARP | phasing |
