The Molecular Basis of Vitamin E Retention: Structure of Human Alpha-Tocopherol Transfer Protein
X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 5.6 | 12% PEG 6000, 0.1 M NA-CITRATE PH 5.6, 0.1 M LISO4 | ||
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 3.06 | 59.75 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 77.81 | α = 90 |
| b = 77.81 | β = 90 |
| c = 128.36 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 41 21 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 | CCD | MARRESEARCH | 2002-09-15 | M | SINGLE WAVELENGTH | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | SLS BEAMLINE X06SA | SLS | X06SA | |
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 | 1.95 | 20 | 99.7 | 0.062 | 22.8 | 10.8 | 29375 | ||||||||||||
| 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 | 1.95 | 1.98 | 97.7 | 0.559 | 3.5 | 6.9 | |||||||||||||
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-Free (Depositor) | R-Free Selection Details | Mean Isotropic B | |||||||
| X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 1.95 | 19.54 | 27963 | 1472 | 100 | 0.192 | 0.19 | 0.227 | RANDOM | 18.99 | |||||||
| 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] | |
| -0.29 | -0.29 | 0.59 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_1_deg | 6.858 |
| r_scangle_it | 4.711 |
| r_scbond_it | 3.347 |
| r_mcangle_it | 2.882 |
| r_mcbond_it | 1.927 |
| r_angle_refined_deg | 1.261 |
| r_nbd_refined | 0.258 |
| r_symmetry_vdw_refined | 0.174 |
| r_xyhbond_nbd_refined | 0.143 |
| r_symmetry_hbond_refined | 0.129 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 2047 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 125 |
| Heterogen Atoms | 41 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| XDS | data reduction |
| XDS | data scaling |
| CNS | phasing |
