Atomic resolution (0.94 A) structure of purified thaumatin I grown in sodium L-tartrate at 22C
X-RAY DIFFRACTION
Starting Model(s)
| Initial Refinement Model(s) | |||
|---|---|---|---|
| Type | Source | Accession Code | Details |
| experimental model | PDB | 1KWN | PDB ENTRY 1KWN |
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | 7.1 | 295 | PROTEIN AT 45 MG/ML IN 10MM SODIUM PHOSPHATE WITH 0.25M SODIUM L-TARTRATE (PH=7.1) AND 10% (V/V) GLYCEROL; CRYSTALS GROWN AT 22C | |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.1 | 40.6 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 57.88 | α = 90 |
| b = 57.88 | β = 90 |
| c = 149.95 | 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 | ADSC CCD | TOROIDAL FOCUSING MIRROR | 2007-08-22 | M | SINGLE WAVELENGTH | |||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | NSLS BEAMLINE X6A | NSLS | X6A | |
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 | 0.94 | 20 | 99 | 0.04 | 31.9 | 6.1 | 163884 | 2 | |||||||||||
| 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 | 0.94 | 0.96 | 100 | 0.59 | 3.1 | 6.7 | |||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | 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 | MOLECULAR REPLACEMENT | THROUGHOUT | PDB ENTRY 1KWN | 0.94 | 20 | 155413 | 8230 | 98.9 | 0.125 | 0.124 | 0.13 | 0.134 | 0.14 | RANDOM | 11.59 | ||||
| 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] | |
| 0.17 | 0.17 | -0.34 | ||||
| RMS Deviations | |
|---|---|
| Key | Refinement Restraint Deviation |
| r_dihedral_angle_2_deg | 35.739 |
| r_dihedral_angle_4_deg | 11.785 |
| r_dihedral_angle_3_deg | 10.564 |
| r_dihedral_angle_1_deg | 6.665 |
| r_scangle_it | 3.067 |
| r_scbond_it | 2.343 |
| r_mcangle_it | 2.007 |
| r_angle_refined_deg | 1.552 |
| r_mcbond_it | 1.384 |
| r_nbtor_refined | 0.313 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 1545 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 414 |
| Heterogen Atoms | 38 |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| REFMAC | refinement |
| DENZO | data reduction |
| SCALEPACK | data scaling |
| MOLREP | phasing |
