Neutron structure of leucine and valine methyl protonated type III antifreeze
NEUTRON DIFFRACTION - X-RAY DIFFRACTION
Crystallization
| Crystalization Experiments | ||||
|---|---|---|---|---|
| ID | Method | pH | Temperature | Details |
| 1 | VAPOR DIFFUSION, SITTING DROP | 5.2 | 285 | 10mg/ml protein in 50 mM sodium acetate pD 5.2. Drops containing 20 ml protein solution and 30 ml precipitant buffer (2.1 M ammonium sulfate, 9% d8-glycerol) were equilibrated against 1 ml precipitant buffer in the reservoir, VAPOR DIFFUSION, SITTING DROP, temperature 285K |
| Crystal Properties | |
|---|---|
| Matthews coefficient | Solvent content |
| 2.16 | 43.08 |
Crystal Data
| Unit Cell | |
|---|---|
| Length ( Å ) | Angle ( ˚ ) |
| a = 32.73 | α = 90 |
| b = 39.12 | β = 90 |
| c = 46.54 | γ = 90 |
| Symmetry | |
|---|---|
| Space Group | P 21 21 21 |
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 | M | SINGLE WAVELENGTH | |||||||
| 2 | 1 | neutron | 298 | LADI-III | Image Plate | 2008-05-28 | L | LAUE | ||||||
| Radiation Source | |||||
|---|---|---|---|---|---|
| ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
| 1 | SYNCHROTRON | ESRF BEAMLINE ID23-1 | 0.6525 | ESRF | ID23-1 |
| 2 | NUCLEAR REACTOR | OTHER | 3.18-4.22 | ||
Data Collection
| Overall | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | R Split (All) | 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 | 1.05 | 50 | 99.7 | 0.048 | 32.5 | 6.1 | 28534 | ||||||||||||
| 2 | 1.8 | 46.52 | 89.3 | 0.136 | 14 | 11.1 | 5916 | 5194 | |||||||||||
| Highest Resolution Shell | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | R Merge I (Observed) | R-Sym I (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | R Split (All) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||
| 1 | 1.05 | 1.09 | 0.638 | 2.66 | |||||||||||||||
| 2 | 1.8 | 1.9 | 0.169 | 6.6 | 3.5 | ||||||||||||||
Refinement
| Statistics | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Diffraction ID | Structure Solution Method | Resolution (High) | Resolution (Low) | Cut-off Sigma (I) | Cut-off Sigma (F) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | 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 | 1.05 | 18.965 | 1.34 | 28511 | 1426 | 99.82 | 0.1712 | 0.1703 | 0.1706 | 0.1881 | 0.188 | 16.9609 | |||||||
| NEUTRON DIFFRACTION | 1.85 | 26.772 | 4897 | 246 | 89.94 | 0.1782 | 0.1757 | 0.2245 | |||||||||||
| 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 | 15.259 |
| f_angle_d | 1.302 |
| f_chiral_restr | 0.08 |
| f_bond_d | 0.013 |
| f_plane_restr | 0.006 |
| Non-Hydrogen Atoms Used in Refinement | |
|---|---|
| Non-Hydrogen Atoms | Number |
| Protein Atoms | 479 |
| Nucleic Acid Atoms | |
| Solvent Atoms | 42 |
| Heterogen Atoms | |
Software
| Software | |
|---|---|
| Software Name | Purpose |
| QLD | data collection |
| PHENIX | model building |
| PHENIX | refinement |
| LAUEGEN | data reduction |
| LSCALE | data scaling |
| SCALA | data scaling |
| PHENIX | phasing |














