7NXG
Wax synthase 1 from Acinetobacter baylyi (AbWSD1) co-crystallized with myristic acid
X-RAY DIFFRACTION
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 277.15 | Native crystal: Crystals were grown by in situ proteolysis with trypsin. Trypsin was added in a 1:200 (w/w) ration to 20 mg/mL native His6-TF-AbWSD1 before set up of the crystallization screens. 100 nL precipitant (17.3 % ethanol, 0.2 M MgCl2, 0.1 M TRIS pH 8.0) were added to 200 nL protein using 96-well plates with a Cartesian pipetting robot (Zinsser Analytic). Plates were stored at 277.15 K. Crystals were transferred into a cryoprotectant consisting of mother liquor supplemented with 30 % ethylene glycol and then flash cooled in liquid nitrogen. | |
2 | VAPOR DIFFUSION, SITTING DROP | 277.15 | SeMet crystal: Trypsin was added in a 1:1000 ratio (w/w) to 15 mg/mL selenomethionine-labelled His6-TF-AbWSD1. Sitting drops consisting of 100 nL protein and 100 nL precipitant (14.1 % ethanol, 0.1 M MgCl2, 0.1 M HEPES pH 7.5) were pipetted with a Gryphon robot (Art Robbins Instruments). The 96-well plates were stored at 277.15 K. For cryoprotection of the crystals, 2-methyl-2,4-pentanediol was added to the crystallization drop by transferring it five times with a 0.4 mm LithoLoop (Molecular Dimensions) at 277.15 K. Crystals were then harvested from the drop and flash-cooled in liquid nitrogen. |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 118.32 | α = 90 |
b = 118.32 | β = 90 |
c = 142.56 | γ = 90 |
Symmetry | |
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Space Group | I 4 2 2 |
Diffraction
Diffraction Experiment | ||||||||||||||
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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 | 2014-05-05 | M | SINGLE WAVELENGTH | ||||||
2 | 2 | x-ray | 100 | PIXEL | DECTRIS EIGER X 16M | 2016-05-05 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SLS BEAMLINE X10SA | 0.9788 | SLS | X10SA |
2 | SYNCHROTRON | SLS BEAMLINE X06SA | 0.97644 | SLS | X06SA |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Rrim 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 | 1.95 | 44.1 | 99.7 | 0.087 | 0.091 | 1 | 19.91 | 13.172 | 36998 | 39.11 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||
1 | 1.95 | 2.05 | 99.4 | 2.119 | 2.206 | 0.659 | 1.46 | 12.699 |
Refinement
Statistics | |||||||||||||||||||
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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 | R-Free | Mean Isotropic B | |||||||
X-RAY DIFFRACTION | SAD | THROUGHOUT | 1.95 | 44.1 | 1.35 | 36985 | 1850 | 99.66 | 0.1896 | 0.1885 | 0.2093 | 50.5539 |
Temperature Factor Modeling | ||||||
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Anisotropic B[1][1] | Anisotropic B[1][2] | Anisotropic B[1][3] | Anisotropic B[2][2] | Anisotropic B[2][3] | Anisotropic B[3][3] | |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3050 |
Nucleic Acid Atoms | |
Solvent Atoms | 210 |
Heterogen Atoms | 43 |
Software
Software | |
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Software Name | Purpose |
PHENIX | refinement |
XDS | data reduction |
XSCALE | data scaling |
PDB_EXTRACT | data extraction |
SHELXCD | phasing |