8P8G
Nitrogenase MoFe protein from A. vinelandii beta double mutant D353G/D357G
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 3U7Q |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 5.6 | 293.15 | The beta-D353G/D357G MoFe-protein was crystallized anaerobically at 17.5 mg/mL under 100% N2 atmosphere. The protein was spotted as a sitting drop to 96-Well MRC 2-Drop polystyrene Crystallization Plates (SWISSCI) containing 90 uL of crystallization solution in the reservoir. Each drop contained 0.5 uL of protein sample and 0.5 uL of crystallization solution. Crystals were obtained in the crystallization solution containing 10 % w/v Polyethylene glycol 10,000; 2 % v/v 1,4-Dioxane; 100 mM tri-Sodium citrate; pH 5.6, and 1 mM polyoxotungstate [TeW6O24]6- (TEW). Sealed plates were stored inside a Coy anaerobic chamber filled with an atmosphere of N2:H2 97:3 at 20 C. Crystals were soaked in the crystallization solution supplemented with 30% v/v ethylene glycol for a few seconds before freezing in liquid nitrogen. |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.74 | 55.06 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 167.486 | α = 90 |
b = 74.469 | β = 103.25 |
c = 208.467 | γ = 90 |
Symmetry | |
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Space Group | C 1 2 1 |
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 2M-F | 2021-10-16 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SLS BEAMLINE X06DA | 1.00002 | SLS | X06DA |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | Rrim I (All) | Rpim 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 | 1.55 | 101.46 | 94 | 0.177 | 0.189 | 0.066 | 0.995 | 8.1 | 8.1 | 176043 | 14 |
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) | Rpim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||
1 | 1.55 | 1.76 | 80.5 | 1.89 | 2.001 | 0.652 | 0.566 | 1.8 | 9.3 |
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 | MOLECULAR REPLACEMENT | FREE R-VALUE | 1.55 | 48.32 | 1.33 | 175938 | 8763 | 48.69 | 0.1566 | 0.155 | 0.1872 | 18.62 |
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] | |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
f_dihedral_angle_d | 15.629 |
f_angle_d | 1.035 |
f_chiral_restr | 0.061 |
f_bond_d | 0.012 |
f_plane_restr | 0.01 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 15912 |
Nucleic Acid Atoms | |
Solvent Atoms | 2176 |
Heterogen Atoms | 285 |
Software
Software | |
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Software Name | Purpose |
PHENIX | refinement |
autoPROC | data reduction |
autoPROC | data scaling |
PHASER | phasing |