6UG0
N2-bound Nitrogenase MoFe-protein from Azotobacter vinelandii
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 3U7Q | PDB entry 3U7Q |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 5 | 293 | 14-19 % w/v PEG smear high, 0.16M ammonium acetate, 0.1M sodium citrate (pH 5.0), 25.6 % v/v glycerol, 5mM Eu(II)-EGTA |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.92 | 57.85 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 84.362 | α = 90 |
b = 156.967 | β = 90 |
c = 202.343 | γ = 90 |
Symmetry | |
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Space Group | P 21 21 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 | Flat Si Rh coated M0, Kirkpatrick-Baez flat bent Si M1 & M2 | 2019-06-07 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SSRL BEAMLINE BL12-2 | 1.0000 | SSRL | BL12-2 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (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 | 1.83 | 50 | 95.2 | 0.215 | 0.061 | 0.994 | 11.5 | 11.5 | 237283 | 31.55 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | Rrim I (All) | Rpim I (All) | CC (Half) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||
1 | 1.83 | 1.86 | 94.8 | 3.163 | 1.035 | 0.352 | 9 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | 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 | PDB entry 3U7Q | 1.83 | 39.19 | 1.33 | 222639 | 1969 | 93.84 | 0.218 | 0.2176 | 0.2587 | 49.87 |
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 | |
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Key | Refinement Restraint Deviation |
f_dihedral_angle_d | 3.9127 |
f_angle_d | 0.9927 |
f_chiral_restr | 0.054 |
f_bond_d | 0.0089 |
f_plane_restr | 0.0066 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 15576 |
Nucleic Acid Atoms | |
Solvent Atoms | 777 |
Heterogen Atoms | 159 |
Software
Software | |
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Software Name | Purpose |
Blu-Ice | data collection |
HKL-3000 | data reduction |
HKL-3000 | data scaling |
PHASER | phasing |
PHENIX | refinement |