7TPZ
Selenium-free nitrogenase Fe protein (Av2) from A. vinelandii (nucleotide control)
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 6N4L | PDB entry 6N4L |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 7.5 | 298 | 36-41% PEG400, 0.1-0.3 M sodium chloride, 0.1 M HEPES, pH 7.5, 2.5 mM dithionite, 0.17 mM Cymal-7 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
1.99 | 38.05 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 45.522 | α = 90 |
b = 73.711 | β = 90 |
c = 74.665 | γ = 90 |
Symmetry | |
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Space Group | P 2 21 21 |
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 | 2020-12-01 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SSRL BEAMLINE BL12-2 | 0.97869, 0.98062 | SSRL | BL12-2 |
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 | 1.71 | 45.49 | 99.8 | 0.076 | 0.082 | 0.031 | 1 | 19.7 | 13 | 27863 | 20.82 |
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 | 1.71 | 1.74 | 98.5 | 1.273 | 1.379 | 0.526 | 0.818 | 11.5 |
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 | THROUGHOUT | PDB entry 6N4L | 1.71 | 37.33 | 1.34 | 27793 | 2593 | 99.79 | 0.1728 | 0.1712 | 0.2053 | 28.0726 |
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] | |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 2057 |
Nucleic Acid Atoms | |
Solvent Atoms | 139 |
Heterogen Atoms | 32 |
Software
Software | |
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Software Name | Purpose |
Aimless | data scaling |
MOLREP | phasing |
PHENIX | refinement |
PDB_EXTRACT | data extraction |
XDS | data reduction |