1G21
MGATP-BOUND AND NUCLEOTIDE-FREE STRUCTURES OF A NITROGENASE PROTEIN COMPLEX BETWEEN LEU127DEL-FE PROTEIN AND THE MOFE PROTEIN
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1G20 | MoFe protein of nucleotide-free structure (PDB ID 1G20) |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | microcapillary batch diffusion | 8.5 | 298 | PEG 4000, sodium acetate, Tris-HCl. Ph 8.8, pH 8.5, microcapillary batch diffusion, temperature 298K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.5 | 50 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 110.5 | α = 90 |
b = 121.5 | β = 90 |
c = 264.9 | γ = 90 |
Symmetry | |
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Space Group | P 21 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 | IMAGE PLATE | MARRESEARCH | 1998-04-20 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SSRL BEAMLINE BL7-1 | SSRL | BL7-1 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | 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 | 3 | 20 | 71.6 | 0.132 | 12 | 7.3 | 52828 | 51434 | 1 | 0.5 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
3 | 3.11 | 28.7 | 0.282 | 3 |
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 (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (All) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||
X-RAY DIFFRACTION | THROUGHOUT | MoFe protein of nucleotide-free structure (PDB ID 1G20) | 3 | 20 | 1 | 52828 | 51434 | 2668 | 71.6 | 0.2466 | 0.2405 | 0.238 | 0.285 | thin shells |
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 |
c_angle_deg | 1.68 |
c_bond_d | 0.01 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 23999 |
Nucleic Acid Atoms | |
Solvent Atoms | |
Heterogen Atoms | 238 |
Software
Software | |
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Software Name | Purpose |
AMoRE | phasing |
CNS | refinement |
DENZO | data reduction |
SCALEPACK | data scaling |