4ERM
Crystal structure of the dATP inhibited E. coli class Ia ribonucleotide reductase complex at 4 Angstroms resolution
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 3UUS |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, HANGING DROP | 7.5 | 298 | Precipitant conditions: 10% PEG 3350, 0.1 M MOPS pH 7.5, 0.2 M Magnesium Acetate, 0.025 M Magnesium Chloride, 0.006 M n-Nonyl-beta-D-maltopyranoside, and 5% glycerol. Mixed 1:1 with protein., VAPOR DIFFUSION, HANGING DROP, temperature 298K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
3.08 | 60.07 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 280.471 | α = 90 |
b = 155.744 | β = 119.07 |
c = 166.919 | 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 | CCD | ADSC QUANTUM 315 | 2011-02-25 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | APS BEAMLINE 24-ID-C | 0.9794 | APS | 24-ID-C |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Sym 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 | 3.95 | 30 | 96.6 | 0.161 | 5 | 2.9 | 55058 | 53173 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R-Sym I (Observed) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | |||||||||||
1 | 3.95 | 4.09 | 96.5 | 0.457 | 2.3 | 2.9 | 5306 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (All) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | |||||||
X-RAY DIFFRACTION | FOURIER SYNTHESIS | 3UUS | 3.95 | 30 | 55058 | 52934 | 2513 | 96.1 | 0.259 | 0.284 | Selected the same set used in starting model plus another set chosen from the new reflections to give a total of 5% free reflections. |
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 |
c_mcangle_it | 3.677 |
c_mcbond_it | 2.372 |
c_angle_d | 0.74 |
c_bond_d | 0.02 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 34977 |
Nucleic Acid Atoms | |
Solvent Atoms | 8 |
Heterogen Atoms | 360 |
Software
Software | |
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Software Name | Purpose |
HKL-2000 | data collection |
CNS | refinement |
HKL-2000 | data reduction |
HKL-2000 | data scaling |
CNS | phasing |