2P02
Crystal structure of the alpha subunit of human S-adenosylmethionine synthetase 2
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 1QM4 | PDB entry 1QM4 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 8 | 298 | 0.2M Lithium chloride, 0.1M Tris-HCl, 20% PEG 6000, 10.0% Ethylene glycol, pH 8.0, VAPOR DIFFUSION, SITTING DROP, temperature 298K |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.15 | 42.85 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 68.301 | α = 90 |
b = 94.106 | β = 90 |
c = 117.383 | γ = 90 |
Symmetry | |
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Space Group | I 2 2 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 | CCD | MARMOSAIC 225 mm CCD | 2006-06-16 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
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ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | SYNCHROTRON | SLS BEAMLINE X10SA | 0.97600 | SLS | X10SA |
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 | 1.21 | 73.52 | 99 | 0.0501 | 23.09 | 7.16 | 113895 | 113895 |
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) | |||||||||||
1.21 | 1.3 | 97.5 | 0.1849 | 10.93 | 6.48 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | 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 | MOLECULAR REPLACEMENT | THROUGHOUT | PDB entry 1QM4 | 1.21 | 73.52 | 108185 | 108185 | 5709 | 99.01 | 0.1008 | 0.1008 | 0.09981 | 0.11946 | RANDOM | 7.3 |
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] | |
0.75 | -0.57 | -0.18 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 36.312 |
r_dihedral_angle_4_deg | 21.319 |
r_dihedral_angle_3_deg | 11.051 |
r_sphericity_free | 7.745 |
r_dihedral_angle_1_deg | 6.622 |
r_scangle_it | 3.736 |
r_sphericity_bonded | 3.117 |
r_scbond_it | 2.894 |
r_mcangle_it | 1.944 |
r_angle_refined_deg | 1.615 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 3030 |
Nucleic Acid Atoms | |
Solvent Atoms | 524 |
Heterogen Atoms | 28 |
Software
Software | |
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Software Name | Purpose |
REFMAC | refinement |
MAR345 | data collection |
HKL-2000 | data reduction |
HKL-2000 | data scaling |
PHASER | phasing |