7L03
The aminoacrylate form of the wild-type Salmonella typhimurium Tryptophan Synthase in complex with inhibitor N-(4'-trifluoromethoxybenzenesulfonyl)-2-amino-1-ethylphosphate (F9F) at the enzyme alpha-site and sodium ion at the metal coordination site at 1.60 Angstrom resolution. Three water molecules are close to the amynoacrylate at the enzyme beta-site
X-RAY DIFFRACTION
Starting Model(s)
Initial Refinement Model(s) | |||
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Type | Source | Accession Code | Details |
experimental model | PDB | 4HT3 |
Crystallization
Crystalization Experiments | ||||
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ID | Method | pH | Temperature | Details |
1 | VAPOR DIFFUSION, SITTING DROP | 7.8 | 298 | 50 mM Bicine-CsOH, 10% PEG 8,000, 2 mM Spermine, pH 7.8 |
Crystal Properties | |
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Matthews coefficient | Solvent content |
2.54 | 51.61 |
Crystal Data
Unit Cell | |
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Length ( Å ) | Angle ( ˚ ) |
a = 182.49 | α = 90 |
b = 59.05 | β = 95.02 |
c = 67.245 | 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 | IMAGE PLATE | RIGAKU RAXIS IV++ | VariMax HighFlux | 2020-08-18 | M | SINGLE WAVELENGTH |
Radiation Source | |||||
---|---|---|---|---|---|
ID # | Source | Type | Wavelength List | Synchrotron Site | Beamline |
1 | ROTATING ANODE | RIGAKU MICROMAX-007 HF | 1.5418 |
Data Collection
Overall | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (Observed) | R Merge I (Observed) | R Sym I (Observed) | Rrim I (All) | Rpim I (All) | 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 | 1.599 | 90.895 | 95.4 | 0.028 | 0.028 | 0.038 | 0.023 | 13.5 | 2.4 | 89582 |
Highest Resolution Shell | |||||||||||||||||||
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ID # | Resolution (High) | Resolution (Low) | Percent Possible (All) | Percent Possible (Observed) | R Merge I (Observed) | R-Sym I (Observed) | Rrim I (All) | Rpim I (All) | Mean I Over Sigma (Observed) | Redundancy | Number Unique Reflections (All) | ||||||||
1 | 1.6 | 1.69 | 85.2 | 0.142 | 0.142 | 0.193 | 0.12 | 5 | 2.2 |
Refinement
Statistics | |||||||||||||||||||
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Diffraction ID | Structure Solution Method | Cross Validation method | Starting model | Resolution (High) | Resolution (Low) | Number Reflections (Observed) | Number Reflections (R-Free) | Percent Reflections (Observed) | R-Factor (Observed) | R-Work | R-Free | R-Free Selection Details | Mean Isotropic B | ||||||
X-RAY DIFFRACTION | MOLECULAR REPLACEMENT | THROUGHOUT | 4HT3 | 1.6 | 39.24 | 85084 | 4427 | 95.08 | 0.1731 | 0.1705 | 0.2242 | RANDOM | 23.412 |
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] | |
0.43 | 0.04 | -0.43 |
RMS Deviations | |
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Key | Refinement Restraint Deviation |
r_dihedral_angle_2_deg | 34.398 |
r_dihedral_angle_4_deg | 21.923 |
r_dihedral_angle_3_deg | 13.729 |
r_dihedral_angle_1_deg | 6.673 |
r_rigid_bond_restr | 4.605 |
r_angle_refined_deg | 1.627 |
r_chiral_restr | 0.109 |
r_gen_planes_refined | 0.01 |
r_bond_refined_d | 0.009 |
Non-Hydrogen Atoms Used in Refinement | |
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Non-Hydrogen Atoms | Number |
Protein Atoms | 4958 |
Nucleic Acid Atoms | |
Solvent Atoms | 717 |
Heterogen Atoms | 82 |
Software
Software | |
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Software Name | Purpose |
xia2 | data reduction |
SCALA | data scaling |
MOLREP | phasing |
DM | phasing |
REFMAC | refinement |
PDB_EXTRACT | data extraction |