7LTP

The internal aldimine 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, cesium ion at the metal coordination site and the product L-tryptophan at the enzyme beta-site at 1.47 Angstrom resolution


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 4HT3 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP7.829850 mM Bicine-CsOH, 10% PEG 8,000, 2 mM Spermine, pH 7.8
Crystal Properties
Matthews coefficientSolvent content
2.5451.61

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 182.414α = 90
b = 59.223β = 94.84
c = 67.186γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100IMAGE PLATERIGAKU RAXIS IV++VariMax HighFlux2020-11-09MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU MICROMAX-007 HF1.5418

Data Collection

Overall
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)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
11.46990.88286.10.0320.0320.0540.028183.3104631
Highest Resolution Shell
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)RedundancyNumber Unique Reflections (All)
11.471.5528.50.1990.1990.2730.1893.22

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT4HT31.4739.1699485513286.110.13470.1330.1665RANDOM18.8
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]
-0.130.110.19-0.08
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg33.644
r_dihedral_angle_4_deg16.677
r_dihedral_angle_3_deg12.127
r_dihedral_angle_1_deg6.164
r_angle_refined_deg1.23
r_rigid_bond_restr1.175
r_chiral_restr0.091
r_gen_planes_refined0.006
r_bond_refined_d0.005
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4931
Nucleic Acid Atoms
Solvent Atoms707
Heterogen Atoms93

Software

Software
Software NamePurpose
xia2data reduction
SCALAdata scaling
MOLREPphasing
DMphasing
REFMACrefinement
PDB_EXTRACTdata extraction