6BD3

Saccharomyces cerevisiae acetohydroxyacid synthase


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP5.829134 mg/ml enzyme incubated with 1.4 mM ThDP, 0.5 mM FAD, 14 mM MgCl2, 0.7 mM BSM and 4.5 mM DTT. Crystals were obtained my mixing equal volumes (300 nl) of well solution (1.6M Na/K hydrogen phosphate pH 6.5) and complex solution. Crystals were soaked with pyruvate (pyruvate powder added to the drop) for three weeks
Crystal Properties
Matthews coefficientSolvent content
3.1360.68

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 95.898α = 90
b = 108.766β = 90
c = 180.001γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDADSC QUANTUM 210rMirrors2014-12-12MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAUSTRALIAN SYNCHROTRON BEAMLINE MX10.9537Australian SynchrotronMX1

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)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
12.2847.9499.50.07711.84.986039
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
12.282.3193.30.7591.84.7

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONFREE R-VALUE2.2847.3061.3486040199999.580.17180.1710.2006
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
KeyRefinement Restraint Deviation
f_dihedral_angle_d15.121
f_angle_d0.842
f_chiral_restr0.054
f_bond_d0.004
f_plane_restr0.003
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms8310
Nucleic Acid Atoms
Solvent Atoms320
Heterogen Atoms193

Software

Software
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing