5DEN

The First Structure of a Full-Length Mammalian Phenylalanine Hydroxylase Reveals the Architecture of an Auto-inhibited Tetramer


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1PHZ 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP6.5293.15Protein was stored at -80C, then thawed in a water bath at 25C for ~ 20 minutes. The protein, at a concentration of 9.5 mg/mL was diluted to 5.5 mg/mL using 30 mM Tris pH 7.4, 116 mM KCl, 15% glycerol. The diluted protein was left at 4C for ~ hours, then at room temperature for ~ 20 minutes prior to preparation of the crystallization tray. The 2 uL hanging drop (containing 1:1 protein:reservoir) hung over a reservoir solution containing 140 mM Na-acetate, 70 mM Na-citrate, 100 mM Na-cacodylate (pH 6.5), and 31.5% PEG 1,000 (Hampton Research).
Crystal Properties
Matthews coefficientSolvent content
2.4449.68

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 113.78α = 90
b = 89.16β = 104.53
c = 196.81γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100PIXELDECTRIS PILATUS 6M2014-09-25MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X251.1NSLSX25

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
12.938.191.010.0689.061.938661
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)
12.93.00476.490.3731.561.56

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (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 DIFFRACTIONMOLECULAR REPLACEMENTTHROUGHOUT1PHZ2.938.11.3538628193090.930.24170.23840.303181.3783
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_d8.549
f_angle_d0.381
f_chiral_restr0.037
f_plane_restr0.003
f_bond_d0.002
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms13706
Nucleic Acid Atoms
Solvent Atoms8
Heterogen Atoms4

Software

Software
Software NamePurpose
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XDSdata scaling
Cootmodel building