X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 7DFR 

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP6.5293.15Sitting drop of final volume of 0.8 uL was set up by 1:1 v/v mixing of 15 mg/mL E. coli DHFR working stock with reservoir solution containing 0.1M MES pH 6.5, 27.5% PEG 3350, 0.4M MgCl2. E. coli DHFR working stock was prepared from a 1:1 v/v mixture of 30 mg/ml protein in 20 mM Tris pH 8, 1mM DTT with 50 mM HEPES pH 7.3, 100 mM NaCl. Crystals harvested after 2 weeks growth and cryoprotected with mitegen LV oil before flash freezing in N2.
Crystal Properties
Matthews coefficientSolvent content
1.7831.02

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 33.698α = 90
b = 51.525β = 90
c = 77.421γ = 90
Symmetry
Space GroupP 21 21 21

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray100CCDRAYONIX MX-225Diamond(111)2017-11-30MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 31-ID0.97931APS31-ID

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)CC (Half)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
11.10830.94997.90.0670.0730.99913.446.2555326511.47
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Rrim I (All)CC (Half)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
11.1081.1887.30.8611.0510.5711.162.804

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 REPLACEMENTTHROUGHOUT7DFR1.10830.9491.3453202199397.820.17920.17860.196118.63
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_d13.574
f_angle_d1.334
f_chiral_restr0.078
f_bond_d0.009
f_plane_restr0.007
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1328
Nucleic Acid Atoms
Solvent Atoms202
Heterogen Atoms60

Software

Software
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction