3QL0

Crystal structure of N23PP/S148A mutant of E. coli dihydrofolate reductase


X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, SITTING DROP7.52770.2 M calcium acetate, 0.1 M HEPES, 40% v/v PEG 400, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 277K
Crystal Properties
Matthews coefficientSolvent content
3.6266.02

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 79.662α = 90
b = 79.662β = 90
c = 71.464γ = 120
Symmetry
Space GroupP 32 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray80CCDMARMOSAIC 300 mm CCD2010-03-10MSINGLE WAVELENGTH
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONAPS BEAMLINE 23-ID-D1.033APS23-ID-D

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (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
11.65099.63569535547
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
1.61.64297.6

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodResolution (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 REPLACEMENTTHROUGHOUT1.649.6331133163993.710.210290.208490.24534RANDOM14.373
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]
0.280.140.28-0.42
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.153
r_dihedral_angle_4_deg14.257
r_dihedral_angle_3_deg13.266
r_dihedral_angle_1_deg5.334
r_scangle_it3.082
r_scbond_it1.889
r_angle_refined_deg1.539
r_mcangle_it1.075
r_angle_other_deg0.886
r_mcbond_it0.589
RMS Deviations
KeyRefinement Restraint Deviation
r_dihedral_angle_2_deg35.153
r_dihedral_angle_4_deg14.257
r_dihedral_angle_3_deg13.266
r_dihedral_angle_1_deg5.334
r_scangle_it3.082
r_scbond_it1.889
r_angle_refined_deg1.539
r_mcangle_it1.075
r_angle_other_deg0.886
r_mcbond_it0.589
r_mcbond_other0.17
r_chiral_restr0.086
r_bond_refined_d0.011
r_gen_planes_refined0.007
r_bond_other_d0.002
r_gen_planes_other0.002
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms1273
Nucleic Acid Atoms
Solvent Atoms199
Heterogen Atoms83

Software

Software
Software NamePurpose
Blu-Icedata collection
PHASERphasing
REFMACrefinement
HKL-2000data reduction
XPREPdata reduction