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X-RAY DIFFRACTION
Materials and Methods page
1PXK
  •   Crystallization Hide
    Crystallization Experiments
    Method VAPOR DIFFUSION, HANGING DROP
    pH 7.8
    Temperature 277.0
    Details PEG 6000, NA-HEPES, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 52.74 α = 90
    b = 71.95 β = 90
    c = 70.53 γ = 90
     
    Space Group
    Space Group Name:    P 21 21 21
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 100
     
    Diffraction Detector
    Detector CCD
    Type ADSC QUANTUM 4
    Collection Date 2003-01-01
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type EMBL/DESY, HAMBURG BEAMLINE BW7A
    Wavelength List 0.97
    Site EMBL/DESY, HAMBURG
    Beamline BW7A
     
     
  •   Refinement Data Hide
    Reflection Details
    Resolution(High) 2.8
    Resolution(Low) 20
    Number Reflections(All) 6931
    Number Reflections(Observed) 6931
    Percent Possible(Observed) 99.3
    R Merge I(Observed) 0.089
    B(Isotropic) From Wilson Plot 77.2
    Redundancy 3.0
     
    High Resolution Shell Details
    Resolution(High) 2.8
    Resolution(Low) 2.98
    Percent Possible(All) 99.3
    R Merge I(Observed) 0.597
    Mean I Over Sigma(Observed) 1.1
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 2.8
    Resolution(Low) 19.83
    Cut-off Sigma(F) 0.0
    Number of Reflections(all) 6914
    Number of Reflections(Observed) 6914
    Number of Reflections(R-Free) 384
    Percent Reflections(Observed) 99.2
    R-Factor(All) 0.21
    R-Factor(Observed) 0.208
    R-Work 0.208
    R-Free 0.266
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model RESTRAINED
    Mean Isotropic B Value 63.9
    Anisotropic B[1][1] -0.17
    Anisotropic B[1][2] 0.0
    Anisotropic B[1][3] 0.0
    Anisotropic B[2][2] -8.58
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] 8.75
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 2.8
    Shell Resolution(Low) 2.98
    Number of Reflections(Observed) 1076
    Number of Reflections(R-Free) 66
    Number of Reflections(R-Work) 1076
    R-Factor(R-Work) 0.336
    R-Factor(R-Free) 0.389
    R-Free Error 0.048
    Percent Reflections(Observed) 100.0
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    c_scangle_it 3.32
    c_scbond_it 2.11
    c_mcangle_it 3.45
    c_mcbond_it 1.92
    c_improper_angle_d 0.79
    c_bond_d 0.007
    c_angle_deg 1.2
    c_dihedral_angle_d 22.9
     
    Coordinate Error
    Luzzati ESD(Observed) 0.33
    Luzzati Sigma A(Observed) 0.48
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.46
    Luzzati Sigma A(R-Free Set) 0.53
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 2335
    Nucleic Acid Atoms 0
    Heterogen Atoms 17
    Solvent Atoms 9
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) MOSFLM
    Data Reduction (data scaling) CCP4 (SCALA)
    Structure Solution MOLREP
    Structure Refinement CNS 1.0
     
    Software
    refinement CNS version: 1.0