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An Information Portal to 108957 Biological Macromolecular Structures

X-RAY DIFFRACTION
Materials and Methods page
1HW3
  •   Crystallization Hide
    Crystallization Experiments
    Method VAPOR DIFFUSION, HANGING DROP
    pH 7.8
    Temperature 298.0
    Details ammonium sulfate, tris buffer, potassium phosphate, 2-mercaptoethanol, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 95.82 α = 90
    b = 95.82 β = 90
    c = 83.21 γ = 120
     
    Space Group
    Space Group Name:    P 31 2 1
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 120
     
    Diffraction Detector
    Detector CCD
    Type SBC-1
    Details monochromators
    Collection Date 2000-08-25
     
    Diffraction Radiation
    Monochromator Double Crystals (Si-111, Si-220)
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type APS BEAMLINE 19-ID
    Wavelength List 0.9793
    Site APS
    Beamline 19-ID
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma (F) 2.0
    Observed Criterion Sigma(I) 2.0
    Resolution(High) 2
    Resolution(Low) 20
    Number Reflections(All) 29971
    Number Reflections(Observed) 28819
    Percent Possible(Observed) 96.0
    R Merge I(Observed) 0.033
    B(Isotropic) From Wilson Plot 14.5
    Redundancy 1.9
     
    High Resolution Shell Details
    Resolution(High) 2.0
    Resolution(Low) 2.07
    Percent Possible(All) 100.0
    R Merge I(Observed) 0.31
    Redundancy 1.9
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 2.0
    Resolution(Low) 6.0
    Cut-off Sigma(I) 2.0
    Cut-off Sigma(F) 3.0
    Number of Reflections(all) 29017
    Number of Reflections(Observed) 24466
    Number of Reflections(R-Free) 1192
    Percent Reflections(Observed) 84.2
    R-Work 0.203
    R-Free 0.23
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model RESTRAINED
    Mean Isotropic B Value 34.8
    Anisotropic B[1][1] 0.0
    Anisotropic B[1][2] 0.0
    Anisotropic B[1][3] 0.0
    Anisotropic B[2][2] 0.0
    Anisotropic B[2][3] 0.0
    Anisotropic B[3][3] 0.0
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 2.0
    Shell Resolution(Low) 2.12
    Number of Reflections(R-Free) 139
    Number of Reflections(R-Work) 2828
    R-Factor(R-Work) 0.263
    R-Factor(R-Free) 0.274
    R-Free Error 0.023
    Percent Reflections(Observed) 62.0
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    c_scangle_it 2.87
    c_scbond_it 1.97
    c_mcangle_it 2.06
    c_mcbond_it 1.31
    c_improper_angle_d 0.81
    c_dihedral_angle_d 23.6
    c_angle_deg 1.3
    c_bond_d 0.009
     
    Coordinate Error
    Luzzati ESD(Observed) 0.24
    Luzzati Sigma A(Observed) 0.24
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.27
    Luzzati Sigma A(R-Free Set) 0.28
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 2141
    Nucleic Acid Atoms 0
    Heterogen Atoms 24
    Solvent Atoms 211
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) D*TREK
    Data Reduction (data scaling) SCALEPACK
    Structure Solution CNS
    Structure Refinement CNS 1.0
     
    Software
    refinement CNS version: 1.0
    model building CNS