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X-RAY DIFFRACTION
Materials and Methods page
1B2K
  •   Crystallization Hide
    Crystallization Experiments
    pH 4.5
    Temperature 291.0
    Details THE ISOIONIC PROTEIN HEWL WAS ACIDIFIED BY ADDING OF HI UNTIL THE PH 4.5 WAS REACHED AT 291K WERE 25 MG/ML OF PROTEIN AND 0.07 M OF NAI VERSUS A WELL CONTAINING 0.14 M OF NAI AT PH4.5
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 27.73 α = 90
    b = 62.79 β = 90.1
    c = 59.84 γ = 90
     
    Space Group
    Space Group Name:    P 1 21 1
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 293
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type MARRESEARCH
    Collection Date 1992-12-01
     
    Diffraction Radiation
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source SYNCHROTRON
    Type LURE BEAMLINE DW32
    Wavelength 0.901
    Site LURE
    Beamline DW32
     
     
  •   Refinement Data Hide
    Reflection Details
    Observed Criterion Sigma(I) 0.0
    Resolution(High) 1.6
    Resolution(Low) 13.3
    Number Reflections(Observed) 26152
    Percent Possible(Observed) 96.7
    B(Isotropic) From Wilson Plot 15.2
    Redundancy 3.1
     
    High Resolution Shell Details
    Resolution(High) 1.6
    Resolution(Low) 1.64
    Percent Possible(All) 95.6
    Mean I Over Sigma(Observed) 1.3
    R-Sym I(Observed) 0.54
    Redundancy 2.8
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 1.6
    Resolution(Low) 8.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(Observed) 26000
    Number of Reflections(R-Free) 2612
    Percent Reflections(Observed) 96.6
    R-Factor(Observed) 0.198
    R-Work 0.198
    R-Free 0.237
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Isotropic Thermal Model RESTRAINED
    Mean Isotropic B Value 16.4
     
    Resolution Shells
    Refinement method X-RAY DIFFRACTION
    Shell Resolution(High) 1.6
    Shell Resolution(Low) 1.67
    Number of Reflections(R-Free) 320
    Number of Reflections(R-Work) 2861
    R-Factor(R-Work) 0.294
    R-Factor(R-Free) 0.345
    Percent Reflections(Observed) 95.3
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_scangle_it 3.7
    x_scbond_it 3.21
    x_mcangle_it 2.73
    x_mcbond_it 2.5
    x_improper_angle_d 0.59
    x_bond_d 0.004
    x_angle_deg 1.16
    x_dihedral_angle_d 25.27
     
    Coordinate Error
    Luzzati ESD(Observed) 0.18
    Luzzati Resolution Cutoff(Low) 5.0
    Luzzati ESD(R-Free Set) 0.22
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 2002
    Nucleic Acid Atoms 0
    Heterogen Atoms 17
    Solvent Atoms 291
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) MOSFLM
    Data Reduction (data scaling) AGROVATA
    Structure Solution AMORE
    Structure Refinement X-PLOR 3.851
     
    Software
    refinement X-PLOR version: 3.851
    model building AMORE
    data reduction AGROVATA/CCP4
    data collection MOSFLM