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X-RAY DIFFRACTION
Materials and Methods page
1BWH
  •   Crystallization Hide
    Crystallization Experiments
    pH 4.7
    Details CRYSTALLISATION TOOK PLACE AS A GROUND CONTROL TO HEWL CRYSTALLISATION IN THE EUROPEAN SPACE AGENCY (ESA) ADVANCED PROTEIN CRYSTALLISATION FACILITY (APCF) ONBOARD THE NASA SPACE SHUTTLE'S LIFE AND MICROGRAVITY SPACELAB (LMS) MISSION (STS-78). A SOLUTION OF 21 MG OF HEN EGG WHITE LYSOZYME (3 X CRYSTALLIZED, DIALYSED AND LYOPHILIZED POWDER OF CHICKEN EGG WHITE LYSOZYME SUPPLIED BY SIGMA, L-6876 BATCH NUMBER, LOT 53H7145) DISSOLVED IN 250 UL 0.04 M ACETATE BUFFER (PH 4.7) WAS USED TO FILL THE PROTEIN CHAMBER (188 UL). THE SALT CHAMBERS (541 UL) WERE FILLED WITH 1.35 M NACL AND THE BUFFER CHAMBER (59 UL) WITH 0.04 M ACETATE BUFFER (PH 4.7). SODIUM AZIDE WAS ALSO ADDED TO THE PROTEIN AND BUFFER SOLUTION AS AN ANTI-FUNGAL AGENT (1.92 MG PER 188 UL). CRYSTALLISATION TOOK PLACE AT 20+/-1 C.
     
  •   Crystal Data Hide
    Unit Cell
    Length    (Å) Angle    (°)
    a = 79.27 α = 90
    b = 79.27 β = 90
    c = 37.96 γ = 90
     
    Space Group
    Space Group Name:    P 43 21 2
     
     
  •   Diffraction Hide
    Diffraction Experiment
    Diffrn ID 1
    Data Collection Temperature 293
     
    Diffraction Detector
    Detector IMAGE PLATE
    Type RIGAKU RAXIS IIC
     
    Diffraction Radiation
    Monochromator CARBON
    Diffraction Protocol SINGLE WAVELENGTH
     
    Diffraction Source
    Source ROTATING ANODE
    Type RIGAKU RU200
    Wavelength 0.7107
     
     
  •   Refinement Data Hide
    Reflection Details
    Resolution(High) 1.7
    Resolution(Low) 99
    Number Reflections(Observed) 12309
    Percent Possible(Observed) 88.8
    R Merge I(Observed) 0.069
    Redundancy 5.9
     
     
  •   Refinement Hide
    Refinement Statistics
    Structure Solution Method MOLECULAR REPLACEMENT
    reflnsShellList 1.8
    Resolution(Low) 20.0
    Cut-off Sigma(F) 0.0
    Number of Reflections(Observed) 10967
    Percent Reflections(Observed) 94.0
    R-Factor(Observed) 0.184
    R-Work 0.184
    R-Free 0.233
    R-Free Selection Details RANDOM
     
    Temperature Factor Modeling
    Mean Isotropic B Value 23.2
     
    RMS Deviations
    Parameter Type Deviation from Ideal
    x_improper_angle_d 1.082
    x_bond_d 0.007
    x_angle_deg 1.566
    x_dihedral_angle_d 21.92
     
    Number of Non-Hydrogen Atoms Used in Refinement
    Protein Atoms 1001
    Nucleic Acid Atoms 0
    Heterogen Atoms 0
    Solvent Atoms 92
     
     
  •   Software and Computing Hide
    Computing
    Data Reduction (intensity integration) DENZO
    Data Reduction (data scaling) SCALEPACK
    Structure Refinement X-PLOR 3.1
     
    Software
    refinement X-PLOR version: 3.1
    data reduction SCALEPACK
    data collection DENZO