1XFT

Synchrotron X-ray Powder Diffraction Study of Hexagonal Turkey Egg-white Lysozyme


Experimental Data Snapshot

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    This is version 1.3 of the entry. See complete history


    Literature

    Synchrotron X-ray powder diffraction study of hexagonal turkey egg-white lysozyme.

    Margiolaki, I.Wright, J.P.Fitch, A.N.Fox, G.C.Von Dreele, R.B.

    (2005) Acta Crystallogr D Biol Crystallogr 61: 423-432

    • DOI: 10.1107/S0907444905001393
    • Primary Citation of Related Structures:  
      1XFT

    • PubMed Abstract: 
    • The structure of turkey egg-white lysozyme (TEWL) has been refined from high-resolution X-ray powder diffraction data. The sample was rapidly obtained as a polycrystalline precipitate at high protein concentration using 0.5 M NaCl solvent pH 6 and was deposited in the PDB with code 1xft ...

      The structure of turkey egg-white lysozyme (TEWL) has been refined from high-resolution X-ray powder diffraction data. The sample was rapidly obtained as a polycrystalline precipitate at high protein concentration using 0.5 M NaCl solvent pH 6 and was deposited in the PDB with code 1xft. The diffraction data were collected at room temperature. Molecular replacement was shown to give a suitable starting point for refinement, illustrating that powder data can be sufficient for this approach. Crystallographic models were then refined by combined Rietveld and stereochemical restraint analysis of the powder data (d(min) = 3.35 A), resulting in the extraction of reliable lattice parameters and the refinement of the molecular conformation at room temperature. The structure is hexagonal [space group P6(1)22, unit-cell parameters a = 71.0862 (3), c = 85.0276 (5) A] with 12 symmetry-related molecules in the unit cell, in agreement with previous studies. The results of our analysis are indicative of specific amino acids being disordered at this temperature. Upon cooling, a sudden drop in the lattice parameters at approximately 250 K is observed concurrently with the freezing of the mother liquor. The observation of severe peak broadening below this temperature indicates strain effects accompanying the freezing transition, which are found to be reversible. Finally, a correlation between the unit-cell parameters and the pH of the buffer solution is evident, in a similar manner to earlier observations on HEWL.


      Related Citations: 
      • Binding of N-acetylglucosamine to chicken egg lysozyme: a powder diffraction study
        Von Dreele, R.B.
        (2001) Acta Crystallogr D Biol Crystallogr 57: 1836
      • Structure of hexagonal turkey egg-white lysozyme at 1.65A resolution
        Howell, P.L.
        (1995) Acta Crystallogr D Biol Crystallogr 51: 654
      • X-ray structure of monoclinic turkey egg lysozyme at 1.3 A resolution
        Harata, K.
        (1993) Acta Crystallogr D Biol Crystallogr 49: 497
      • Structure determination of turkey egg-white lysozyme using Laue diffraction data
        Howell, P.L., Almo, S.C., Parsons, M.R., Hajdu, J., Petsko, G.A.
        (1992) Acta Crystallogr B 48: 200

      Organizational Affiliation

      European Synchrotron Radiation Facility, BP-220, F-38043, Grenoble CEDEX 9, France. margiolaki@esrf.fr



    Macromolecules
    Find similar proteins by:  (by identity cutoff)  |  Structure
    Entity ID: 1
    MoleculeChainsSequence LengthOrganismDetailsImage
    Lysozyme CA129Meleagris gallopavoMutation(s): 0 
    Gene Names: LYZ
    EC: 3.2.1.17
    UniProt
    Find proteins for P00703 (Meleagris gallopavo)
    Explore P00703 
    Go to UniProtKB:  P00703
    Protein Feature View
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    • Reference Sequence
    Experimental Data & Validation

    Experimental Data

    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 71.086α = 90
    b = 71.086β = 90
    c = 85.028γ = 120
    Software Package:
    Software NamePurpose
    GSASrefinement
    SPECdata reduction
    ID31SUMdata scaling
    MOLREPphasing

    Structure Validation

    View Full Validation Report




    Entry History 

    Deposition Data

    Revision History  (Full details and data files)

    • Version 1.0: 2005-04-05
      Type: Initial release
    • Version 1.1: 2008-04-30
      Changes: Version format compliance
    • Version 1.2: 2011-07-13
      Changes: Version format compliance
    • Version 1.3: 2017-10-11
      Changes: Data collection