1XFT

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


Experimental Data Snapshot

  • Method: POWDER DIFFRACTION

wwPDB Validation 3D Report Full Report


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.,Sect.D 61: 423-432

  • DOI: 10.1107/S0907444905001393

  • 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 wa ...

    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: 
    • X-ray structure of monoclinic turkey egg lysozyme at 1.3 A resolution
      Harata, K.
      (1993) Acta Crystallogr.,Sect.D 49: 497
    • Binding of N-acetylglucosamine to chicken egg lysozyme: a powder diffraction study
      Von Dreele, R.B.
      (2001) Acta Crystallogr.,Sect.D 57: 1836
    • Structure of hexagonal turkey egg-white lysozyme at 1.65A resolution
      Howell, P.L.
      (1995) Acta Crystallogr.,Sect.D 51: 654
    • 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.,Sect.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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme C
A
129Meleagris gallopavoMutation(s): 0 
Gene Names: LYZ
EC: 3.2.1.17
Find proteins for P00703 (Meleagris gallopavo)
Go to Gene View: LYZ
Go to UniProtKB:  P00703
Experimental Data & Validation

Experimental Data

  • Method: POWDER DIFFRACTION
Software Package:
Software NamePurpose
MOLREPphasing
ID31SUMdata scaling
SPECdata reduction
GSASrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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