2A6U

pH evolution of tetragonal HEWL at 4 degrees Celcius.


Experimental Data Snapshot

  • Method: POWDER DIFFRACTION

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

High-throughput phase-diagram mapping via powder diffraction: a case study of HEWL versus pH.

Basso, S.Fitch, A.N.Fox, G.C.Margiolaki, I.Wright, J.P.

(2005) Acta Crystallogr.,Sect.D 61: 1612-1625

  • DOI: 10.1107/S0907444905031963

  • PubMed Abstract: 
  • 44 samples of tetragonal hen egg-white lysozyme (HEWL) were obtained as a series of polycrystalline precipitates at 277 K and room temperature in the pH range between 6.56 and 3.33. The precipitates were investigated by the collection of high-resolut ...

    44 samples of tetragonal hen egg-white lysozyme (HEWL) were obtained as a series of polycrystalline precipitates at 277 K and room temperature in the pH range between 6.56 and 3.33. The precipitates were investigated by the collection of high-resolution powder X-ray diffraction data at 295 K, which reveal the tetragonal or orthorhombic forms of lysozyme depending on the temperature and pH of crystallization. The use of a new robotic sample changer greatly facilitated these measurements. LeBail analyses of the powder patterns display a characteristic behaviour for the pH dependence of the tetragonal unit-cell parameters of HEWL crystallized at both temperatures. More detailed analysis shows that molecular replacement can give a suitable starting point for structural refinements, illustrating that powder data can be sufficient for this approach. Pawley or Rietveld refinements that fit a single model to four data sets simultaneously from four samples crystallized at pH values across the range studied benefit from improved powder data quality via the anisotropic changes in the unit cell. The Rietveld analysis gave an average structural model with excellent goodness of fit and stereochemistry.


    Organizational Affiliation

    European Synchrotron Radiation Facility, Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme C
A
129Gallus gallusMutation(s): 0 
Gene Names: LYZ
EC: 3.2.1.17
Find proteins for P00698 (Gallus gallus)
Go to Gene View: LYZ
Go to UniProtKB:  P00698
Experimental Data & Validation

Experimental Data

  • Method: POWDER DIFFRACTION
Software Package:
Software NamePurpose
ID31SUMdata scaling
GSASrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2005-07-04 
  • Released Date: 2006-01-03 
  • Deposition Author(s): Margiolaki, I.

Revision History 

  • Version 1.0: 2006-01-03
    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: 2018-04-25
    Type: Data collection