European Biophysics Journal

, Volume 35, Issue 7, pp 621–632 | Cite as

Optimizing crystal volume for neutron diffraction: D-xylose isomerase

  • Edward H. Snell
  • Mark J. van der Woerd
  • Michael Damon
  • Russell A. Judge
  • Dean A. A. Myles
  • Flora Meilleur


Neutron diffraction is uniquely sensitive to hydrogen positions and protonation state. In that context structural information from neutron data is complementary to that provided through X-ray diffraction. However, there are practical obstacles to overcome in fully exploiting the potential of neutron diffraction, i.e. low flux and weak scattering. Several approaches are available to overcome these obstacles and we have investigated the simplest: increasing the diffracting volume of the crystals. Volume is a quantifiable metric that is well suited for experimental design and optimization techniques. By using response surface methods we have optimized the xylose isomerase crystal volume, enabling neutron diffraction while we determined the crystallization parameters with a minimum of experiments. Our results suggest a systematic means of enabling neutron diffraction studies for a larger number of samples that require information on hydrogen position and/or protonation state.


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Copyright information

© EBSA 2006

Authors and Affiliations

  • Edward H. Snell
    • 1
  • Mark J. van der Woerd
    • 2
  • Michael Damon
    • 2
  • Russell A. Judge
    • 3
  • Dean A. A. Myles
    • 4
  • Flora Meilleur
    • 5
  1. 1.Hauptman-Woodward Medical Research Institute BuffaloUSA
  2. 2.BAE SystemsHuntsvilleUSA
  3. 3.Abbott LaboratoriesAbbott ParkUSA
  4. 4.Oak Ridge National LaboratoryOak RidgeUSA
  5. 5.Institut Laue LangevinGrenobleFrance

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