Phasing coherently illuminated nanocrystals bounded by partial unit cells

Richard A. Kirian, Richard J. Bean, Kenneth R. Beyerlein, Oleksandr M. Yefanov, Thomas A. White, Anton Barty, Henry N. Chapman

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

With the use of highly coherent femtosecond X-ray pulses from a free-electron laser, it is possible to record protein nanocrystal diffraction patterns with far more information than is present in conventional crystallographic diffraction data. It has been suggested that diffraction phases may be retrieved from such data via iterative algorithms, without the use of a priori information and without restrictions on resolution. Here, we investigate the extension of this approach to nanocrystals with edge terminations that produce partial unit cells, and hence cannot be described by a common repeating unit cell. In this situation, the phase problemdescribed in previouswork must be reformulated. We demonstrate an approximate solution to this phase problem for crystals with random edge terminations.

Original languageEnglish (US)
Article number20130331
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Volume369
Issue number1647
DOIs
StatePublished - Jul 17 2014

Keywords

  • Coherent diffractive imaging
  • Free-electron laser
  • Protein crystallography

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

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