Indexing amyloid peptide diffraction from serial femtosecond crystallography: New algorithms for sparse patterns
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Physical Biosciences Division.
- Univ. of California, Los Angeles, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Los Angeles, CA (United States)
Still diffraction patterns from peptide nanocrystals with small unit cells are challenging to index using conventional methods owing to the limited number of spots and the lack of crystal orientation information for individual images. New indexing algorithms have been developed as part of theComputational Crystallography Toolbox(cctbx) to overcome these challenges. Accurate unit-cell information derived from an aggregate data set from thousands of diffraction patterns can be used to determine a crystal orientation matrix for individual images with as few as five reflections. These algorithms are potentially applicable not only to amyloid peptides but also to any set of diffraction patterns with sparse properties, such as low-resolution virus structures or high-throughput screening of still images captured by raster-scanning at synchrotron sources. As a proof of concept for this technique, successful integration of X-ray free-electron laser (XFEL) data to 2.5 Å resolution for the amyloid segment GNNQQNY from the Sup35 yeast prion is presented.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC02-05CH11231; FC02-02ER63421
- OSTI ID:
- 1190539
- Journal Information:
- Acta Crystallographica. Section D: Biological Crystallography (Online), Vol. 71, Issue 2; ISSN 1399-0047
- Publisher:
- International Union of CrystallographyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Data-driven challenges and opportunities in crystallography
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journal | July 2019 |
Ab initio structure determination from prion nanocrystals at atomic resolution by MicroED
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journal | September 2016 |
SPIND : a reference-based auto-indexing algorithm for sparse serial crystallography data
|
journal | January 2019 |
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