Reproducible radiation-damage processes in proteins irradiated by intense x-ray pulses
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
X-ray free-electron lasers have enabled femtosecond protein nanocrystallography, a novel method to determine the structure of proteins. It allows time-resolved imaging of nanocrystals that are too small for conventional crystallography. The short pulse duration helps in overcoming the detrimental effects of radiation damage because x rays are scattered before the sample has been significantly altered. It has been suggested that, fortuitously, the diffraction process self-terminates abruptly once radiation damage destroys the crystalline order. Our calculations show that high-intensity x-ray pulses indeed trigger a cascade of damage processes in ferredoxin crystals, a particular metalloprotein of interest. However, we found that the damage process is initially not completely random. Correlations exist among the protein monomers, so that Bragg diffraction still occurs in the damaged crystals, despite significant atomic displacements. Our results show that the damage process is reproducible to a certain degree, which is potentially beneficial for the orientation step in single-molecule imaging.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1809183
- Alternate ID(s):
- OSTI ID: 1181631
- Report Number(s):
- LLNL-JRNL-662682; 783833; TRN: US2212979
- Journal Information:
- Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, Vol. 91, Issue 2; ISSN 1539-3755
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Capturing the photo-induced dynamics of nano-molecules by X-ray free electron laser induced Coulomb explosion
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journal | September 2019 |
Radiation damage in protein crystallography at X-ray free-electron lasers
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journal | December 2017 |
Serial millisecond crystallography of membrane and soluble protein microcrystals using synchrotron radiation
|
journal | May 2017 |
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