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Fast Ion-Beam Inactivation of Viruses, Where Radiation Track Structure Meets RNA Structural Biology.

B Villagomez-Bernabe1, S W Chan2, J A Coulter3

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Understanding the interplay between ionization tracks and RNA structure is key for predicting virus inactivation by ion beams. This research links RNA tertiary structure determination to virus inactivation, with ion beams aiding both.

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Area of Science:

  • Structural biology
  • Radiation biology
  • Virology

Background:

  • Predicting virus inactivation by high-energy ion beams requires understanding radiation interactions with virion components.
  • Current models may not fully capture the complexity of these interactions, especially concerning RNA structure.

Purpose of the Study:

  • To investigate the interplay between ionization track structures and nucleocapsid RNA structural biology.
  • To explore the prediction of dose-inactivation curves for high-energy ion-beam inactivation of virions.
  • To adapt radiation interaction data for virion components beyond existing approximations.

Main Methods:

  • Utilizing fast ion-beam inactivation of severe acute respiratory syndrome coronavirus (SARS-CoV) virions as a model system.
  • Adapting cross-section data from radiation interactions with water for virion components.
  • Employing simulations to analyze the role of ion beams in RNA structure elucidation.

Main Results:

  • Demonstrated a significant interplay between ionization track structures and RNA structural biology.
  • Showed that this interplay is crucial for predicting dose-inactivation curves in ion-beam inactivation.
  • Validated the adaptation of radiation interaction data for virion components, improving upon previous approximations.

Conclusions:

  • The determination of RNA tertiary/quaternary structure is intrinsically linked to predicting ion-beam inactivation of viruses.
  • Fast ion beams can serve as a tool to elucidate complex RNA structures.
  • The two fields of RNA structural biology and virus inactivation can mutually inform each other.