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Expanding the Riboglow-FLIM Toolbox with Different Fluorescence Lifetime-Producing RNA Tags.

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Summary
This summary is machine-generated.

Researchers expanded the Riboglow-FLIM platform by developing nine new RNA tags. This advancement enables simultaneous tracking of multiple RNAs in live cells using fluorescence lifetime imaging microscopy (FLIM).

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biophysics

Background:

  • Subcellular localization of RNAs is crucial for their biological functions.
  • Genetically encoded RNA tags coupled with fluorescent probes allow visualization of RNA dynamics.
  • The Riboglow-FLIM platform previously demonstrated proof-of-concept for RNA tagging and fluorescence lifetime measurement.

Purpose of the Study:

  • To systematically expand the RNA tag sequence space for the Riboglow-FLIM platform.
  • To evaluate the multiplexing capabilities of different riboswitch-derived RNA sequences.
  • To establish a foundation for simultaneous tracking of multiple RNAs in live cells.

Main Methods:

  • Evaluation of diverse RNA sequences *in vitro* to expand the Riboglow-FLIM tag library.
  • Utilized a literature-guided approach, including phylogenetic analysis of riboswitch-derived tags.
  • Employed a rational design approach based on established Riboglow RNA tags to create new variants.

Main Results:

  • Characterized nine distinct RNA tags, demonstrating a wide range of fluorescence lifetimes.
  • Confirmed the potential for multiplexing by observing unique fluorescence lifetime signatures for each tag.
  • Established the foundation for differentiating and tracking multiple RNA molecules concurrently.

Conclusions:

  • The developed RNA tags significantly enhance the multiplexing capacity of the Riboglow-FLIM platform.
  • This work provides a robust toolkit for simultaneous RNA imaging in live biological systems.
  • The findings pave the way for advanced studies on RNA spatiotemporal dynamics and function.