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Split Luciferase-Fragment Reconstitution for Unveiling RNA Localization and Dynamics in Live Cells.

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Summary

Researchers developed a novel bioluminescent RNA probe for real-time monitoring of RNA dynamics in living cells. This tool enables visualization of RNA localization and quantity changes, advancing cellular event studies.

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RNA probebioluminescence imagingbioluminescent proteinluciferase-fragment reconstitution

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Intracellular RNA distribution and dynamics are crucial for physiological processes.
  • Monitoring endogenous RNA amount and localization in living cells is key to understanding cellular events.
  • Current fluorescent probes face limitations in continuously tracking temporal RNA changes.

Purpose of the Study:

  • To develop a bioluminescent probe for spatiotemporal monitoring of RNAs in living cells.
  • To enable real-time visualization of RNA dynamics, localization, and quantity.
  • To overcome limitations of existing RNA tracking methods.

Main Methods:

  • Utilized a split-luciferase reconstitution technique with NanoLuc fragments.
  • Engineered RNA-binding protein domains from a PUM-HD mutation.
  • Validated probe performance in vitro and in live-cell imaging experiments.

Main Results:

  • The bioluminescent probe exhibited rapid luminescence changes correlating with target RNA amount variations in vitro.
  • Successfully visualized temporal changes in endogenous β-actin mRNA distribution in response to stimulation.
  • Demonstrated visualization of specific β-actin mRNA localization in primary hippocampal neurons.

Conclusions:

  • The developed bioluminescent RNA probe enables effective spatiotemporal monitoring of target RNA.
  • The probe allows visualization of changes in RNA localization, dynamics, and quantity in living cells.
  • This technology offers a new tool for studying RNA biology in various cellular contexts.