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Updated: Dec 28, 2025

Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus
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RNA Droplets.

Kevin Rhine1, Velinda Vidaurre1, Sua Myong2,3

  • 1Department of Biology, Johns Hopkins University, Baltimore, Maryland 21218, USA.

Annual Review of Biophysics
|February 11, 2020
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Summary
This summary is machine-generated.

RNA plays a critical role in forming membraneless cellular granules through liquid-liquid phase separation. This review explores RNA

Keywords:
RNARNA binding proteinaberrant aggregationliquid–liquid phase separationmultivalencypolymer

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Area of Science:

  • Biochemistry and Molecular Biology
  • Cell Biology
  • Biophysics

Background:

  • Membraneless cellular granules form via liquid-liquid phase separation (LLPS).
  • Intrinsically disordered proteins and low complexity domains are well-studied in LLPS.
  • The role of RNA, a key component of ribonucleoprotein (RNP) granules, remains less understood.

Purpose of the Study:

  • To review the multifaceted roles of RNA in the formation and function of RNP granules.
  • To highlight RNA's influence on the biophysical properties of condensates.
  • To emphasize RNA's function in defining condensate identity and regulating RNP granule localization.

Main Methods:

  • Review of in vitro studies on RNA-mediated phase separation.
  • Analysis of in vivo experimental findings on RNP granule dynamics.
  • Synthesis of current literature on RNA's impact on condensate properties.

Main Results:

  • RNA acts as a crucial scaffold, enabling multivalency for RNA-binding proteins.
  • RNA modulates phase-separation propensity, altering droplet viscoelasticity and immiscibility.
  • RNA is essential for the specific identity and spatiotemporal control of RNP granules.

Conclusions:

  • RNA is a fundamental determinant of RNP granule formation, properties, and function.
  • Understanding RNA's role in LLPS is key to deciphering cellular condensate biology.
  • Further research into RNA's biophysical and functional contributions is warranted.