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Methods to Classify Cytoplasmic Foci as Mammalian Stress Granules
Published on: May 12, 2017
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PRRC2A, PRRC2B and PRRC2C are Stress Granule Proteins that Promote Translation Through Association with the eIF3
Biorxiv : the Preprint Server for Biology
|March 11, 2026
Summary
Proline-Rich Coiled-Coil (PRRC2) proteins regulate mRNA translation by interacting with the 48S translation initiation complex. These stress granule components are essential for cell growth and proteome abundance.
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- mRNA translation regulation is crucial for cellular health.
- Dysregulation of translation is linked to diseases like cancer and neurodegeneration.
- Stress granules, involved in translation arrest, contain poorly understood modulators.
Purpose of the Study:
- Identify novel stress granule proteins that regulate mRNA translation.
- Elucidate the mechanism by which these proteins control translation.
- Establish a link between stress granules and translational control.
Main Methods:
- Functional proteomics to identify protein interactions.
- Genetic perturbation to assess protein function.
- AlphaFold3 modeling for structural insights.
- Cryo-electron microscopy data analysis.
Main Results:
- PRRC2 proteins (A, B, and C) associate with the 48S translation initiation complex (PIC).
- PRRC2 proteins are essential for cell growth and proteome stability.
- PRRC2C interacts with the eIF3 core complex, mediating translation control.
- PRRC2 proteins influence stress granule assembly and remodeling.
Conclusions:
- PRRC2 proteins are key regulators of translation initiation.
- They act as a mechanistic link between stress granules and translational control.
- PRRC2 proteins are essential components of the cellular machinery governing protein synthesis.
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