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Monitoring eIF4F Assembly by Measuring eIF4E-eIF4G Interaction in Live Cells
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A Cap for Every Occasion: Alternative eIF4F Complexes.

J J David Ho1, Stephen Lee1

  • 1Department of Biochemistry and Molecular Biology, Miller School of Medicine, University of Miami, Miami, FL 31336, USA; Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 31336, USA.

Trends in Biochemical Sciences
|June 11, 2016
PubMed
Summary
This summary is machine-generated.

Cells assemble variants of the eukaryotic translation initiation factor 4F (eIF4F) to adapt mRNA translation during inhibition. This challenges traditional views of cellular translational control pathways.

Keywords:
eIF4EeIF4E2eIF4FeIF4G3hypoxiatranslation

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Genetics

Background:

  • The eukaryotic translation initiation factor 4F (eIF4F) complex is traditionally viewed as central to 5' cap-dependent mRNA translation.
  • Its role is considered essential for initiating protein synthesis in eukaryotic cells.

Purpose of the Study:

  • To investigate the dynamic assembly of eIF4F variants.
  • To understand how cells adapt cap-dependent translation under inhibitory conditions.
  • To challenge and refine classical models of translational regulation.

Main Methods:

  • Analysis of eIF4F complex composition under various physiological states.
  • Assessment of mRNA translation rates and specific mRNA populations.
  • Investigating the functional consequences of eIF4F variant assembly.

Main Results:

  • Cells actively assemble distinct variants of eIF4F.
  • These eIF4F variants enable the production of specific translatomes.
  • Adaptive translation occurs even when canonical eIF4F function is inhibited.

Conclusions:

  • Cellular translational control is more adaptable than previously thought.
  • eIF4F variants play a key role in generating adaptive cap-dependent translatomes.
  • Classical models of mRNA translation require reassessment in light of these findings.