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Eukaryotic mRNA decapping

Jeff Coller1, Roy Parker

  • 1Howard Hughes Medical Institute, Department of Molecular and Cellular Biology, University of Arizona, Tucson, Arizona 85721, USA. jmcoller@u.arizona.edu

Annual Review of Biochemistry
|June 11, 2004
PubMed

Insights

Eukaryotic messenger RNA (mRNA) degradation involves decapping, a key step regulated by poly(A) tail removal and translation exit. This process occurs in cytoplasmic foci, influencing mRNA turnover, translation, and storage.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Eukaryotic mRNA degradation is crucial for gene expression regulation.
  • mRNA decay primarily occurs via deadenylation followed by decapping or 3' to 5' degradation.
  • Decapping is a critical control point in mRNA turnover.

Purpose of the Study:

  • To elucidate the central events and regulatory mechanisms of eukaryotic mRNA decapping.
  • To connect mRNA decapping with translation and cytoplasmic mRNA storage.
  • To provide a comprehensive overview of mRNA decay pathways.

Main Methods:

  • Literature review and synthesis of recent analyses on mRNA decapping.
  • Analysis of regulatory inputs at different stages of the decapping process.
  • Discussion of the interplay between decapping, translation, and mRNA localization.

Main Results:

  • mRNA decapping involves four key events: poly(A) tail inactivation, exit from translation, decapping complex assembly, and sequestration into cytoplasmic foci.
  • Each of these events represents a potential site for regulating mRNA decay.
  • These processes are intrinsically linked to mRNA translation and storage.

Conclusions:

  • Decapping is a highly regulated step central to mRNA turnover in eukaryotes.
  • Understanding decapping provides insights into the dynamic regulation of gene expression.
  • The interplay between decapping, translation, and mRNA storage is fundamental to cytoplasmic mRNA physiology.

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