Eukaryotic mRNA decapping

Jeff Coller, Roy Parker

Research output: Contribution to journalReview articlepeer-review

383 Scopus citations


Eukaryotic mRNAs are primarily degraded by removal of the 3′ poly (A) tail, followed either by cleavage of the 5′ cap structure (decapping) and 5′->3′ exonucleolytic digestion, or by 3′ to 5′ degradation. mRNA decapping represents a critical step in turnover because this permits the degradation of the mRNA and is a site of numerous control inputs. Recent analyses suggest decapping of an mRNA consists of four central and related events. These include removal, or inactivation, of the poly(A) tail as an inhibitor of decapping, exit from active translation, assembly of a decapping complex on the mRNA, and sequestration of the mRNA into discrete cytoplasmic foci where decapping can occur. Each of these steps is a demonstrated, or potential, site for the regulation of mRNA decay. We discuss the decapping process in the light of these central properties, which also suggest fundamental aspects of cytoplasmic mRNA physiology that connect decapping, translation, and storage of mRNA.

Original languageEnglish (US)
Pages (from-to)861-890
Number of pages30
JournalAnnual review of biochemistry
StatePublished - 2004
Externally publishedYes


  • mRNA decay deadenylation
  • mRNA stability
  • mRNA turnover

ASJC Scopus subject areas

  • Biochemistry


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