Translational regulation of the cell cycle: when, where, how and why?

Philos Trans R Soc Lond B Biol Sci. 2011 Dec 27;366(1584):3638-52. doi: 10.1098/rstb.2011.0084.

Abstract

Translational regulation contributes to the control of archetypal and specialized cell cycles, such as the meiotic and early embryonic cycles. Late meiosis and early embryogenesis unfold in the absence of transcription, so they particularly rely on translational repression and activation of stored maternal mRNAs. Here, we present examples of cell cycle regulators that are translationally controlled during different cell cycle and developmental transitions in model organisms ranging from yeast to mouse. Our focus also is on the RNA-binding proteins that affect cell cycle progression by recognizing special features in untranslated regions of mRNAs. Recent research highlights the significance of the cytoplasmic polyadenylation element-binding protein (CPEB). CPEB determines polyadenylation status, and consequently translational efficiency, of its target mRNAs in both transcriptionally active somatic cells as well as in transcriptionally silent mature Xenopus oocytes and early embryos. We discuss the role of CPEB in mediating the translational timing and in some cases spindle-localized translation of critical regulators of Xenopus oogenesis and early embryogenesis. We conclude by outlining potential directions and approaches that may provide further insights into the translational control of the cell cycle.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Cell Cycle*
  • Cyclin B / chemistry
  • Embryonic Development
  • Male
  • Meiosis
  • Mitosis
  • Oocytes / chemistry
  • Oocytes / growth & development
  • Polyadenylation
  • Protein Biosynthesis*
  • RNA-Binding Proteins / chemistry
  • Repressor Proteins / chemistry
  • Spermatocytes / chemistry
  • Spermatocytes / growth & development
  • Transcription Factors / chemistry
  • Xenopus / embryology
  • Xenopus / growth & development
  • Xenopus Proteins / chemistry
  • mRNA Cleavage and Polyadenylation Factors / chemistry

Substances

  • Cpeb1 protein, Xenopus
  • Cyclin B
  • RNA-Binding Proteins
  • Repressor Proteins
  • Transcription Factors
  • Xenopus Proteins
  • mRNA Cleavage and Polyadenylation Factors