mTOR-sensitive translation: Cleared fog reveals more trees

Laia Masvidal, Laura Hulea, Luc Furic, Ivan Topisirovic, Ola Larsson

Research output: Contribution to journalReview ArticleResearchpeer-review

26 Citations (Scopus)

Abstract

Translation is fundamental for many biologic processes as it enables cells to rapidly respond to stimuli without requiring de novo mRNA synthesis. The mammalian/mechanistic target of rapamycin (mTOR) is a key regulator of translation. Although mTOR affects global protein synthesis, translation of a subset of mRNAs appears to be exceptionally sensitive to changes in mTOR activity. Recent efforts to catalog these mTOR-sensitive mRNAs resulted in conflicting results. Whereas ribosome-profiling almost exclusively identified 5′-terminal oligopyrimidine (TOP) mRNAs as mTOR-sensitive, polysome-profiling suggested that mTOR also regulates translation of non-TOP mRNAs. This inconsistency was explained by analytical and technical biases limiting the efficiency of ribosome-profiling in detecting mRNAs showing differential translation. Moreover, genome-wide characterization of 5′UTRs of non-TOP mTOR-sensitive mRNAs revealed 2 subsets of transcripts which differ in their requirement for translation initiation factors and biologic functions. We summarize these recent advances and their impact on the understanding of mTOR-sensitive translation.
Original languageEnglish
Pages (from-to)1299-1305
Number of pages7
JournalRNA Biology
Volume14
Issue number10
DOIs
Publication statusPublished - 3 Oct 2017

Keywords

  • eIFs
  • mRNA translation
  • mTOR
  • nanoCAGE
  • polysome profiling
  • ribosome profiling
  • UTR

Cite this

Masvidal, L., Hulea, L., Furic, L., Topisirovic, I., & Larsson, O. (2017). mTOR-sensitive translation: Cleared fog reveals more trees. RNA Biology, 14(10), 1299-1305. https://doi.org/10.1080/15476286.2017.1290041