A role for DIS3L2 over natural nonsense-mediated mRNA decay targets in human cells

Paulo J. da Costa, Juliane Menezes, Margarida Saramago, Juan F. García-Moreno, Hugo A. Santos, Margarida Gama-Carvalho, Cecília M. Arraiano, Sandra C. Viegas, Luísa Romão

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Abstract

The nonsense-mediated decay (NMD) pathway selectively degrades mRNAs carrying a premature translation-termination codon but also regulates the abundance of a large number of physiological mRNAs that encode full-length proteins. In human cells, NMD-targeted mRNAs are degraded by endonucleolytic cleavage and exonucleolytic degradation from both 5-’ and 3′-ends. This is done by a process not yet completely understood that recruits decapping and 5′-to-3′ exonuclease activities, as well as deadenylating and 3′-to-5′ exonuclease exosome activities. In yeast, DIS3/Rrp44 protein is the catalytic subunit of the exosome, but in humans, there are three known paralogues of this enzyme: DIS3, DIS3L1, and DIS3L2. However, little is known about their role in NMD. Here, we show that some NMD-targets are DIS3L2 substrates in human cells. In addition, we observed that DIS3L2 acts over full-length transcripts, through a process that also involves UPF1. Moreover, DIS3L2-mediated decay is dependent on the activity of the terminal uridylyl transferases Zcchc6/11 (TUT7/4). Together, our findings establish a role for DIS3L2 and uridylation in NMD.

Original languageEnglish
Pages (from-to)664-671
Number of pages8
JournalBiochemical And Biophysical Research Communications
Volume518
Issue number4
DOIs
Publication statusPublished - 22 Oct 2019

Keywords

  • DIS3L2
  • mRNA turnover
  • NMD
  • Nonsense-mediated mRNA decay
  • Terminal uridylyl transferases Zcchc6/11 (TUT7/4)

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    da Costa, P. J., Menezes, J., Saramago, M., García-Moreno, J. F., Santos, H. A., Gama-Carvalho, M., ... Romão, L. (2019). A role for DIS3L2 over natural nonsense-mediated mRNA decay targets in human cells. Biochemical And Biophysical Research Communications, 518(4), 664-671. https://doi.org/10.1016/j.bbrc.2019.08.105