Nuclear fate of yeast snoRNA is determined by co-transcriptional Rnt1 cleavage

Research output: Contribution to journalArticlepeer-review

Authors

  • Sylwia A Szczepaniak
  • Somdutta Dhir
  • Anna Pastucha
  • Hannah Parslow
  • Zaneta Matuszek
  • Hannah E Mischo
  • Joanna Kufel
  • Nicholas J Proudfoot

Colleges, School and Institutes

External organisations

  • College of Inter-Faculty Individual Studies in Mathematics and Natural Sciences, University of Warsaw, 02-089, Warsaw, Poland.
  • University of Oxford
  • Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland.
  • School of Biosciences, University of Birmingham
  • Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Pawinskiego 5a, 02-106, Warsaw, Poland. kufel@ibb.waw.pl.

Abstract

Small nucleolar RNA (snoRNA) are conserved and essential non-coding RNA that are transcribed by RNA Polymerase II (Pol II). Two snoRNA classes, formerly distinguished by their structure and ribonucleoprotein composition, act as guide RNA to target RNA such as ribosomal RNA, and thereby introduce specific modifications. We have studied the 5'end processing of individually transcribed snoRNA in S. cerevisiae to define their role in snoRNA biogenesis and functionality. Here we show that pre-snoRNA processing by the endonuclease Rnt1 occurs co-transcriptionally with removal of the m7G cap facilitating the formation of box C/D snoRNA. Failure of this process causes aberrant 3'end processing and mislocalization of snoRNA to the cytoplasm. Consequently, Rnt1-dependent 5'end processing of box C/D snoRNA is critical for snoRNA-dependent methylation of ribosomal RNA. Our results reveal that the 5'end processing of box C/D snoRNA defines their distinct pathway of maturation.

Details

Original languageEnglish
Article number1783
JournalNature Communications
Volume9
Publication statusPublished - 3 May 2018

Keywords

  • RNA, RNA metabolism