Pseudouridylation of tRNA-Derived Fragments Steers Translational Control in Stem Cells

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Pseudouridylation (Ψ) is the most abundant and widespread type of RNA epigenetic modification in living organisms; however, the biological role of Ψ remains poorly understood. Here, we show that a Ψ-driven posttranscriptional program steers translation control to impact stem cell commitment during early embryogenesis. Mechanistically, the Ψ “writer” PUS7 modifies and activates a novel network of tRNA-derived small fragments (tRFs) targeting the translation initiation complex. PUS7 inactivation in embryonic stem cells impairs tRF-mediated translation regulation, leading to increased protein biosynthesis and defective germ layer specification. Remarkably, dysregulation of this posttranscriptional regulatory circuitry impairs hematopoietic stem cell commitment and is common to aggressive subtypes of human myelodysplastic syndromes. Our findings unveil a critical function of Ψ in directing translation control in stem cells with important implications for development and disease. Translational control in stem cells is orchestrated by pseudouridylation of specific tRNA-derived fragments, impacting stem cell commitment during key developmental processes.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • University of Washington
  • Karolinska Institute
  • University of Copenhagen
  • Linköping University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Cell- och molekylärbiologi

Nyckelord

Originalspråkengelska
Sidor (från-till)1204-1216.e26
TidskriftCell
Volym173
Utgåva nummer5
Tidigt onlinedatum2018 apr 5
StatusPublished - 2018
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Nicola Guzzi, 2020, Lund: Lund University, Faculty of Medicine. 78 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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