The RNA helicase Dbp7 promotes domain V/VI compaction and stabilization of inter-domain interactions during early 60S assembly

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

  • Gerald Ryan R. Aquino
  • Philipp Hackert
  • Krogh, Nicolai
  • Kuan Ting Pan
  • Mariam Jaafar
  • Anthony K. Henras
  • Nielsen, Henrik
  • Henning Urlaub
  • Katherine E. Bohnsack
  • Markus T. Bohnsack

Early pre-60S ribosomal particles are poorly characterized, highly dynamic complexes that undergo extensive rRNA folding and compaction concomitant with assembly of ribosomal proteins and exchange of assembly factors. Pre-60S particles contain numerous RNA helicases, which are likely regulators of accurate and efficient formation of appropriate rRNA structures. Here we reveal binding of the RNA helicase Dbp7 to domain V/VI of early pre-60S particles in yeast and show that in the absence of this protein, dissociation of the Npa1 scaffolding complex, release of the snR190 folding chaperone, recruitment of the A3 cluster factors and binding of the ribosomal protein uL3 are impaired. uL3 is critical for formation of the peptidyltransferase center (PTC) and is responsible for stabilizing interactions between the 5′ and 3′ ends of the 25S, an essential pre-requisite for subsequent pre-60S maturation events. Highlighting the importance of pre-ribosome remodeling by Dbp7, our data suggest that in the absence of Dbp7 or its catalytic activity, early pre-ribosomal particles are targeted for degradation.

OriginalsprogEngelsk
Artikelnummer6152
TidsskriftNature Communications
Vol/bind12
ISSN2041-1723
DOI
StatusUdgivet - 2021

Bibliografisk note

Funding Information:
This work was supported by the Deutsche Forschungsgemeinschaft (SFB860 to M.T.B. and SFB1190 to K.E.B.), the EU COST Action CA16120 (STSM41493 to G.R.R.A and M.T.B.) and the University Medical Centre Göttingen (to M.T.B. and K.E.B.). We thank Lukas Brüning, Roman Martin, Jens Kretschmer, and Nicolas Lemus-Diaz for help with bioinformatics analysis of PAR-CRAC data, Ákos Farkas for help with microscopy and Maral Halladjian for assisting with pseudouridine analyses.

Publisher Copyright:
© 2021, The Author(s).

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