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Rrp5p, Noc1p and Noc2p form a protein module which is part of early large ribosomal subunit precursors in S. cerevisiae

Eukaryotic ribosome biogenesis requires more than 150 auxiliary proteins, which transiently interact with pre-ribosomal particles. Previous studies suggest that several of these biogenesis factors function together as modules. Using a heterologous expression system, we show that the large ribosomal...

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Main Authors: Hierlmeier, Thomas (Author) , Merl, Juliane (Author) , Sauert, Martina (Author) , Perez-Fernandez, Jorge (Author) , Schultz, Patrick (Author) , Bruckmann, Astrid (Author) , Hamperl, Stephan (Author) , Ohmayer, Uli (Author) , Rachel, Reinhard (Author) , Jacob, Anja (Author) , Hergert, Kristin (Author) , Deutzmann, Rainer (Author) , Griesenbeck, Joachim (Author) , Hurt, Ed (Author) , Milkereit, Philipp (Author) , Baßler, Jochen (Author) , Tschochner, Herbert (Author)
Format: Article (Journal)
Language:English
Published: 2013
In: Nucleic acids research
Year: 2012, Volume: 41, Issue: 2, Pages: 1191-1210
ISSN:1362-4962
DOI:10.1093/nar/gks1056
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/nar/gks1056
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Author Notes:Thomas Hierlmeier, Juliane Merl, Martina Sauert, Jorge Perez-Fernandez, Patrick Schultz, Astrid Bruckmann, Stephan Hamperl, Uli Ohmayer, Reinhard Rachel, Anja Jacob, Kristin Hergert, Rainer Deutzmann, Joachim Griesenbeck, Ed Hurt, Philipp Milkereit, Jochen Baßler and Herbert Tschochner
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Summary:Eukaryotic ribosome biogenesis requires more than 150 auxiliary proteins, which transiently interact with pre-ribosomal particles. Previous studies suggest that several of these biogenesis factors function together as modules. Using a heterologous expression system, we show that the large ribosomal subunit (LSU) biogenesis factor Noc1p of Saccharomyces cerevisiae can simultaneously interact with the LSU biogenesis factor Noc2p and Rrp5p, a factor required for biogenesis of the large and the small ribosomal subunit. Proteome analysis of RNA polymerase-I-associated chromatin and chromatin immunopurification experiments indicated that all members of this protein module and a specific set of LSU biogenesis factors are co-transcriptionally recruited to nascent ribosomal RNA (rRNA) precursors in yeast cells. Further ex vivo analyses showed that all module members predominantly interact with early pre-LSU particles after the initial pre-rRNA processing events have occurred. In yeast strains depleted of Noc1p, Noc2p or Rrp5p, levels of the major LSU pre-rRNAs decreased and the respective other module members were associated with accumulating aberrant rRNA fragments. Therefore, we conclude that the module exhibits several binding interfaces with pre-ribosomes. Taken together, our results suggest a co- and post-transcriptional role of the yeast Rrp5p-Noc1p-Noc2p module in the structural organization of early LSU precursors protecting them from non-productive RNase activity.
Item Description:Gesehen am 10.05.2021
Published: 02 December 2012
Physical Description:Online Resource
ISSN:1362-4962
DOI:10.1093/nar/gks1056

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