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Co-translational capturing of nascent ribosomal proteins by their dedicated chaperones

Exponentially growing yeast cells produce every minute >160,000 ribosomal proteins. Owing to their difficult physicochemical properties, the synthesis of assembly-competent ribosomal proteins represents a major challenge. Recent evidence highlights that dedicated chaperone proteins recognize the...

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Main Authors: Pausch, Patrick (Author) , Singh, Ujjwala (Author) , Ahmed, Yasar Luqman (Author) , Pillet, Benjamin (Author) , Murat, Guillaume (Author) , Altegoer, Florian (Author) , Stier, Gunter (Author) , Thoms, Matthias (Author) , Hurt, Ed (Author) , Sinning, Irmgard (Author) , Bange, Gert (Author) , Kressler, Dieter (Author)
Format: Article (Journal)
Language:English
Published: 26 Jun 2015
In: Nature Communications
Year: 2015, Volume: 6
ISSN:2041-1723
DOI:10.1038/ncomms8494
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/ncomms8494
Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/ncomms8494
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Author Notes:Patrick Pausch, Ujjwala Singh, Yasar Luqman Ahmed, Benjamin Pillet, Guillaume Murat, Florian Altegoer, Gunter Stier, Matthias Thoms, Ed Hurt, Irmgard Sinning, Gert Bange & Dieter Kressler
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Summary:Exponentially growing yeast cells produce every minute >160,000 ribosomal proteins. Owing to their difficult physicochemical properties, the synthesis of assembly-competent ribosomal proteins represents a major challenge. Recent evidence highlights that dedicated chaperone proteins recognize the N-terminal regions of ribosomal proteins and promote their soluble expression and delivery to the assembly site. Here we explore the intuitive possibility that ribosomal proteins are captured by dedicated chaperones in a co-translational manner. Affinity purification of four chaperones (Rrb1, Syo1, Sqt1 and Yar1) selectively enriched the mRNAs encoding their specific ribosomal protein clients (Rpl3, Rpl5, Rpl10 and Rps3). X-ray crystallography reveals how the N-terminal, rRNA-binding residues of Rpl10 are shielded by Sqt1’s WD-repeat β-propeller, providing mechanistic insight into the incorporation of Rpl10 into pre-60S subunits. Co-translational capturing of nascent ribosomal proteins by dedicated chaperones constitutes an elegant mechanism to prevent unspecific interactions and aggregation of ribosomal proteins on their road to incorporation.
Item Description:Gesehen am 01.07.2020
Physical Description:Online Resource
ISSN:2041-1723
DOI:10.1038/ncomms8494

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