Reverse genetics-based biochemical studies of the ribosomal exit tunnel constriction region in eukaryotic ribosome stalling: spatial allocation of the regulatory nascent peptide at the constriction.

ABSTRACT: A number of regulatory nascent peptides have been shown to regulate gene expression by causing programmed ribosome stalling during translation. Nascent peptide emerges from the ribosome through the exit tunnel, and one-third of the way along which β-loop structures of ribosomal proteins uL4 and uL22 protrude into the tunnel to form the constriction region. Structural studies have shown interactions between nascent peptides and the exit tunnel components including the constriction region. In eukaryotes, however, there is a lack of genetic studies for the involvement of the constriction region in ribosome stalling. Here, we established transgenic Arabidopsis lines that carry mutations in the β-loop structure of uL4. Translation analyses using a cell-free translation system derived from the t

SUBMITTER: Takamatsu S 

PROVIDER: S-EPMC7038982 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature