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Updated: Jun 7, 2025
09:42
Using SecM Arrest Sequence as a Tool to Isolate Ribosome Bound Polypeptides
Published on: June 19, 2012
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STALL-seq: mRNA-display selection of bacterial and eukaryotic translational arrest sequences from large
Tadashi Hamano1, Yu Nagumo1, Tomofumi Umehara1
1Department of Biosciences and Informatics, Keio University, Yokohama, Japan.
The Journal of Biological Chemistry
|November 14, 2024
Summary
Researchers developed STALL-seq, a method to discover novel translational arrest peptides. This technique uses mRNA display and deep sequencing to identify sequences that pause ribosome activity, aiding in understanding protein homeostasis and gene regulation.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Translational arrest involves temporary pauses in protein synthesis due to ribosome-nascent peptide interactions.
- Translational arrest peptides regulate protein homeostasis, gene expression, and cotranslational protein folding.
Purpose of the Study:
- To establish a method for large-scale in vitro selection of translational arrest peptides.
- To discover novel arrest peptides and their regulatory functions.
Main Methods:
- Utilized a modified mRNA display method combined with deep sequencing (STALL-seq).
- Performed in vitro selection using Escherichia coli PURE system and wheat germ extract.
- Confirmed ribosome stalling activity via peptidyl-tRNA detection and toeprinting assays.
Main Results:
- Identified novel candidate sequences dissimilar to known arrest peptides.
- Confirmed ribosome stalling activity of selected sequences.
- Discovered new arrest peptide motifs through site-directed mutagenesis.
Conclusions:
- The STALL-seq method enables large-scale discovery of translational arrest sequences.
- This approach is applicable to both bacterial and eukaryotic ribosomes.
- Facilitates the investigation of novel intracellular regulatory mechanisms.
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