Related Experiment Video

Updated: Aug 9, 2025

Using SecM Arrest Sequence as a Tool to Isolate Ribosome Bound Polypeptides
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Using SecM Arrest Sequence as a Tool to Isolate Ribosome Bound Polypeptides

Published on: June 19, 2012

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Co-Translational Quality Control Induced by Translational Arrest

Yoshitaka Matsuo1, Toshifumi Inada1

  • 1Division of RNA and Gene regulation, Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan.

Biomolecules
|February 25, 2023
PubMed

Insights

Cellular surveillance systems prevent harmful protein buildup by eliminating incomplete chains from stalled ribosomes. Yeast studies reveal the molecular mechanisms of this co-translational quality control, maintaining protein homeostasis.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Genetics

Background:

  • Translating ribosomes can stall due to genetic mutations, mRNA errors, or tRNA issues.
  • Stalled ribosomes produce incomplete nascent chains that may aggregate and become toxic.
  • Cellular surveillance mechanisms are crucial for detecting and eliminating aberrant translation products.

Purpose of the Study:

  • To summarize the current understanding of co-translational quality control mechanisms in yeast.
  • To elucidate how yeast cells eliminate harmful products from aberrant translation.
  • To highlight the role of these systems in maintaining cellular protein homeostasis.

Main Methods:

  • Utilizing yeast as a model organism.
  • Employing powerful genetic techniques.
  • Applying biochemical assays to study translation and quality control.

Main Results:

  • Detailed mechanisms for identifying and eliminating incomplete nascent chains.
  • Identification of pathways for removing aberrant mRNAs and faulty ribosomes.
  • Demonstration of the efficiency of yeast co-translational quality control systems.

Conclusions:

  • Yeast co-translational quality control is essential for preventing the accumulation of toxic protein species.
  • These systems ensure the fidelity of protein synthesis and cellular health.
  • Understanding these mechanisms in yeast provides insights into fundamental cellular processes.
Keywords:
mRNA decaynon-canonical ribosome dissociationprotein degradationquality controlribosome collisiontransrational arrestubiquitination

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