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Updated: May 15, 2026
09:18
Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans
Published on: September 7, 2021
Protein homeostasis: live long, won't prosper
Brandon H Toyama1, Martin W Hetzer
1Salk Institute for Biological Studies, Molecular and Cell Biology Laboratory, 10010 North Torrey Pines Road, La Jolla, California 92037, USA.
Nature Reviews. Molecular Cell Biology
|December 22, 2012
Summary
Cellular protein turnover maintains proteome function by replacing old proteins. However, some long-lived proteins evade this process, potentially accumulating damage and contributing to aging.
Area of Science:
- Cellular Biology
- Molecular Biology
- Aging Research
Background:
- Protein turnover is essential for maintaining a functional proteome.
- Damaged polypeptides are typically destroyed and replaced by newly synthesized ones.
- Some intracellular proteins resist this degradation and persist throughout a cell's life.
Purpose of the Study:
- To investigate the implications of long-lived proteins that evade cellular turnover.
- To explore the potential role of these proteins in age-related functional decline.
Main Methods:
- Analysis of protein stability and degradation pathways.
- Identification of intracellular proteins with extended half-lives.
- Correlation of long-lived protein abundance with cellular damage markers.
Main Results:
- A subset of intracellular proteins was identified that bypass normal turnover mechanisms.
- These long-lived proteins are potentially more susceptible to accumulating molecular damage.
- Evidence suggests a link between persistent proteins and the deterioration of regulatory processes during aging.
Conclusions:
- Long-lived proteins that escape proteome turnover represent a potential source of age-related cellular dysfunction.
- Understanding these proteins is crucial for comprehending the aging process and developing interventions.
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