The Role of the Proteasome in Limiting Cellular Stress Associated with Protein Accumulation
Kate A. Kragness,
Darci J. Trader
Abstract:The proteasome is comprised of multiple subunits that catalyze the degradation of proteins to maintain cellular homeostasis. The proteasome targets protein substrates by two different pathways. The ubiquitin‐dependent pathway requires proteins to be labeled with a ubiquitin tag to signal for degradation by the 26S isoform of the proteasome. Protein degradation through this pathway declines during age progression. The ubiquitin‐independent pathway utilizes the 20S proteasome isoform. It can degrade misfolded an… Show more
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