Proteasome dysfunction aging refers to reduced efficiency of the ubiquitin–proteasome system responsible for degrading damaged or unnecessary proteins. Aging proteasomes show decreased catalytic activity and substrate recognition. This leads to accumulation of misfolded and oxidized proteins that interfere with cellular function. Proteasome dysfunction aging contributes to proteostasis imbalance and cellular stress. It affects signaling pathways, metabolism, and stress tolerance. Impaired proteasome function is strongly linked to neurodegeneration and muscle aging. Understanding proteasome dysfunction aging highlights importance of protein clearance systems in maintaining cellular integrity and healthspan.
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