Interplay of Proteostasis Capacity and Protein Aggregation: Implications for Cellular Function and Disease

Mark S. Hipp*, F. Ulrich Hartl*

*Corresponding author voor dit werk

Onderzoeksoutputpeer review

10 Citaten (Scopus)
19 Downloads (Pure)

Samenvatting

Eukaryotic cells are equipped with an intricate proteostasis network (PN), comprising nearly 3,000 components dedicated to preserving proteome integrity and sustaining protein homeostasis. This protective system is particularly important under conditions of external and intrinsic cell stress, where inherently dynamic proteins may unfold and lose functionality. A decline in proteostasis capacity is associated with the aging process, resulting in a reduced folding efficiency of newly synthesized proteins and a deficit in the cellular capacity to degrade misfolded proteins. A critical consequence of PN insufficiency is the accumulation of cytotoxic protein aggregates that underlie various age-related neurodegenerative conditions and other pathologies. By interfering with specific proteostasis components, toxic aggregates place an excessive burden on the PN's ability to maintain proteome integrity. This initiates a feed-forward loop, wherein the generation of misfolded and aggregated proteins ultimately leads to proteostasis collapse and cellular demise.

Originele taal-2English
Artikelnummer168615
Aantal pagina's18
TijdschriftJournal of Molecular Biology
Volume436
Nummer van het tijdschrift14
DOI's
StatusPublished - 15-jul.-2024

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