Cited by 932Heat shock proteins researchAutophagy in Disease and TherapyGenetic Neurodegenerative Diseases

Misfolded proteins partition between two distinct quality control compartments

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Kaganovich, Daniel, Kopito, Ron, Frydman, Judith·2008·Nature

Abstract

The accumulation of misfolded proteins in intracellular amyloid inclusions, typical of many neurodegenerative disorders including Huntington's and prion disease, is thought to occur after failure of the cellular protein quality control mechanisms. Here we examine the formation of misfolded protein inclusions in the eukaryotic cytosol of yeast and mammalian cell culture models. We identify two intracellular compartments for the sequestration of misfolded cytosolic proteins. Partition of quality control substrates to either compartment seems to depend on their ubiquitination status and aggregation state. Soluble ubiquitinated misfolded proteins accumulate in a juxtanuclear compartment where proteasomes are concentrated. In contrast, terminally aggregated proteins are sequestered in a perivacuolar inclusion. Notably, disease-associated Huntingtin and prion proteins are preferentially directed to the perivacuolar compartment. Enhancing ubiquitination of a prion protein suffices to promote its delivery to the juxtanuclear inclusion. Our findings provide a framework for understanding the preferential accumulation of amyloidogenic proteins in inclusions linked to human disease.

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  • Because small HSPs can bind abnormal proteins multivalently, they might seed and concentrate aggregate material.

    “Having multi-valent binding ability for aberrant proteins, the small HSPs may act to seed and concentrate aggregate material, consistent with findings in vivo (Escusa-Toret et al., 2013; Kaganovich et al., 2008; Specht et al., 2011) and in vitro (Haslbeck et al., 2005; Jiao et al., 2005).”

    From Widespread Proteome Remodeling and Aggregation in Aging C. elegans (2015) · cites this paper as Kaganovich et al., 2008

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Authors
Kaganovich, D., Kopito, R., & Frydman, J.
Affiliations
Stanford University (US)
Corresponding author
Frydman, Judith
Venue
Nature
Published
2008-08
Volume
454
Issue
7208
Pages
1088-1095
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1967025628
Cited by
932
References
57
Citations by year
2026: 24 · 2025: 29 · 2024: 41 · 2023: 47 · 2022: 40 · 2021: 52 · 2020: 55 · 2019: 53 · 2018: 54 · 2017: 76 · 2016: 74 · 2015: 65 · 2014: 71 · 2013: 59 · 2012: 58
FWCI
18.36
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • ePrints Soton (University of Southampton) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (R01GM056433)
  • National Institute of Neurological Disorders and Stroke (R01NS042842)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Genetic Neurodegenerative Diseases
Keywords
protein misfolding, protein quality control, ubiquitination, proteasome, protein aggregation, huntingtin, prion protein, autophagy, neurodegenerative diseases, yeast, mammalian cells
MeSH terms
Ubiquitin-Conjugating Enzyme UBC9, Cytosol, HeLa Cells, Humans, Prions, Proteins, Saccharomyces cerevisiae, Solubility, Protein Folding, Ubiquitin-Conjugating Enzymes, Proteasome Endopeptidase Complex, Von Hippel-Lindau Tumor Suppressor Protein, Ubiquitination

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