Cited by 124Autophagy in Disease and TherapyUbiquitin and proteasome pathwaysRedox biology and oxidative stress

Oxidized proteins: Mechanisms of removal and consequences of accumulation

Dunlop, Rachael A., Brunk, Ulf T., Rodgers, Kenneth J.·2009·IUBMB Life

Abstract

Elevated levels of oxidized proteins are reported in diseased tissue from age‐related pathologies such as atherosclerosis, neurodegenerative disorders, and cataract. Unlike the precise mechanisms that exist for the repair of nucleic acids, lipids, and carbohydrates, the primary pathway for the repair of oxidized proteins is complete catabolism to their constitutive amino acids. This process can be inefficient as is evidenced by their accumulation. It is generally considered that damaged proteins are degraded by the proteasome; however, this is only true for mildly oxidized proteins, because substrates must be unfolded to enter the narrow catalytic core. Rather, evidence suggests that moderately or heavily oxidized proteins are endocytosed and enter the endosomal/lysosomal system, indicating co‐operation between the proteasomes and the lysosomes. Heavily modified substrates are incompletely degraded and accumulate within the lysosomal compartments resulting in the formation of lipofuscin‐like, autofluorescent aggregates. Accumulation eventually results in impaired turnover of large organelles such as proteasomes and mitochondria, lysosomal destablization, leakage of proteases into the cytosol and apoptosis. In this review, we summarize reports published since our last assessments of the field of oxidized protein degradation including a role for modified proteins in the induction of apoptosis. © 2009 IUBMB IUBMB Life, 61(5): 522–527, 2009

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Crossref · 10.1002/iub.189

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Authors
Dunlop, R. A., Brunk, U. T., & Rodgers, K. J.
Affiliations
Linköping University (SE)
Corresponding author
  • Dunlop, Rachael A.
  • Brunk, Ulf T.
  • Rodgers, Kenneth J.
Venue
IUBMB Life
Publisher
Wiley
Published
2009-04-23
Volume
61
Issue
5
Pages
522-527
ISSN
  • 1521-6543 (ISSN-L)
  • 1521-6551
OpenAlex
W2008128102
Cited by
124
References
51
Citations by year
2026: 3 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 4 · 2020: 7 · 2019: 5 · 2018: 9 · 2017: 8 · 2016: 13 · 2015: 12 · 2014: 17 · 2013: 7 · 2012: 10
FWCI
1.29
Type
journal article
Language
en
Open access
closed
Locations
  • IUBMB Life (publishedVersion)
  • PubMed (publishedVersion)
  • OPUS - Open Publications of UTS Scholars (University of Technology Sydney) (submittedVersion)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
oxidized proteins, protein degradation, proteasome, lysosomes, endocytosis, endosomal-lysosomal system, lipofuscin, protein accumulation, apoptosis, mitochondrial dysfunction, lysosomal destabilization, age-related diseases, atherosclerosis, neurodegenerative diseases, cataract
MeSH terms
Aging, Lysosomes, Oxidation-Reduction, Proteins, Endosomes, Apoptosis, Proteasome Endopeptidase Complex

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