Cited by 256Parkinson's Disease Mechanisms and TreatmentsAutophagy in Disease and TherapyUbiquitin and proteasome pathways

Parkin structure and function

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Seirafi, Marjan, Kozlov, Guennadi, Gehring, Kalle·2015·The FEBS Journal

Abstract

Mutations in the parkin or PINK 1 genes are the leading cause of the autosomal recessive form of Parkinson's disease. The gene products, the E3 ubiquitin ligase parkin and the serine/threonine kinase PINK 1, are neuroprotective proteins, which act together in a mitochondrial quality control pathway. Here, we review the structure of parkin and mechanisms of its autoinhibition and function as a ubiquitin ligase. We present a model for the recruitment and activation of parkin as a key regulatory step in the clearance of depolarized or damaged mitochondria by autophagy (mitophagy). We conclude with a brief overview of other functions of parkin and considerations for drug discovery in the mitochondrial quality control pathway.

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Crossref · 10.1111/febs.13249

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  • Both PINK1 and Parkin have neuroprotective roles against various insults, such as oxidative stress and PD-relevant toxins.

    “Beyond their roles in mitophagy, mounting evidence suggested that both PINK1 and Parkin have neuroprotective roles against various insults, such as oxidative stress and PD-relevant toxins, although the underlying mechanisms still remain elusive [22, 23].”

    From miR-27a and miR-27b regulate autophagic clearance of damaged mitochondria by targeting PTEN-induced putative kinase 1 (PINK1) (2016) · cites this paper as [22]

    The Abstract calls both PINK1 and parkin neuroprotective, and “Other functions of parkin” says they work together to repair mitochondria in response to mild oxidative stress. The References include studies of parkin protecting neurons against toxins, but the paper does not establish comparable protection by PINK1 against PD-relevant toxins. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Proteasomal degradation of parkin occurs during mitophagy due to autoubiquitination, halting its activity.

    “Proteasomal degradation of parkin was demonstrated during mitophagy due to autoubiquitination, halting its activity28,29,33,34.”

    From Altered mitochondrial dynamics and function in APOE4-expressing astrocytes (2020) · cites this paper as [28]

    The section ‘Parkin is an RBR E3 ubiquitin ligase’ (page unavailable) says parkin becomes ubiquitinated and that this may play a role in its own degradation during the mitophagy pathway. It does not establish that parkin is degraded by the proteasome, that autoubiquitination causes that degradation, or that degradation halts its activity. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Parkin labels mitochondria for mitophagy by ubiquitinating specific mitochondrial proteins; parkin is then degraded by the proteasome/lysosome due to autoubiquitination.

    “Parkin labels mitochondria for mitophagy by ubiquitinating specific mitochondrial proteins; parkin is then degraded by the proteasome/lysosome due to autoubiquitination26–29.”

    From Altered mitochondrial dynamics and function in APOE4-expressing astrocytes (2020) · cites this paper as [28]

    The Introduction and “Parkin is an RBR E3 ubiquitin ligase” section say that parkin ubiquitinates outer mitochondrial membrane proteins, marking damaged mitochondria for mitophagy. The latter section says K6 ubiquitination of parkin may play a role in its own degradation; it does not establish that parkin is subsequently degraded by the proteasome or lysosome because of autoubiquitination. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • APOE4 astrocytes exhibit increased parkin levels.

    “increased parkin levels (targets mitochondria for mitophagy, followed by proteasomal/lysosomal degradation26–29)”

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Authors
Seirafi, M., Kozlov, G., & Gehring, K.
Affiliations
McGill University (CA)
Corresponding author
Gehring, Kalle
Venue
The FEBS Journal
Publisher
Wiley
Published
2015-03-16
Volume
282
Issue
11
Pages
2076-2088
ISSN
  • 1742-464X (ISSN-L)
  • 1742-4658
OpenAlex
W2013828402
Cited by
256
References
86
Citations by year
2026: 19 · 2025: 24 · 2024: 29 · 2023: 37 · 2022: 27 · 2021: 38 · 2020: 26 · 2019: 16 · 2018: 11 · 2017: 17 · 2016: 9 · 2015: 3
FWCI
1.75
Type
journal article
Language
en
Open access
Locations
  • FEBS Journal (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (MOP-125924)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
Parkin, PINK1, Parkinson's disease, mitochondrial quality control, mitophagy, E3 ubiquitin ligase, autoinhibition, protein structure, mitochondrial depolarization, neuroprotection, drug discovery
MeSH terms
Amino Acid Sequence, Animals, Humans, Mitochondria, Molecular Sequence Data, Neurons, Parkinson Disease, Protein Transport, Ubiquitin-Protein Ligases, Ubiquitination, Mitophagy

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