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PINK1 is degraded through the N-end rule pathway

Open access
Yamano, Koji, Youle, Richard J·2013·Autophagy

Abstract

PINK1, a mitochondrial serine/threonine kinase, is the product of a gene mutated in an autosomal recessive form of Parkinson disease. PINK1 is constitutively degraded by an unknown mechanism and stabilized selectively on damaged mitochondria where it can recruit the E3 ligase PARK2/PARKIN to induce mitophagy. Here, we show that, under steady-state conditions, endogenous PINK1 is constitutively and rapidly degraded by E3 ubiquitin ligases UBR1, UBR2 and UBR4 through the N-end rule pathway. Following precursor import into mitochondria, PINK1 is cleaved in the transmembrane segment by a mitochondrial intramembrane protease PARL generating an N-terminal destabilizing amino acid and then retrotranslocates from mitochondria to the cytosol for N-end recognition and proteasomal degradation. Thus, sequential actions of mitochondrial import, PARL-processing, retrotranslocation and recognition by N-end rule E3 enzymes for the ubiquitin proteosomal degradation defines the rapid PINK1 turnover. PINK1 steady-state elimination by the N-end rule identifies a novel organelle to cytoplasm turnover pathway that yields a mechanism to flag damaged mitochondria for autophagic elimination.

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Metadata

Authors
Yamano, K., & Youle, R. J.
Venue
Autophagy
Published
2013-11-03
Volume
9
Issue
11
Pages
1758-1769
ISSN
  • 1554-8627 (ISSN-L)
  • 1554-8635
OpenAlex
W2048984899
Cited by
672
References
11
FWCI
21.66
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: PINK1 is degraded through the N-end rule pathway. https://app.cochat.ai/papers/10.4161/auto.24633
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Yamano, K., & Youle, R. J. (2013). PINK1 is degraded through the N-end rule pathway. Autophagy. https://doi.org/10.4161/auto.24633

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