Cover Image

A long-lived pool of PINK1 imparts a molecular memory of depolarization-induced activity

The Parkinson’s disease-linked kinase, PINK1, is a short-lived protein that undergoes cleavage upon mitochondrial import leading to its proteasomal degradation. Under depolarizing conditions, it accumulates on mitochondria where it becomes activated, phosphorylating both ubiquitin and the ubiquitin...

Full description

Saved in:
Bibliographic Details
Main Authors: Pollock, Liam (Author) , Georgiou, Ioanna Ch. (Author) , Rusilowicz-Jones, Emma V. (Author) , Clague, Michael J. (Author) , Urbé, Sylvie (Author)
Format: Article (Journal)
Language:English
Published: 28 Feb 2025
In: Science advances
Year: 2025, Volume: 11, Issue: 9, Pages: 1-11
ISSN:2375-2548
DOI:10.1126/sciadv.adr1938
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1126/sciadv.adr1938
Verlag, kostenfrei, Volltext: https://www.science.org/doi/10.1126/sciadv.adr1938
Get full text
Author Notes:Liam Pollock, Ioanna Ch. Georgiou, Emma V. Rusilowicz-Jones, Michael J. Clague, Sylvie Urbé
Description
Summary:The Parkinson’s disease-linked kinase, PINK1, is a short-lived protein that undergoes cleavage upon mitochondrial import leading to its proteasomal degradation. Under depolarizing conditions, it accumulates on mitochondria where it becomes activated, phosphorylating both ubiquitin and the ubiquitin E3 ligase Parkin, at Ser65. Our experiments reveal that in retinal pigment epithelial cells, only a fraction of PINK1 becomes stabilized after depolarization by electron transport chain inhibitors. Furthermore, the observed accrual of PINK1 cannot be completely accounted for without an accompanying increase in biosynthesis. We have used a ubiquitylation inhibitor TAK-243 to accumulate cleaved PINK1. Under these conditions, generation of unconjugated “free” phospho-ubiquitin serves as a proxy readout for PINK1 activity. This has enabled us to find a preconditioning phenomenon, whereby an initial depolarizing treatment leaves a residual pool of active PINK1 that remains competent to seed the activation of nascent cleaved PINK1 following a 16-hour recovery period.
Item Description:Gesehen am 25.07.2025
Physical Description:Online Resource
ISSN:2375-2548
DOI:10.1126/sciadv.adr1938

Similar Items