Spatiotemporally controlled induction of autophagy-mediated lysosome turnover.

Abstract:

:Lysosomes are the major degradative compartments within cells, harbouring a wide variety of hydrolytic enzymes within their lumen. Release of lysosomal hydrolases from lysosomes into the cell cytoplasm results in cell death. Here we report that damaged lysosomes undergo autophagic turnover. Using a light-induced lysosome impairing scheme that can be controlled spatially and temporally within a cell, we show that damaged lysosomes are selectively ubiquitinated, recruit autophagic proteins and are eventually incorporated into autolysosomes for degradation. We propose that autophagic removal of lysosomes, which we term lysophagy, is a surveillance mechanism that alleviates cells from the adverse effects of lysosomal damage. We envision our method to induce lysosomal damage will enable detailed molecular studies of the lysophagy pathway in the future.

journal_name

Nat Commun

journal_title

Nature communications

authors

Hung YH,Chen LM,Yang JY,Yang WY

doi

10.1038/ncomms3111

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

2111

issn

2041-1723

pii

ncomms3111

journal_volume

4

pub_type

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