USP8 maintains embryonic stem cell stemness via deubiquitination of EPG5 View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Haifeng Gu, Xingxing Shi, Chao Liu, Chaoqun Wang, Ning Sui, Yu Zhao, Jiaqi Gong, Fuping Wang, Hong Zhang, Wei Li, Tongbiao Zhao

ABSTRACT

Embryonic stem cells (ESCs) can propagate in an undifferentiated state indefinitely in culture and retain the potential to differentiate into any somatic lineage as well as germ cells. The catabolic process autophagy has been reported to be involved in ESC identity regulation, but the underlying mechanism is still largely unknown. Here we show that EPG5, a eukaryotic-specific autophagy regulator which mediates autophagosome/lysosome fusion, is highly expressed in ESCs and contributes to ESC identity maintenance. We identify that the deubiquitinating enzyme USP8 binds to the Coiled-coil domain of EPG5. Mechanistically, USP8 directly removes non-classical K63-linked ubiquitin chains from EPG5 at Lysine 252, leading to enhanced interaction between EPG5 and LC3. We propose that deubiquitination of EPG5 by USP8 guards the autophagic flux in ESCs to maintain their stemness. This work uncovers a novel crosstalk pathway between ubiquitination and autophagy through USP8-EPG5 interaction to regulate the stemness of ESCs. More... »

PAGES

1465

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41467-019-09430-4

DOI

http://dx.doi.org/10.1038/s41467-019-09430-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1113161952

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30931944


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