Abstract:
:Autophagy perturbation represents an emerging therapeutic strategy in cancer. Although LATS1 and LATS2 kinases, core components of the mammalian Hippo pathway, have been shown to exert tumor suppressive activities, here we report a pro-survival role of LATS1 but not LATS2 in hepatocellular carcinoma (HCC) cells. Specifically, LATS1 restricts lethal autophagy in HCC cells induced by sorafenib, the standard of care for advanced HCC patients. Notably, autophagy regulation by LATS1 is independent of its kinase activity. Instead, LATS1 stabilizes the autophagy core-machinery component Beclin-1 by promoting K27-linked ubiquitination at lysine residues K32 and K263 on Beclin-1. Consequently, ubiquitination of Beclin-1 negatively regulates autophagy by promoting inactive dimer formation of Beclin-1. Our study highlights a functional diversity between LATS1 and LATS2, and uncovers a scaffolding role of LATS1 in mediating a cross-talk between the Hippo signaling pathway and autophagy.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Tang F,Gao R,Jeevan-Raj B,Wyss CB,Kalathur RKR,Piscuoglio S,Ng CKY,Hindupur SK,Nuciforo S,Dazert E,Bock T,Song S,Buechel D,Morini MF,Hergovich A,Matthias P,Lim DS,Terracciano LM,Heim MH,Hall MN,Christofori Gdoi
10.1038/s41467-019-13591-7subject
Has Abstractpub_date
2019-12-17 00:00:00pages
5755issue
1issn
2041-1723pii
10.1038/s41467-019-13591-7journal_volume
10pub_type
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