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Endothelial FAT1 inhibits angiogenesis by controlling YAP/TAZ protein degradation via E3 ligase MIB2

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Item Type:Article
Title:Endothelial FAT1 inhibits angiogenesis by controlling YAP/TAZ protein degradation via E3 ligase MIB2
Creators Name:Li, R. and Shao, J. and Jin, Y.J. and Kawase, H. and Ong, Y.T. and Troidl, K. and Quan, Q. and Wang, L. and Bonnavion, R. and Wietelmann, A. and Helmbacher, F. and Potente, M. and Graumann, J. and Wettschureck, N. and Offermanns, S.
Abstract:Activation of endothelial YAP/TAZ signaling is crucial for physiological and pathological angiogenesis. The mechanisms of endothelial YAP/TAZ regulation are, however, incompletely understood. Here we report that the protocadherin FAT1 acts as a critical upstream regulator of endothelial YAP/TAZ which limits the activity of these transcriptional cofactors during developmental and tumor angiogenesis by promoting their degradation. We show that loss of endothelial FAT1 results in increased endothelial cell proliferation in vitro and in various angiogenesis models in vivo. This effect is due to perturbed YAP/TAZ protein degradation, leading to increased YAP/TAZ protein levels and expression of canonical YAP/TAZ target genes. We identify the E3 ubiquitin ligase Mind Bomb-2 (MIB2) as a FAT1-interacting protein mediating FAT1-induced YAP/TAZ ubiquitination and degradation. Loss of MIB2 expression in endothelial cells in vitro and in vivo recapitulates the effects of FAT1 depletion and causes decreased YAP/TAZ degradation and increased YAP/TAZ signaling. Our data identify a pivotal mechanism of YAP/TAZ regulation involving FAT1 and its associated E3 ligase MIB2, which is essential for YAP/TAZ-dependent angiogenesis.
Keywords:Angiogenesis, Cell Growth, Cell Signalling
Source:Nature Communications
Publisher:Nature Publishing Group
Page Range:1980
Date:8 April 2023
Official Publication:https://doi.org/10.1038/s41467-023-37671-x
PubMed:View item in PubMed

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