SKP2- and OTUD1-regulated non-proteolytic ubiquitination of YAP promotes YAP nuclear localization and activity.
Dysregulation of YAP localization and activity is associated with pathological conditions such as cancer. Although activation of the Hippo phosphorylation cascade is known to cause cytoplasmic retention and inactivation of YAP, emerging evidence suggests that YAP can be regulated in a Hippo-independent manner. Here, we report that YAP is subject ... to non-proteolytic, K63-linked polyubiquitination by the SCFSKP2 E3 ligase complex (SKP2), which is reversed by the deubiquitinase OTUD1. The non-proteolytic ubiquitination of YAP enhances its interaction with its nuclear binding partner TEAD, thereby inducing YAP's nuclear localization, transcriptional activity, and growth-promoting function. Independently of Hippo signaling, mutation of YAP's K63-linkage specific ubiquitination sites K321 and K497, depletion of SKP2, or overexpression of OTUD1 retains YAP in the cytoplasm and inhibits its activity. Conversely, overexpression of SKP2 or loss of OTUD1 leads to nuclear localization and activation of YAP. Altogether, our study sheds light on the ubiquitination-mediated, Hippo-independent regulation of YAP.
Mesh Terms:
Active Transport, Cell Nucleus, Adaptor Proteins, Signal Transducing, Amino Acid Substitution, Animals, Binding Sites, Cell Line, Cell Nucleus, DNA-Binding Proteins, Female, Gene Knockout Techniques, HEK293 Cells, Humans, Mice, Mutagenesis, Site-Directed, Nuclear Proteins, Phosphoproteins, Protein-Serine-Threonine Kinases, S-Phase Kinase-Associated Proteins, Transcription Factors, Ubiquitin-Specific Proteases, Ubiquitination
Active Transport, Cell Nucleus, Adaptor Proteins, Signal Transducing, Amino Acid Substitution, Animals, Binding Sites, Cell Line, Cell Nucleus, DNA-Binding Proteins, Female, Gene Knockout Techniques, HEK293 Cells, Humans, Mice, Mutagenesis, Site-Directed, Nuclear Proteins, Phosphoproteins, Protein-Serine-Threonine Kinases, S-Phase Kinase-Associated Proteins, Transcription Factors, Ubiquitin-Specific Proteases, Ubiquitination
Nat Commun
Date: Dec. 11, 2017
PubMed ID: 29891922
View in: Pubmed Google Scholar
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