Abstract
RNF214 is an understudied ubiquitin ligase with little knowledge of its biological functions or protein substrates. Here we show that the TEAD transcription factors in the Hippo pathway are substrates of RNF214. RNF214 induces non-proteolytic ubiquitylation at a conserved lysine residue of TEADs, enhances interactions between TEADs and YAP, and promotes transactivation of the downstream genes of the Hippo signaling. Moreover, YAP and TAZ could bind polyubiquitin chains, implying the underlying mechanisms by which RNF214 regulates the Hippo pathway. Furthermore, RNF214 is overexpressed in hepatocellular carcinoma (HCC) and inversely correlates with differentiation status and patient survival. Consistently, RNF214 promotes tumor cell proliferation, migration, and invasion, and HCC tumorigenesis in mice. Collectively, our data reveal RNF214 as a critical component in the Hippo pathway by forming a signaling axis of RNF214-TEAD-YAP and suggest that RNF214 is an oncogene of HCC and could be a potential drug target of HCC therapy.
© 2024. The Author(s).
MeSH terms
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Adaptor Proteins, Signal Transducing / genetics
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Adaptor Proteins, Signal Transducing / metabolism
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Animals
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Carcinoma, Hepatocellular* / genetics
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Carcinoma, Hepatocellular* / metabolism
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Carcinoma, Hepatocellular* / pathology
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Cell Line, Tumor
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Cell Movement / genetics
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Cell Proliferation*
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DNA-Binding Proteins* / genetics
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DNA-Binding Proteins* / metabolism
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Disease Progression
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Female
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Gene Expression Regulation, Neoplastic
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HEK293 Cells
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Hippo Signaling Pathway
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Humans
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Liver Neoplasms* / genetics
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Liver Neoplasms* / metabolism
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Liver Neoplasms* / pathology
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Male
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Mice
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Mice, Nude
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Nuclear Proteins / genetics
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Nuclear Proteins / metabolism
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Signal Transduction*
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TEA Domain Transcription Factors* / metabolism
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Transcription Factors* / genetics
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Transcription Factors* / metabolism
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Ubiquitin-Protein Ligases / genetics
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Ubiquitin-Protein Ligases / metabolism
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Ubiquitination*
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YAP-Signaling Proteins* / metabolism
Substances
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Transcription Factors
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DNA-Binding Proteins
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YAP-Signaling Proteins
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TEA Domain Transcription Factors
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Adaptor Proteins, Signal Transducing
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YAP1 protein, human
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Ubiquitin-Protein Ligases
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TEAD1 protein, human
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Nuclear Proteins