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USP4 deubiquitinates TGFB. 3 / 3
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"Mechanistically, hepatocyte USP4 directly bound to and deubiquitinated transforming growth factor-beta activated kinase 1 (TAK1), leading to a suppression of the activation of downstream NF-kappaB and JNK cascades, which in turn reversed the disruption of the IRS-AKT-GSK3beta signaling."

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"The authors further go on to show that USP4 was able to deubiquitylate the TGF-beta receptor I (TbetaRI) directly and rescue it from proteasome mediated degradation."

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"USP4 has been reported to enhance TGFbeta signalling by directly interacting with and deubiquitylating type I TGFbeta receptor, ALK5 XREF_BIBR."