Tight regulation of TGF-beta (transforming growth factor-beta) superfamily signalling is important for normal cellular functions and tissue homoeostasis. Since TGF-beta superfamily signalling pathways are activated by a short phosphorylation cascade, from receptor phosphorylation to subsequent phosphorylation and activation of downstream signal transducer R-Smads (receptor-activated Smads), reversible phosphorylation serves as a critical step to assure proper TGF-beta signalling. The present article will review the current progress on the understanding of dynamic phosphorylation in TGF-beta signalling and the essential role of protein phosphatases in this process.
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Liu et al. (2010) studied this question.
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