New insights into TGF-beta-Smad signalling - PubMed (original) (raw)
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New insights into TGF-beta-Smad signalling
Peter ten Dijke et al. Trends Biochem Sci. 2004 May.
Abstract
Transforming growth factor beta (TGF-beta) initiates its diverse cellular responses by binding to and activating specific cell surface receptors that have intrinsic serine/threonine kinase activity. These activated TGF-beta receptors stimulate the phosphorylation of receptor-regulated Smad proteins, which in turn form complexes with Smad4 that accumulate in the nucleus and regulate the transcription of target genes. TGF-beta responses can be cell-type specific and are dependent on both the concentration of TGF-beta signalling components and the activity of other signal transduction pathways, which can either synergize with or antagonize the TGF-beta pathway. Recent research has provided insights into the specificity determinants of TGF-beta-Smad signalling, including combinatorial ligand-receptor associations, selective interactions between the Smads and other pathway components that are mediated through defined binding motifs, and the differential regulation of duration and intensity of signalling.
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