transcription factor phosphorylated and activated by bone morphogenetic protein receptor kinases. Phosphorylated Smads dimerize with collaborating Smad4 and are translocated into the nucleus, where they regulate transcription of target genes. Participates in a wide range of critical processes including morphogenesis, cell-fate determination, proliferation, differentiation and apoptosis. Two alternatively spliced products have been described. Note: This description may include information from UniProtKB.
Protein type: DNA-binding; Transcription, coactivator/corepressor