The protein encoded by this gene is a nuclear protein that binds the E3 ubiquitin ligase SMURF2. Upon binding, this complex translocates to the cytoplasm, where it interacts with TGF-beta receptor type-1 (TGFBR1), leading to the degradation of both the encoded protein and TGFBR1. Expression of this gene is induced by TGFBR1. Variations in this gene are a cause of susceptibility to colorectal cancer type 3 (CRCS3). Several transcript variants encoding different isoforms have been found for this gene.,SMAD7,CRCS3,MADH7,MADH8,Epigenetics & Nuclear Signaling,Signal Transduction,Cell Biology & Developmental Biology,TGF-b-Smad Signaling Pathway,SMADs,SMAD7