Mouse Mothers against decapentaplegic homolog 7,Smad7 ELI

Antagonist of signaling by TGF-beta (transforming growth factor) type 1 receptor superfamily members; has been shown to inhibit TGF-beta (Transforming growth factor) and activin signaling by associating with their receptors thus preventing SMAD2 access.

Functions as an adapter to recruit SMURF2 to the TGF-beta receptor complex.

Also acts by recruiting the PPP1R15A-PP1 complex to TGFBR1, which promotes its dephosphorylation.

Positively regulates PDPK1 kinase activity by stimulating its dissociation from the 14-3-3 protein YWHAQ which acts as a negative regulator.

{ECO:0000250|UniProtKB:O15105}.