[Term] id: PR:000050148 name: smad1 phosphorylated 1 def: "A smad1 that has been phosphorylated on the last two Ser residues within the C-terminal SSxS motif as a result of the activation of the bone morphogenetic protein (BMP) signaling pathway. Example: UniProtKB:Q15797, Ser-463/Ser-465, MOD:00046." [PRO:DAN] comment: Category=modification. synonym: "SMAD1/Phos:1" EXACT PRO-short-label [PRO:DAN] synonym: "BMP receptor-activated smad1" EXACT [] is_a: PR:000000363 ! smad1 relationship: has_part MOD:00046 ! O-phospho-L-serine