[Term] id: PR:000027888 name: signal transducer and activator of transcription 1 isoform 1 phosphorylated 3 def: "A signal transducer and activator of transcription 1 isoform 1 phosphorylated form that has been modified on a Ser residue located in the conserved PMSP sequence at the C-terminal transactivation domain. Example: UniProtKB:P42224-1, Ser-727, MOD:00046." [PRO:PD, PMID:15322115] comment: Category=modification. synonym: "STAT1/iso:1/Phos:3" EXACT PRO-short-label [PRO:DNx] is_a: PR:000003075 ! signal transducer and activator of transcription 1 isoform 1 phosphorylated form relationship: has_part MOD:00046 ! O-phospho-L-serine