[Term] id: PR:000000602 name: transcription factor Sp1 isoform 1 phosphorylated 4 def: "A transcription factor Sp1 isoform 1 phosphorylated form in which the phosphorylation occurs at the first serine/threonine stretch by ATM kinase in response to DNA damage." [PMID:18171990] comment: Category=modification. synonym: "SP1/iso:1/Phos:4" EXACT PRO-short-label [PRO:DNx] is_a: PR:000000493 ! transcription factor Sp1 isoform 1 phosphorylated form relationship: has_part MOD:00046 ! O-phospho-L-serine relationship: has_part MOD:00047 ! O-phospho-L-threonine