[Term] id: PR:000048848 name: DNA-directed RNA polymerase II subunit RPB1 phosphorylated 3 (human) def: "A DNA-directed RNA polymerase II subunit RPB1 (human) that has been post-translationally modified to include phosphoserine at the fifth position of one or more of the C-terminal heptad repeats (YSPTSPS) of the amino acid sequence represented by UniProtKB:P24928. Example: UniProtKB:P24928-1, Ser-1794, MOD:00046." [PRO:DAN, Reactome:R-HSA-77100] comment: Category=organism-modification. synonym: "hPOLR2A/Phos:3" EXACT PRO-short-label [PRO:DNx] synonym: "UniProtKB:P24928-1, Ser-1794, MOD:00046" NARROW PRO-proteoform-std [PRO:DAN] xref: Reactome:R-HSA-77100 "PR:000048848 located_in GO:0005654" is_a: PR:P24928 ! DNA-directed RNA polymerase II subunit RPB1 (human) relationship: has_part MOD:00046 ! O-phospho-L-serine relationship: only_in_taxon NCBITaxon:9606 ! Homo sapiens