[Term] id: PR:000049745 name: influenzavirus RNA-directed RNA polymerase catalytic subunit def: "A protein that is a translation product of the Influenza A virus PB1 gene or a 1:1 ortholog thereof. PB1 is a component of the influenzavirus RNA polymerase which has a role in role in transcription initiation and cap-stealing mechanism. PB1 is responsible for replication and transcription of virus RNA segments." [PRO:CNA, PMID:23600869, UniProtKB:P03431] comment: Category=gene. Requested by=IEDB. Requested by=ImmPort. synonym: "flu-PB1" EXACT PRO-short-label [PRO:DAN] is_a: PR:000000001 ! protein