UniProt functional annotation for Q9IMP3

UniProt code: Q9IMP3.

Organism: Influenza C virus (strain C/Johannesburg/1/1966).
Taxonomy: Viruses; Riboviria; Orthornavirae; Negarnaviricota; Polyploviricotina; Insthoviricetes; Articulavirales; Orthomyxoviridae; Gammainfluenzavirus.
 
Function: Plays an essential role in transcription initiation and cap- stealing mechanism, in which cellular capped pre-mRNAs are used to generate primers for viral transcription. Recognizes and binds a wide range of cap structures of target pre-RNAs which are subsequently cleaved after 10-13 nucleotides by the viral protein PA. Plays a role in the initiation of the viral genome replication and modulates the activity of the ribonucleoprotein (RNP) complex. {ECO:0000255|HAMAP- Rule:MF_04062, ECO:0000269|PubMed:33208942}.
 
Subunit: Influenza RNA polymerase is composed of three subunits: PB1, PB2 and PA. Interacts (via N-terminus) with PB1 (via C-terminus). Interacts with nucleoprotein NP (via N-terminus). Interacts with host ANP32A (via C-terminus); this interaction promotes viral RNA synthesis. {ECO:0000255|HAMAP-Rule:MF_04062, ECO:0000269|PubMed:33208942}.
Subcellular location: Virion {ECO:0000255|HAMAP-Rule:MF_04062}. Host nucleus {ECO:0000255|HAMAP-Rule:MF_04062}.
Similarity: Belongs to the influenza viruses PB2 family. {ECO:0000255|HAMAP-Rule:MF_04062}.

Annotations taken from UniProtKB at the EBI.