RNA-directed RNA polymerase L

UniProtKB accession:  Q66431

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UniProtKB description:  Displays RNA-directed RNA polymerase, deubiquitinating and deISGylase activities (PubMed:23345508). RNA-dependent RNA polymerase is responsible for replication and transcription of the viral RNA genome (By similarity). During transcription, synthesizes subgenomic RNAs and assures their capping by a cap-snatching mechanism, which involves the endonuclease activity cleaving the host capped pre-mRNAs. These short capped RNAs are then used as primers for viral transcription (By similarity). The deubiquitinating and deISGylating activities specifically cleaves poly-ubiquitinated conjugates and ISG15 from RIG-I, interfering with antiviral signaling pathways mediated by NF-kappaB and IRF signalings (By similarity). Favors K48 poly-Ub linkages (PubMed:23345508).