DNA polymerase processivity factor BMRF1

UniProtKB accession:  P03191

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UniProtKB description:  Acts as a DNA polymerase processivity factor; a transcriptional activator for several EBV promoters and inhibits the host DNA damage response (DDR) to double-stranded DNA breaks (PubMed:16641300, PubMed:8764021, PubMed:19801550, PubMed:31462557). Plays an essential role in the viral lytic DNA replication by acting as a polymerase accessory subunit (PubMed:16641300, PubMed:19801550). Stimulates the viral DNA polymerase activity and appears to function with it as a holoenzyme (PubMed:19801550). Increases the processivity of the viral polymerase, probably by acting as a sliding clamp that prevents dissociation of the polymerase from the active template (PubMed:19801550). In addition, BMRF1 transcriptionally activates the oriLyt early BHLF1 promoter (PubMed:8764021, PubMed:9126259). Promotes G1/S cell cycle arrest through p53 induction (PubMed:24501404).