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Replication of Epstein-Barr viral DNA.
Cold Spring Harbor Perspect. Biol. 5:a013029 (2013)
Epstein-Barr virus (EBV) is a paradigm for human tumor viruses: it is the first virus recognized to cause cancer in people; it causes both lymphomas and carcinomas; yet these tumors arise infrequently given that most people in the world are infected with the virus. EBV is maintained extrachromosomally in infected normal and tumor cells. Eighty-four percent of these viral plasmids replicate each S phase, are licensed, require a single viral protein for their synthesis, and can use two functionally distinct origins of DNA replication, oriP, and Raji ori. Eighty-eight percent of newly synthesized plasmids are segregated faithfully to the daughter cells. Infectious viral particles are not synthesized under these conditions of latent infection. This plasmid replication is consistent with survival of EBV's host cells. Rare cells in an infected population either spontaneously or following exogenous induction support EBV's lytic cycle, which is lethal for the cell. In this case, the viral DNA replicates 100-fold or more, uses a third kind of viral origin of DNA replication, oriLyt, and many viral proteins. Here we shall describe the three modes of EBV's replication as a function of the viral origins used and the viral and cellular proteins that mediate the DNA synthesis from these origins focusing, where practical, on recent advances in our understanding.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Origin Recognition Complex ; Ebv Nuclear Antigen-1 ; Polymerase Processivity Factor ; Virus Lytic Replication ; Latent Cycle Origin ; Binding Protein ; Transcriptional Activation ; Downstream Component ; Episomal Maintenance ; Catalytic Subunit
e-ISSN
1943-0264
Quellenangaben
Volume: 5,
Issue: 1,
Article Number: a013029
Publisher
Cold Spring Harbor Laboratory Press
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Gene Vector (AGV)