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. 1990 Mar;87(5):1725–1729. doi: 10.1073/pnas.87.5.1725

Promoter switching in Epstein-Barr virus during the initial stages of infection of B lymphocytes.

M Woisetschlaeger 1, C N Yandava 1, L A Furmanski 1, J L Strominger 1, S H Speck 1
PMCID: PMC53555  PMID: 2155423

Abstract

Transcription of the genes encoding the six viral nuclear antigens present in Epstein-Barr virus latently infected lymphocytes can be initiated from one of two promoters (Cp and Wp) mapping near the left end of the viral genome. These promoters are used in a mutually exclusive manner in clonal cell lines established from either Burkitt lymphoma tumors or in vitro infection of peripheral B lymphocytes. In this paper the role of Cp and Wp during viral latency is investigated. Cp appears to be the promoter normally employed during established latent infection. Analysis of two cell lines that use Wp revealed a deletion spanning Cp in the endogenous viral genomes, suggesting that cell lines exhibiting Wp activity harbor mutated viral genomes with a nonfunctional Cp. However, in contrast to the preferred usage of Cp exhibited by established Epstein-Barr virus-infected cell lines, Wp was shown to be exclusively utilized during the initial stages of viral infection. In addition to Wp activity, Cp usage was apparent by 6 days post-infection. A model is proposed involving B-lymphocyte differentiation-driven promoter switching during the establishment of viral latency.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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