Control of Viral Latency by Episome Maintenance Proteins.

Alessandra De Leo, Abram Calderon, Paul M Lieberman

Trends in microbiology 2020 Feb

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The human DNA tumor viruses Epstein-Barr virus (EBV), Kaposi's sarcoma-associated herpesvirus (KSHV), and human papillomavirus (HPV) share the common property of persisting as multicopy episomes in the nuclei of rapidly dividing host cells. These episomes form the molecular basis for viral latency and are etiologically linked to virus-associated cancers. Episome maintenance requires epigenetic programming to ensure the proper control of viral gene expression, DNA replication, and genome copy number. For these viruses, episome maintenance requires a dedicated virus-encoded episome maintenance protein (EMP), namely LANA (KSHV), EBNA1 (EBV), and E2 (HPV). Here, we review common features of these viral EMPs and discuss recent advances in understanding how they contribute to the epigenetic control of viral episome maintenance during latency. Copyright © 2019 Elsevier Ltd. All rights reserved.

Citation

Alessandra De Leo, Abram Calderon, Paul M Lieberman. Control of Viral Latency by Episome Maintenance Proteins. Trends in microbiology. 2020 Feb;28(2):150-162