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Review Article |
Department of Molecular Virology, Immunology, and Medical Genetics, Center for Retrovirus Research, and Comprehensive Cancer Center, Ohio State University Medical Center, 2078 Graves Hall, 333 West 10th Ave, Columbus, OH 43210, USA1
Ohio State University Biochemistry Graduate Program, Ohio State University, USA2
Molecular, Cellular, and Developmental Biology Graduate Program, Ohio State University, USA3
Author for correspondence: Louis Mansky. Fax +1 614 292 9805. e-mail mansky.3{at}osu.edu
Herpesviruses and poxviruses are known to encode the DNA repair enzyme uracil-DNA glycosylase (UNG), an enzyme involved in the base excision repair pathway that specifically removes the RNA base uracil from DNA, while at least one retrovirus (human immunodeficiency virus type 1) packages cellular UNG into virus particles. In these instances, UNG is implicated as being important in virus replication. However, a clear understanding of the role(s) of UNG in virus replication remains elusive. Herpesviruses, poxviruses and some retroviruses encode dUTPase, an enzyme that can minimize the misincorporation of uracil into DNA. The encoding of dUTPase by these viruses also implies their importance in virus replication. An understanding at the molecular level of how these viruses replicate in non-dividing cells should provide clues to the biological relevance of UNG and dUTPase function in virus replication.
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