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. 1993 Aug;67(8):4842–4847. doi: 10.1128/jvi.67.8.4842-4847.1993

The herpes simplex virus UL37 protein is phosphorylated in infected cells.

A G Albright 1, F J Jenkins 1
PMCID: PMC237871  PMID: 8392618

Abstract

The herpes simplex virus type 1 (HSV-1) UL37 open reading frame encodes a 120-kDa late (gamma 1), nonstructural protein in infected cells. Recent studies in our laboratory have demonstrated that the UL37 protein interacts in the cytoplasm of infected cells with ICP8, the major HSV-1 DNA-binding protein. As a result of this interaction, the UL37 protein is transported to the nucleus and can be coeluted with ICP8 from single-stranded DNA columns. Pulse-labeling and pulse-chase studies of HSV-1-infected cells with [35S]methionine and 32Pi demonstrated that UL37 was a phosphoprotein which did not have a detectable rate of turnover. The protein was phosphorylated soon after translation and remained phosphorylated throughout the viral replicative cycle. UL37 protein expressed from a vaccinia virus recombinant was also phosphorylated during infection, suggesting that the UL37 protein was phosphorylated by a cellular kinase and that interaction with the ICP8 protein was not a prerequisite for UL37 phosphorylation.

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