The gamma2 late glycoprotein K promoter of equine herpesvirus 1 is differentially regulated by the IE and EICP0 proteins.

Journal Article (Journal Article)

The equine herpesvirus 1 immediate-early (IE) phosphoprotein is essential for the activation of transcription from viral early and late promoters and trans-represses its own promoter. Transient-transfection assays showed that the IE protein trans-represses the gamma2 late gK promoter. Gel shift and DNase I footprinting assays demonstrated that the IE protein binds to the gK promoter sequences from -42 to -26 and from -13 to +12 that overlap the transcription initiation site (+1). These results indicated that the IE protein binds to the transcription initiation site of the gK promoter sequences, thereby repressing transcription. On the other hand, the EICP0 protein trans-activates the gamma2 late gK promoter [Bowles, D. E., Holden, V. R., Zhao, Y., and O'Callaghan, D. J. (1997). The ICP0 protein of equine herpesvirus 1 is an early protein that independently transactivates expression of all classes of viral promoters. J. Virol. 71, 4904-4914]. Overall, the EICP0 protein is able to release the gK promoter from the repressive effects of the IE protein. It has not been previously demonstrated that the major immediate-early transcriptional regulator of a herpesvirus represses expression of a late gene during infection.

Full Text

Duke Authors

Cited Authors

  • Kim, SK; Bowles, DE; O'callaghan, DJ

Published Date

  • April 10, 1999

Published In

Volume / Issue

  • 256 / 2

Start / End Page

  • 173 - 179

PubMed ID

  • 10191181

International Standard Serial Number (ISSN)

  • 0042-6822

Digital Object Identifier (DOI)

  • 10.1006/viro.1999.9608


  • eng

Conference Location

  • United States