Temporal regulation of equine herpesvirus type 3 transcription.


Journal Article

The transcription of equine herpesvirus type 3 (EHV-3; equine coital exanthema virus) has been examined and found to be temporally regulated into three classes: immediate early (IE), early (E), and late (L). Hybridization of in vivo 32PO4-labeled transcripts revealed that IE transcript(s) are derived exclusively from the inverted repeat segments (IRs) of the viral genome, while E and L transcripts are not restricted to any specific region of the genome. Northern blot analysis of EHV-3 IE RNA revealed a single transcript of approximately 5.7 kb (3.8 MDa). We have previously shown that transcription of equine herpesvirus type 1 (EHV-1) DNA is temporally regulated and produces a single 6 kb IE RNA which is derived from the IRs segments. In this paper, we show that the EHV-1 and EHV-3 IE RNA species are homologous, reflecting the colinearity of the genomes of these two related viruses. While four IE polypeptides are synthesized in EHV-1 infected cells in the presence of actinomycin D following the removal of a cycloheximide block, only one major IE polypeptide (180 kDa) is detectable in EHV-3 infected cells under these conditions. However, immunoprecipitation of EHV-3 infected cell extracts with polyvalent rabbit antisera to IE1 of EHV-1 revealed at least two other viral specific IE polypeptides.

Full Text

Cited Authors

  • Sullivan, DC; Gray, WL; Caughman, GB; Robertson, AT; O'Callaghan, DJ

Published Date

  • February 1990

Published In

Volume / Issue

  • 15 / 2

Start / End Page

  • 135 - 148

PubMed ID

  • 2157315

Pubmed Central ID

  • 2157315

Electronic International Standard Serial Number (EISSN)

  • 1872-7492

International Standard Serial Number (ISSN)

  • 0168-1702

Digital Object Identifier (DOI)

  • 10.1016/0168-1702(90)90004-u


  • eng