Anatomy of herpes simplex virus (HSV) DNA. X. Mapping of viral genes by analysis of polypeptides and functions specified by HSV-1 x HSV-2 recombinants

Lawrence S Morse, L. Pereira, B. Roizman, P. A. Schaffer

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125 Scopus citations


In an earlier paper (Morse et al., J. Virol. 24:231-248, 1977) the authors reported on the provenance of the DNA sequences in 26 herpes simplex virus type 1 (HSV-1) x HSV-2 recombinants as determined from analyses of their DNAs with at least five restriction endonucleases. This report deals with the polypeptides specified by the recombinants and by their HSV-1 and HSV-2 parents. The authors have identified the corresponding HSV-1 and HSV-2 polypeptides with molecular weights ranging from 20,000 to more than 200,000, the polypeptides that undergo rapid post-translational processing, and polypeptides that vary intratypically in apparent molecular weight. By comparing the segregation patterns of the polypeptides with those of the DNA sequence of the recombinants, the authors mapped the templates specifying 26 polypeptides and several viral functions on the physical map of HSV DNA. The data show the following: α polypeptides map at the termini of the L and S components of the HSV DNA. Although α ICP 27 maps entirely within the reiterated region of the L component, the template for α ICP 4 may lie only in part within the reiterated sequences of the S component. Of note is the finding that cells infected with a recombinant that contains both HSV-1 and HSV-2 DNA sequences in the S component produced α ICP 4 of both HSV-1 and HSV-2. Templates specifying β and γ polypeptides map in the L component and appear to be randomly distributed. Thymidine kinase and resistance to phosphonoacetic acid mapped in the L component. In addition, the authors have taken advantage of the rapid inhibition of host protein synthesis characteristic of HSV-2 infections and syncytial plaque morphology to also map the template(s) responsible for these functions in the L component. The implications of the template arrangement in HSV DNA are discussed.

Original languageEnglish (US)
Pages (from-to)389-410
Number of pages22
JournalJournal of Virology
Issue number2
StatePublished - 1978
Externally publishedYes

ASJC Scopus subject areas

  • Immunology


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