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. 1982 Aug;79(16):4917–4921. doi: 10.1073/pnas.79.16.4917

Differentiation between alpha promoter and regulator regions of herpes simplex virus 1: the functional domains and sequence of a movable alpha regulator.

S Mackem, B Roizman
PMCID: PMC346796  PMID: 6289323

Abstract

The herpes simplex virus genome consists of at least three groups of genes--alpha, beta, and gamma--whose expression is coordinately regulated and sequentially ordered in a cascade fashion. We have established that the elements involved in regulation of alpha genes are a sequence that promotes gene expression and a sequence that confers alpha regulation on the gene by responding to trans-acting regulatory signals. The domains of these sequences were mapped by determining the regulation of thymidine kinase (TK) in L cells converted to TK+ phenotype by chimeric TK indicator genes. The chimeric genes were constructed from appropriate portions of the TK gene fused to donor sequences derived from the 5' nontranscribed and nontranslated leader portions of the viral alpha gene 4. The results were as follows. (i) The natural beta TK indicator extending 5' up to -80 and the chimeric alpha TK extending 5' up to -110 both converted cells to TK+ phenotype but were not regulated. (ii) A segment of the regulator region of the alpha gene 4, extending 5' from position -110, confers inducible alpha-type regulation when fused to the nonregulated but expressible beta TK indicator described above. (iii) The extent of gene induction appears to hinge on the size of the regulatory region inserted into the chimeric gene and correlates with the presence of repeated consensus sequences and G+C-rich inverted repeats in the regulatory region of the alpha gene 4 and other alpha genes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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