Analysis of the gB promoter of herpes simplex virus type 1: high-level expression requires both an 89-base-pair promoter fragment and a nontranslated leader sequence.
To investigate the cis-acting sequences involved in regulation of a herpes simplex virus gamma 1 gene, deletion analyses of the glycoprotein B (gB) gene promoter were performed. In transfection assays with gB-chloramphenicol acetyltransferase plasmids, high-level constitutive expression from the gB promoter was found with an 89-bp sequence (-69 to +20). Additional sequences in the 5'-transcribed noncoding leader region (+20 to +136) were required for full stimulation by herpes simplex virus infection. Plasmids with progressive deletions of the gB leader sequence demonstrated that chloramphenicol acetyltransferase expression in infected cells was proportional to the length of the leader region retained. In recombinant viruses containing a gB-gC gene fusion, a similar 83-bp (-60 to +23) region of the gB gene was found to promote accurately initiated gC mRNA from the viral genome with the same kinetics as the wild-type gB gene. Although the kinetics of expression remained the same, RNA abundance was greater with a 298-bp (-260 to +38) promoter than with the 83-bp promoter.
Pederson
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Department of Molecular and Cell Biology, Pennsylvania State University, University Park 16802.
Person
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Homa
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D000818:Animals; D001483:Base Sequence; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics; D004279:DNA, Viral; D015870:Gene Expression; D005814:Genes, Viral; D008969:Molecular Sequence Data; D010957:Plasmids; D011401:Promoter Regions, Genetic; D014176:Protein Biosynthesis; D021382:Protein Sorting Signals / Q000235:genetics*; D012333:RNA, Messenger / Q000378:metabolism; D018139:Simplexvirus / Q000235:genetics*; D014162:Transfection; D014709:Vero Cells
D004279:DNA, Viral; D021382:Protein Sorting Signals; D012333:RNA, Messenger; D015500:Chloramphenicol O-Acetyltransferase