Synthesis of predominantly unspliced cytoplasmic RNAs by chimeric herpes simplex virus type 1 thymidine kinase-human beta-globin genes
- PMID: 3018535
- PMCID: PMC366905
- DOI: 10.1128/mcb.5.8.1894-1900.1985
Synthesis of predominantly unspliced cytoplasmic RNAs by chimeric herpes simplex virus type 1 thymidine kinase-human beta-globin genes
Abstract
The herpes simplex virus type 1 thymidine kinase (tk) gene lacks introns and produces stable mRNA in the absence of splicing. We have prepared a hybrid gene by placing the first exon, first intron (first intervening sequence, designated IVS1), and most of the second exon of the normal human beta-globin gene into the 3' untranslated region of the tk gene. Although this hybrid gene contains all globin sequences presumed necessary for the splicing of IVS1, predominantly, unspliced stable cytoplasmic RNA is produced in both long- and short-term expression assays. Moreover, stable unspliced cytoplasmic RNA is detected whether the intron is situated in a sense or an antisense orientation. Efficient splicing of IVS1 is obtained either by deleting the majority of tk coding sequences or by relocating the globin sequences from the 3' to the 5' untranslated region of the tk gene.
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