Nucleic Acids Research, 1987, Vol. 15, No. 9 3671-3688
© 1987
Articles |
Changes in minor transcripts from the
1 and ßmaj globin and glutathione peroxidase genes during erythropoiesis
The Beatson Institute for Cancer Research, Garscube Estate Switchback Road, Bearsden, Glasgow G61 1BD *Paterson Laboratories Wilmnslow Road, Manchester, UK
Received February 9, 1987. Revised April 16, 1987. Accepted April 16, 1987.
We have analysed the transcriptional regulation of the murine
1 and ßmaj globin genes and the glutathione peroxidase (GSHPx) gene, which are all highly expressed during erythropoiesis. The levels of minor RNAs compared to the major message were monitored throughout differentiation within the erythroid lineage. For each gene, upstream transcripts arise from distinct clusters of sites which are regulated differently during differentiation: some occur only during early erythropoiesis, some occur early and persist to the terminal stages, while others accumulate later and roughly in parallel with the main RNA transcript. In addition, opposite strand transcripts from the GSHPx gene were found in increasing amounts during later stages of erythropoiesis. The initiation sites for specific subsets of these minor transcripts lie close to sequences known to be involved in globin gene regulation (i.e. the TATA, CAAT and the CACCCT boxes) or other conserved sequences; others lie close to developmentally regulated DNase I hypersensitive sites around the globin and GSHPx genes.
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