Abstract
ERYTHROID-specific genes contain binding sites for NF-E1 (also called GF-1 and Eryf-1 ; refs 1–3 respectively), the principal DNA-binding protein of the erythrocytic lineage. NF-E1 expression seems to be restricted to the erythrocytic lineage4. A closely related (if not identical) protein is found in both a human megakaryocytic cell line and purified human megakaryocytes; it binds to promoter regions of two megakaryocytic-specific genes. The binding sites and partial proteolysis profile of this protein are indistinguishable from those of the erythroid protein; also, NF-E1 messenger RNA is the same size in both the megakaryocytic and erythroid cell lines. Furthermore, point mutations that abolish binding of NF-E1 result in a 70% decrease in the transcriptional activity of a megakaryocytic-specific promoter. We also find that NF-E2, another trans5-acting factor of the erythrocytic lineage, is present in megakaryocytes. Transcriptional effects in both lineages might then be mediated in part by the same specific trans-acting factors. Our data strengthen the idea of a close association between the erythrocytic and the megakaryocytic lineages and could also explain the expression of markers specific to the erythrocytic and megakaryocytic lineages in most erythroblastic and megakary-oblastic permanent cell lines5,7.
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Romeo, PH., Prandini, MH., Joulin, V. et al. Megakaryocytic and erythrocytic lineages share specific transcription factors. Nature 344, 447–449 (1990). https://doi.org/10.1038/344447a0
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DOI: https://doi.org/10.1038/344447a0
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