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. 1989 Aug 25;17(16):6681–6691. doi: 10.1093/nar/17.16.6681

The deletion of the distal CCAAT box region of the A gamma-globin gene in black HPFH abolishes the binding of the erythroid specific protein NFE3 and of the CCAAT displacement protein.

R Mantovani 1, G Superti-Furga 1, J Gilman 1, S Ottolenghi 1
PMCID: PMC318359  PMID: 2476717

Abstract

Non-deletion Hereditary Persistence of Fetal Hemoglobin (HPFH) is characterized by great elevation of the synthesis, in adult age, of fetal hemoglobin (HbF), of either the A gamma or G gamma type. Strong genetic evidence indicates point mutations in the G gamma- or A gamma-globin promoter as responsible for overexpression of the mutated gene. Here we report that a 13 nucleotides deletion in the CCAAT box region of the A gamma-globin promoter, associated with greater than 100 fold overexpression of the gene, abolishes the in vitro binding of the ubiquitous factors CP1 and CDP (CCAAT displacement protein) and of the erythroid specific protein NFE3. Loss of NFE3 binding is consistent with a similar effect of the -117 G greater than A HPFH mutation, suggesting a possible role of NFE3 as a negatively acting factor. In addition, loss of CDP binding indicates that this alteration might also contribute to the HPFH phenotype in this particular case, suggesting possible heterogeneity of the mechanisms causing HPFH.

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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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