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. 1989 Jul 25;17(14):5509–5516. doi: 10.1093/nar/17.14.5509

Increased erythroid-specific expression of a mutated HPFH gamma-globin promoter requires the erythroid factor NFE-1.

S Nicolis 1, A Ronchi 1, N Malgaretti 1, R Mantovani 1, B Giglioni 1, S Ottolenghi 1
PMCID: PMC318174  PMID: 2474800

Abstract

The -175 T greater than C mutation in the promoter of the A gamma- or G gamma-globin gene causes a 50-100 fold increase of the expression of the respective gene in adult erythroid cells (Hereditary Persistence of Fetal Hemoglobin). We show here that this mutation increases 3-9 fold the expression of a gamma-CAT reporter plasmid transfected into the erythroid cells K562, but not that of the same plasmid in non erythroid cells. The overexpression of the mutant is abolished by the mutation of the binding site for the erythroid specific factor NFE1; inactivation of the adjacent binding site for the ubiquitous factor OTF1 does not cause overexpression of the normal gamma-globin promoter. Previous results demonstrated that the -175 mutation slightly increases the in vitro binding of NFE1 and almost abolishes that of OTF1; the present functional data indicate that altered binding of NFE1, but not of OTF1, is responsible for the observed overexpression of the mutated promoter.

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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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