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EMBO J. 1990 Nov;9(11):3631-9.

Thyroid nuclear factor 1 (TTF-1) contains a homeodomain and displays a novel DNA binding specificity.

Author information

  • 1European Molecular Biology Laboratory (EMBL), Heidelberg, FRG.

Abstract

The cDNA for TTF-1, a thyroid nuclear factor that binds to the promoter of thyroid specific genes, has been cloned. The protein encoded by the cDNA shows binding properties indistinguishable from those of TTF-1 present in nuclear extracts of differentiated rat thyroid cells. The DNA binding domain of TTF-1 is a novel mammalian homeodomain that shows considerable sequence homology to the Drosophila NK-2 homeodomain. TTF-1 mRNA and corresponding binding activity are detected in thyroid and lung. The chromosomal localization of the TTF-1 gene has been determined in humans and mice and corresponds to chromosomes 14 and 12, respectively, demonstrating that the TTF-1 gene is not located within previously described clusters of homeobox-containing genes.

PMID:
1976511
[PubMed - indexed for MEDLINE]
PMCID:
PMC552115
Free PMC Article
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