Abstract
The Notch protein (N) acts as a transmembrane receptor for intercellular signals controlling cell fate choices in vertebrates and invertebrates. The signal of N activation may be transduced directly from the cell surface into the nucleus by an evolutionarily conserved transcription factor, Suppressor of Hairless [Su(H)], by its regulated nuclear import. Su(H) is shown here to play a direct role in the immediate response of the genome to N signaling in Drosophila. First, Su(H) mutant embryos derived from mutant germ-line clones exhibited a "neurogenic" phenotype of neural hypertrophy similar to the N phenotype. Second, the lack of N lateral signaling in these Su(H) mutant embryos was associated with a failure to express the m5 and m8 genes from the Enhancer of split Complex [E(spl)-C]. Finally, the Su(H) protein bound to the regulatory sequences of the E(spl)-C m5 and m8 genes, and these binding sites were required for the activation of the m5 and m8 promoters in the ventral neuroectoderm. The expression of the E(spl)-C m8 gene was found to be similarly regulated by Su(H) during wing imaginal disc development. Thus, the transcriptional activation of these E(spl)-C genes by Su(H) appears to be a direct and relatively general response to the activation of N. However, we also present evidence indicating that N signals in an Su(H)-independent manner during mesectoderm formation.
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Dates
Type | When |
---|---|
Created | 18 years, 3 months ago (June 5, 2007, 5:15 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 14, 2021, 9:42 p.m.) |
Indexed | 2 weeks, 4 days ago (Aug. 19, 2025, 6:10 a.m.) |
Issued | 29 years, 10 months ago (Nov. 1, 1995) |
Published | 29 years, 10 months ago (Nov. 1, 1995) |
Published Online | 29 years, 10 months ago (Nov. 1, 1995) |
Published Print | 29 years, 10 months ago (Nov. 1, 1995) |
@article{Lecourtois_1995, title={The neurogenic suppressor of hairless DNA-binding protein mediates the transcriptional activation of the enhancer of split complex genes triggered by Notch signaling.}, volume={9}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.9.21.2598}, DOI={10.1101/gad.9.21.2598}, number={21}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Lecourtois, M and Schweisguth, F}, year={1995}, month=nov, pages={2598–2608} }