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Molecular and Cellular Biology, August 1999, p. 5743-5758, Vol. 19, No. 8
0270-7306/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Notch and Wingless Regulate Expression of Cuticle
Patterning Genes
Cedric Satish
Wesley*
Laboratory of Genetics, The Rockefeller
University, New York, New York 10021
Received 6 April 1999/Accepted 5 May 1999
The cell surface receptor Notch is required during
Drosophila embryogenesis for production of epidermal
precursor cells. The secreted factor Wingless is required for
specifying different types of cells during differentiation of tissues
from these epidermal precursor cells. The results reported here show
that the full-length Notch and a form of Notch truncated in the amino
terminus associate with Wingless in S2 cells and in embryos. In S2
cells, Wingless and the two different forms of Notch regulate
expression of Dfrizzled 2, a receptor of Wg;
hairy, a negative regulator of achaete
expression; shaggy, a negative regulator of
engrailed expression; and patched, a negative
regulator of wingless expression. Analyses of expression of
the same genes in mutant N embryos indicate that the
pattern of gene regulations observed in vitro reflects regulations in vivo. These results suggest that the strong genetic interactions observed between Notch and wingless genes
during development of Drosophila is at least partly due to
regulation of expression of cuticle patterning genes by Wingless and
the two forms of Notch.
*
Mailing address: Laboratory of Genetics, Box 288, The
Rockefeller University, 1230 York Ave., New York, NY 10021. Phone:
(212) 327-8233. Fax: (212) 327-7420. E-mail:
wesleyc{at}rockvax.rockefeller.edu.
Molecular and Cellular Biology, August 1999, p. 5743-5758, Vol. 19, No. 8
0270-7306/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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