Dally cooperates with Drosophila Frizzled 2 to transduce Wingless signalling

Xinhua Lin and Norbert Perrimon
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Xinhua Lin: Department of Genetics
Norbert Perrimon: Howard Hughes Medical Institute, Harvard Medical School

Nature, 1999, vol. 400, issue 6741, 281-284

Abstract: Abstract The Drosophila wingless gene (wg) encodes a protein of the Wnt family and is a critical regulator in many developmental processes1. Biochemical studies have indicated that heparan sulphate proteoglycans, consisting of a protein core to which heparan sulphate glycosaminoglycans are attached2, are important for Wg function3. Here we show that, consistent with these findings, the Drosophila gene sulfateless (sfl), which encodes a homologue of vertebrate heparan sulphate N -deacetylase/N -sulphotransferase (an enzyme needed for the modification of heparan sulphate) is essential for Wg signalling. We have identified the product of division abnormally delayed (dally), a glycosyl-phosphatidyl inositol (GPI)-linked glypican, as a heparan sulphate proteoglycan molecule involved in Wg signalling. Our results indicate that Dally may act as a co-receptor for Wg, and that Dally, together with Drosophila Frizzled 2, modulates both short- and long-range activities of Wg.

Date: 1999
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DOI: 10.1038/22343

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