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The Drosophila homolog of the mouse mammary oncogene int-1 is identical to the segment polarity gene wingless

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Citation

Rijsewijk, F., Schuermann, M., Wagenaar, E., Parren, P., Weigel, D., & Nusse, R. (1987). The Drosophila homolog of the mouse mammary oncogene int-1 is identical to the segment polarity gene wingless. Cell, 50(4), 649-657. doi:10.1016/0092-8674(87)90038-9.


Cite as: https://hdl.handle.net/21.11116/0000-000C-7CA9-B
Abstract
We have isolated the Drosophila melanogaster homolog (Dint-1) of int-1, a conserved cellular oncogene implicated in viral mammary tumorigenesis in mice. The deduced Dint-1 protein sequence contains 468 amino acids and starts with a hydrophobic leader; it is 54% identical to the int-1 sequence, and all 23 cysteine residues are conserved. The putative Drosophila protein has an extra sequence of 85 amino acids, encoded on an additional exon. Dint-1 is expressed throughout development, but transcripts are barely detectable in adult flies. Hybridization in situ to embryos reveals a segmented pattern of expression. We show that Dint-1 and the segment polarity gene wingless are identical and map to the same location. The sequence of the gene suggests that the Dint-1/wingless protein functions in morphogenesis as a signal in cell-cell communication.