Interaction between Ataxin-2 Binding Protein 1 and Cubitus-interruptus during wing development in Drosophila.
Animal growth and development is dependent on reiterative use of key signaling pathways such as Hedgehog (Hh) pathway. It is widely believed that Cubitus-interruptus (Ci) mediates all functions of Hh pathway. Here we report that CG32062, the Drosophila homologue of Ataxin-2 Binding Protein 1 (dA2BP1), functions as a cofactor of Ci to specify intervein region between L3 and L4 veins of the adult wing. Specifically, Ci-mediated transactivation of knot/collier (kn) in this region of the developing wing imaginal disc is dependent on dA2BP1 function. Protein interaction studies and chromatin-immunoprecipiation experiments suggest that Ci helps dA2BP1 to bind kn promoter, which in turn may help Ci to activate kn expression. These results suggest a mechanism by which Ci may activate targets such as kn, which do not have classical Ci/Gli-binding sites.
Centre for Cellular and Molecular Biology, Hyderabad 500007, India. nusha@ccmb.res.in
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Usha
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Shashidhara
D000818:Animals; D004268:DNA-Binding Proteins / Q000378:metabolism*; D029721:Drosophila Proteins / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000235:genetics / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000378:metabolism*; D014157:Transcription Factors / Q000378:metabolism*; D014921:Wings, Animal / Q000378:metabolism
D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D016601:RNA-Binding Proteins; C500367:Rbfox1 protein, Drosophila; D014157:Transcription Factors; C092937:ci protein, Drosophila; C104357:kn protein, Drosophila