Ci: a complex transducer of the hedgehog signal.
Recent progress has unveiled Cubitus interruptus (Ci) as a complex transcription factor whose diverse activities as an activator and repressor are regulated by its proteolysis, localization and concentration. The principal role of Ci is to elaborate the developmental program directed by the morphogen Hedgehog (Hh), and it uses its various activities to target the expression of key downstream genes to different spatial domains. Here, we highlight recent advances in the Ci story, and discuss remaining questions whose resolution promise to help explain how morphogens like Hh signal their distant targets.
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Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94143, USA. pedrin@itsa.ucsf.edu
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D000818:Animals; D004268:DNA-Binding Proteins / Q000235:genetics / Q000502:physiology*; D029721:Drosophila Proteins; D004331:Drosophila melanogaster / Q000196:embryology* / Q000235:genetics; D018507:Gene Expression Regulation, Developmental; D017344:Genes, Insect; D053823:Hedgehog Proteins; D019476:Insect Proteins / Q000235:genetics / Q000502:physiology*; D008565:Membrane Proteins / Q000502:physiology; D009024:Morphogenesis; D010641:Phenotype; D011518:Proto-Oncogene Proteins / Q000502:physiology; D011956:Receptors, Cell Surface; D015398:Signal Transduction / Q000502:physiology*; D014157:Transcription Factors; D014921:Wings, Animal / Q000196:embryology; D051155:Wnt1 Protein
D004268:DNA-Binding Proteins; D029721:Drosophila Proteins; D053823:Hedgehog Proteins; D019476:Insect Proteins; D008565:Membrane Proteins; D011518:Proto-Oncogene Proteins; D011956:Receptors, Cell Surface; D014157:Transcription Factors; D051155:Wnt1 Protein; C092937:ci protein, Drosophila; C064196:dpp protein, Drosophila; C070844:ptc protein, Drosophila; C074622:wg protein, Drosophila; C077245:hh protein, Drosophila