title: Common and distinct roles of DFos and DJun during Drosophila development.
abstract: The Drosophila homolog of c-Jun regulates epithelial cell shape changes during the process of dorsal closure in mid-embryogenesis. Here, mutations in the DFos gene are described. In dorsal closure, DFos cooperates with DJun by regulating the expression of dpp; Dpp acts as a relay signal that triggers cell shape changes and DFos expression in neighboring cells. In addition to the joint requirement of DFos and DJun during dorsal closure, DFos functions independently of DJun during early stages of embryogenesis. These findings demonstrate common and distinct roles of DFos and DJun during embryogenesis and suggest a conserved link between AP-1 (activating protein-1) and TGF-beta (transforming growth factor-beta) signaling during epithelial cell shape changes.
authors.affiliation: Zoologisches Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
authors.forename: J R
authors.initials: JR
authors.lastname: Riesgo-Escovar
authors.forename: E
authors.initials: E
authors.lastname: Hafen
mesh_terms: D000818:Animals; D048429:Cell Size; D019281:Dimerization; D004330:Drosophila / Q000196:embryology* / Q000235:genetics / Q000378:metabolism; D029721:Drosophila Proteins; D004475:Ectoderm / Q000378:metabolism; D004707:Endoderm / Q000378:metabolism; D004847:Epithelial Cells / Q000166:cytology / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D017344:Genes, Insect; D016762:Genes, fos; D016758:Genes, jun; D018398:Homeodomain Proteins / Q000235:genetics; D019476:Insect Proteins / Q000235:genetics / Q000502:physiology; D048031:JNK Mitogen-Activated Protein Kinases; D048670:MAP Kinase Kinase 4; D008675:Metamorphosis, Biological; D020929:Mitogen-Activated Protein Kinase Kinases; D009154:Mutation; D007703:Peptidyl-Dipeptidase A / Q000235:genetics; D010641:Phenotype; D017354:Point Mutation; D011494:Protein Kinases / Q000235:genetics / Q000378:metabolism; D016760:Proto-Oncogene Proteins c-fos / Q000502:physiology*; D016755:Proto-Oncogene Proteins c-jun / Q000502:physiology*; D015398:Signal Transduction; D018808:Transcription Factor AP-1 / Q000378:metabolism; D016212:Transforming Growth Factor beta / Q000235:genetics / Q000378:metabolism
chemical_list: D029721:Drosophila Proteins; D018398:Homeodomain Proteins; D019476:Insect Proteins; D016760:Proto-Oncogene Proteins c-fos; D016755:Proto-Oncogene Proteins c-jun; D018808:Transcription Factor AP-1; D016212:Transforming Growth Factor beta; C064196:dpp protein, Drosophila; C059843:lab protein, Drosophila; D011494:Protein Kinases; D048031:JNK Mitogen-Activated Protein Kinases; D048670:MAP Kinase Kinase 4; D020929:Mitogen-Activated Protein Kinase Kinases; C104431:Ance protein, Drosophila; D007703:Peptidyl-Dipeptidase A