Dissecting the roles of the Drosophila EGF receptor in eye development and MAP kinase activation
Copyright policy )Dissecting the roles of the Drosophila EGF receptor in eye development and MAP kinase activation
ABSTRACT A new conditional Egfr allele was used to dissect the roles of the receptor in eye development and to test two published models. EGFR function is necessary for morphogenetic furrow initiation, is not required for establishment of the founder R8 cell in each ommatidium, but is necessary to maintain its differentiated state. EGFR is required subsequently for recruitment of all other neuronal cells. The initial EGFR-dependent MAP kinase activation occurs in the furrow, but the active kinase (dp-ERK) is observed only in the cytoplasm for over 2 hours. Similarly, SEVENLESS-dependent activation results in cytoplasmic appearance of dp-ERK for 6 hours. These results suggest an additional regulated step in this pathway and we discuss models for this.
- Weizmann Institute of Science Israel
- Southern California University for Professional Studies United States
- National University of Singapore Singapore
- Emory University United States
Cell Nucleus, Cytoplasm, Membrane Glycoproteins, Microscopy, Confocal, Temperature, Receptor Protein-Tyrosine Kinases, Genes, Insect, Eye, Models, Biological, Retina, Enzyme Activation, ErbB Receptors, Calcium-Calmodulin-Dependent Protein Kinases, Mutation, Animals, Drosophila Proteins, Drosophila, Eye Proteins, Alleles
Cell Nucleus, Cytoplasm, Membrane Glycoproteins, Microscopy, Confocal, Temperature, Receptor Protein-Tyrosine Kinases, Genes, Insect, Eye, Models, Biological, Retina, Enzyme Activation, ErbB Receptors, Calcium-Calmodulin-Dependent Protein Kinases, Mutation, Animals, Drosophila Proteins, Drosophila, Eye Proteins, Alleles
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