Delta and Serrate are redundant Notch ligands required for asymmetric cell divisions within the Drosophila sensory organ lineage.
Asymmetric divisions allow a precursor to produce four distinct cells of a Drosophila sensory organ lineage (SOL). Whereas this process requires cell-cell communication via Notch (N) receptor, mitotic recombination that removes the N ligand Delta (Dl) or Serrate (Ser) in the SOL had mild or no effect. Removal of both Dl and Ser, however, led to cell fate transformations similar to the N phenotype. Cell fate transformation occurred even when a single SOL cell lost both Dl and Ser. Thus, Dl and Ser are redundant in mediating signaling between daughter cells to specify their distinct cell fates.
Zeng
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Howard Hughes Medical Institute and Department of Physiology, University of California, San Francisco, California 94143, USA.
Younger-Shepherd
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D000818:Animals; D002135:Calcium-Binding Proteins; D002454:Cell Differentiation; D002455:Cell Division; D029721:Drosophila Proteins; D004331:Drosophila melanogaster; D036341:Intercellular Signaling Peptides and Proteins; D047908:Intracellular Signaling Peptides and Proteins; D000072100:Jagged-1 Protein; D008024:Ligands; D008565:Membrane Proteins / Q000378:metabolism* / Q000502:physiology; D010641:Phenotype; D011956:Receptors, Cell Surface / Q000378:metabolism*; D051880:Receptors, Notch; D012679:Sense Organs / Q000166:cytology / Q000378:metabolism; D000072099:Serrate-Jagged Proteins; D014921:Wings, Animal
D002135:Calcium-Binding Proteins; D029721:Drosophila Proteins; D036341:Intercellular Signaling Peptides and Proteins; D047908:Intracellular Signaling Peptides and Proteins; D000072100:Jagged-1 Protein; D008024:Ligands; D008565:Membrane Proteins; C497759:N protein, Drosophila; D011956:Receptors, Cell Surface; D051880:Receptors, Notch; C000606278:Ser protein, Drosophila; D000072099:Serrate-Jagged Proteins; C064045:delta protein