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Ligand-independent activation of the sevenless receptor tyrosine kinase changes the fate of cells in the developing Drosophila eye.


Basler, K; Christen, B; Hafen, E (1991). Ligand-independent activation of the sevenless receptor tyrosine kinase changes the fate of cells in the developing Drosophila eye. Cell, 64(6):1069-1081.

Abstract

Cell fate in the developing eye is determined by a cascade of inductive interactions. In this process, the sevenless protein--a receptor tyrosine kinase--is required for the specification of the R7 photoreceptor cell fate. We have constructed a gain-of-function sevenless mutation (SevS11) by overexpressing a truncated sevenless protein in the cells where sevenless is normally expressed. In SevS11 mutant flies, all sevenless-expressing cells initiate neural development. This results in the formation of multiple R7-like photoreceptors per ommatidium. Therefore, sevenless activity appears to be necessary and sufficient for the determination of R7 cell fate. These results illustrate the central role receptor tyrosine kinases can play in the specification of cell fate during development.

Cell fate in the developing eye is determined by a cascade of inductive interactions. In this process, the sevenless protein--a receptor tyrosine kinase--is required for the specification of the R7 photoreceptor cell fate. We have constructed a gain-of-function sevenless mutation (SevS11) by overexpressing a truncated sevenless protein in the cells where sevenless is normally expressed. In SevS11 mutant flies, all sevenless-expressing cells initiate neural development. This results in the formation of multiple R7-like photoreceptors per ommatidium. Therefore, sevenless activity appears to be necessary and sufficient for the determination of R7 cell fate. These results illustrate the central role receptor tyrosine kinases can play in the specification of cell fate during development.

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Additional indexing

Item Type:Journal Article, refereed
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
Dewey Decimal Classification:570 Life sciences; biology
Language:English
Date:22 March 1991
Deposited On:11 Feb 2008 12:19
Last Modified:05 Apr 2016 12:16
Publisher:Elsevier
ISSN:0092-8674
Publisher DOI:10.1016/0092-8674(91)90262-W
PubMed ID:2004416
Permanent URL: http://doi.org/10.5167/uzh-989

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